frame.unreal_thumb_touch: UE4 OculusInput's ThumbUp from the capacitive touches instead of near-touch, which the Frame never reports (thumbs always pointed up). Three instructions in SendControllerEvents (masks 0x2/0x8 -> 0x0f00/0x000f, NearTouches load -> Touches), matched exactly; suggested where the code matches (analysis unreal_thumb_touch, ANALYSIS_VERSION 7): Vader Immortal Ep. I, Robo Recall, Phantom: Covert Ops, Time Stall, Star Wars: Tales. Vader's recipe uses it instead of proximity_emul (the binding didn't animate the thumbs). Found by Klownicle, GitHub #49

Mesa enforces OVR_multiview's rule that a draw's program declares as many views as the draw framebuffer has and drops the draw silently; Doom3Quest compiles every vertex shader with layout(num_views=2) and draws its HUD/PDA into 2D-texture FBOs, which stay black on the Frame.

native/glmv (libfpglmv.so, same length as libGLESv3.so): the engine library's dlopen string is rewritten to it and it becomes the first DT_NEEDED. It records stage sources at link time and, when a multiview program draws into a framebuffer without views, draws with a lazily built single-view twin (num_views layout blanked, gl_ViewID_OVR -> 0u; attribute locations, block bindings and uniform values copied), then rebinds the original. Opt-in and experimental (analysis gl_multiview_libs, ANALYSIS_VERSION 6), setting gl_mv_debug, triage gl-multiview-twin-failed.

Host tests: the rewriter on Doom3Quest's 19 shaders (GPL-3.0 fixtures) and glmv.c against a stand-in GL that applies Mesa's rule. Untested on the device.

.github/workflows/build.yml

@@ -5,6 +5,15 @@ on:
     tags: ["v*"]
   pull_request:
   workflow_dispatch:
+    inputs:
+      dev:
+        description: "Publish the bundles as the dev build (testers: Settings → Updates → Install the latest dev build)"
+        type: boolean
+        default: true
+      notes:
+        description: "What testers should try (shown before they install it)"
+        type: string
+        default: ""
 
 jobs:
   test:
@@ -50,6 +59,9 @@ jobs:
         if: runner.os == 'Linux'
         run: sudo apt-get update && sudo apt-get install -y ninja-build libgtk-3-dev
       - run: uv sync --extra dev
+      - name: Dev build version (next patch + .dev<run number>; not committed)
+        if: github.event_name == 'workflow_dispatch' && inputs.dev
+        run: uv run --no-project python scripts/dev_version.py ${{ github.run_number }}
       - id: flet
         run: uv run python scripts/package.py
         continue-on-error: ${{ runner.os == 'macOS' || runner.arch == 'ARM64' }}
@@ -84,8 +96,27 @@ jobs:
         if: runner.os == 'macOS'
         run: |
           app=$(find dist -maxdepth 3 -name "*.app" -type d | head -1)
-          codesign --force --deep --sign - "$app"
+          # Re-signing replaces the signature, entitlements included: pass them again, or the file picker refuses to
+          # open ("ENTITLEMENT_NOT_FOUND", GitHub #63). flet build writes them to Release.entitlements; the
+          # PyInstaller fallback has none, so it gets the same set.
+          ent=build/flutter/macos/Runner/Release.entitlements
+          if [ ! -f "$ent" ]; then
+            ent="$RUNNER_TEMP/FramePort.entitlements"
+            cat > "$ent" <<'EOF'
+          <?xml version="1.0" encoding="UTF-8"?>
+          <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+          <plist version="1.0"><dict>
+            <key>com.apple.security.cs.allow-jit</key><true/>
+            <key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/>
+            <key>com.apple.security.network.client</key><true/>
+            <key>com.apple.security.network.server</key><true/>
+            <key>com.apple.security.files.user-selected.read-write</key><true/>
+          </dict></plist>
+          EOF
+          fi
+          codesign --force --deep --sign - --entitlements "$ent" "$app"
           codesign --verify --deep --strict --verbose=2 "$app"
+          codesign -d --entitlements - "$app" 2>/dev/null | tee /dev/stderr | grep -q "files.user-selected.read-write"
 
       # ---- package (archives keep permissions/symlinks) + provenance ----
       - name: Package (Windows)
@@ -148,3 +179,43 @@ jobs:
             echo; cat packaging/release-footer.md; } > "$notes"  # short: the update dialog shows these notes
           gh release delete "$tag" --yes 2>/dev/null || true
           gh release create "$tag" out/* packaging/FramePort-selfsigned.cer --title "FramePort ${tag}" --notes-file "$notes"
+
+  dev-release:
+    # "Run workflow" with dev ticked: replaces the rolling `dev` pre-release (never shown by the automatic update check;
+    # testers install it from Settings → Updates). Same assets + SHA256SUMS as a release.
+    if: github.event_name == 'workflow_dispatch' && inputs.dev
+    needs: bundle
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          fetch-depth: 0
+      - uses: astral-sh/setup-uv@v10.2.0
+      - id: version
+        run: echo "version=$(uv run --no-project python scripts/dev_version.py ${{ github.run_number }})" >> "$GITHUB_OUTPUT"
+      - uses: actions/download-artifact@v8
+        with:
+          path: out
+          merge-multiple: true
+      - name: Wheel
+        run: uv build --wheel -o out && ls out
+      - name: Checksums
+        run: cd out && sha256sum * > SHA256SUMS.txt && cat SHA256SUMS.txt
+      - name: Publish the dev build
+        env:
+          GH_TOKEN: ${{ github.token }}
+          VERSION: ${{ steps.version.outputs.version }}
+          NOTES: ${{ inputs.notes }}
+        run: |
+          notes=$(mktemp)
+          last=$(git describe --tags --abbrev=0 --match 'v*' 2>/dev/null || true)
+          { echo "Dev build **${VERSION}** from commit ${GITHUB_SHA::7} ($(date -u +%Y-%m-%d)). For testing fixes before"
+            echo "the next release; you get that release as a normal update."; echo
+            if [ -n "$NOTES" ]; then echo "## Please test"; echo; echo "$NOTES"; echo; fi
+            if [ -n "$last" ]; then echo "## Changes since ${last}"; echo
+              git log --no-merges --format='- %s' "${last}..HEAD" | cut -c1-160 | head -40; fi; } > "$notes"
+          gh release delete dev --yes --cleanup-tag 2>/dev/null || true
+          gh release create dev out/* packaging/FramePort-selfsigned.cer --prerelease --target "$GITHUB_SHA" \
+            --title "FramePort dev build ${VERSION}" --notes-file "$notes"

.gitignore

@@ -19,3 +19,4 @@ CLAUDE.local.md
 # outputs of `frameport report` / `parity` / ruff
 REPORT.md
 .ruff_cache/
+.claude/worktrees/

CLAUDE.md

@@ -21,7 +21,38 @@ Read `docs/PLAYBOOK.md` (symptom → fix) before debugging a game, and `docs/FRA
     the "Send files" dialog, game menu → "Add videos & files…" = `go("files", pkg)`; multi-select bar (download/
     delete); drag-and-drop from the OS via the `flet-dropzone` extension (Apache-2.0, Flutter `desktop_drop`), which
     only a `flet build` bundle contains: `files.dropzone_available()` keeps it out of source runs and the PyInstaller
-    fallback, which would show an unknown control); settings; welcome; activity panel).
+    fallback, which would show an unknown control); screenshots (Steam screenshots on the Frame, `install/screenshots.py`
+    + agent v46 `list_screenshots`/`delete_screenshots`: the Frame files every headset shot under SteamVR 250820, so
+    launch.sh logs `start/end <unix>` to `<anchor>/plays.log` (upgrade_launchers adds it; Proton launchers exec → start
+    only) and shots are matched by time; thumbnails cached in `<data>/screenshots-cache/<frame>/`, shown by asset URL;
+    delete leaves screenshots.vdf alone (Steam rewrites it at exit); game menu → "Screenshots" = `go("screenshots",
+    pkg)`); live view (`views/live.py` + `install/livestream.py`: the Frame's built-in SteamVR "headset view" webcam
+    (`steamvr-v4l2cam.service` → v4l2loopback "SteamVR" /dev/video99, see docs/FRAME_RUNTIME.md) + the default
+    output's pulse monitor (sound) → `fp_venc` (`native/venc`, own clean-room V4L2 driver of the Frame's iris
+    hardware encoder: RGB24→NV12 box downscale with NEON, H.264 CBR, one frame per slot of an even fraction of the
+    panel rate read from DRM, e.g. 96 Hz → 32 fps; stdin `k` = keyframe, EOF = stop; `--probe` / `--selftest`;
+    artifact `linux-arm64-bin/`, synced to `~/.local/share/frameport/bin` by sha256 at stream start, no agent change)
+    piped into ffmpeg (`-c:v copy` + AAC), else the old ffmpeg/x264 30 fps path (qualities scale down only; "full" =
+    SteamVR's size; stderr `live: encoder=… fps=…` → status line) →
+    fragmented MP4 on an SSH exec channel's stdout (stdin EOF stops it) → relay on 127.0.0.1 (a new viewer asks
+    the hardware encoder for a keyframe and waits for it, else gets init + fragments since the last keyframe of the
+    *video* track) → player page
+    `install/live_player.py` (MSE; starts muted as browsers require, "Sound on" button; 0.3 s cushion, catches up at
+    1.1x, seeks only when >2 s behind: seeking to the very edge starved it) opened
+    in the user's default browser: Flet can't show video outside `flet build` bundles; the stream outlives the tab and
+    stops on disconnect/window close); monitor (`views/monitor.py` + `frame/monitor.py` + agent v62 `_monitor`: one
+    JSON sample per tick over an SSH exec channel while the tab is shown (stopped in go/disconnect/on_close, the
+    agent ends at EOF); sources and costs in docs/FRAME_RUNTIME.md "Monitoring sources"; game card (fps from
+    FrameBridge pacing; End game = Steam's Exit game, then cmd_stop), tiles with `C.Sparkline` (Flet canvas, no charts
+    extension), details, a pooled process table (Game / Steam & SteamVR / All; right-click: end / force kill / end
+    game; MON_CRITICAL needs force, MON_NEVER is refused)); settings; welcome; activity panel). Files, Screenshots and the Library share right-click menus
+    (one `ft.ContextMenu` per view, filled on right-click; on one of several selected items they act on the whole
+    selection, `C.menu_targets`) and click-and-drag multi-select (`C.DragSelect`: pan start/end on the area + item
+    hover events, which Flutter also sends with the button held; Flet can't report item positions, so no rubber band).
+    Selection bars sit below the list: above it, their appearing shifted the items mid-drag. Async handlers (they
+    await a FilePicker) must be coroutine functions or go through `page.run_task`: Flet doesn't await a lambda's
+    coroutine (the Files row Download button silently did nothing). `ui_smoke.py --fake-frame --gestures` drives real
+    mouse drags/right-clicks.
     User tags live in library entries (`tags`), filters in library setting `ui.library`.
     **Performance rules** (the app froze before): never put image bytes in controls — artwork is served by URL from the
     GUI assets dir (= user data dir; `ft.run(assets_dir=…)`), as thumbnails (`artwork/thumbs.py`, Pillow); the
@@ -40,6 +71,14 @@ Read `docs/PLAYBOOK.md` (symptom → fix) before debugging a game, and `docs/FRA
     uploads are interruptible (Cancel checked per MiB) and resumable (big files via SFTP `.part` append, small files
     streamed in tar batches; the agent counts files already in `incoming/`). Multi-select in the Library queues
     installs after asking every needed question up front. Failures end in one pop-up (Resume / Uninstall / log).
+  - Other drives (GitHub #90, agent v63): anchors stay in ~/Applications/quest-frame, a game's files may live in
+    `<mount>/FramePort/<pkg>` (`deployment.json` base). Agent `drives` (/proc/mounts, /run/media + Steam library
+    drives; vfat/exfat/ntfs/read-only refused), prepare*/finalize_linux `dest` (unmounted = error, never a fallback;
+    installed games keep their base), `move` (detached systemd-run + `move_status`; cp -a under podman unshare,
+    count+bytes check, symlink retarget, launch.sh: Quest app_dir line / Linux+PC VR rewritten from the record's
+    `launcher` field, else text swap), list_installed `drive`/`drive_missing` (install_state keeps such games
+    "installed"). PC: `install/drives.py`, library setting `install.drive` (Frame page → Storage), game menu
+    "Move to…" (job kind tool-frame), CLI `frame drives`/`frame move`/`install --dest`. Untested on the device.
   - **PC VR repacks are pre-patched to run directly** (proven: Rick and Morty, Vader Immortal run when the exe is
     launched directly; Revive breaks them). So Rift games default to `as_is` = install the copy unchanged and launch
     the exe directly (`pcvr.xr_timefix` for the Frame OpenXR-1.1→1.0 fix, `pcvr.no_crash_reporter` for Unreal).
@@ -52,7 +91,11 @@ Read `docs/PLAYBOOK.md` (symptom → fix) before debugging a game, and `docs/FRA
     doesn't do). `VD.bat` is Virtual Desktop's launcher: ignore it except as an exe-location hint. Library migration
     `rift_run_direct` resets existing recipes.
     Auto launch-test is skipped on PC installs (it would start the game on the user's desktop). Launch tests collect the Unreal
-    game log + crash summaries from the Proton prefix; triage `unreal-crash`. Lies Beneath via Proton without Revive
+    game log + crash summaries from the Proton prefix; triage `unreal-crash`. Agent v67 adds Unity's logs (LocalLow/<Company>/<Product>/Player(-prev).log via `<Name>_Data/app.info`,
+    `output_log.txt`, Temp/…/Crashes/*/error.log; `unity_logs`) to launch tests and diagnostics; triage `unity-vr-init` /
+    `unity-crash`. A catalog recipe verified with another build (catalog `xr` ≠ the build's) keeps the build's own
+    `pcvr.launch_args` (`engine._other_build`; GitHub #105: SUPERHOT VR's Oculus+OpenVR build needs `-vrmode OpenVR`,
+    the catalog's is the OpenXR build); Electron launchers next to a game rank −30 (`rift.is_electron`). Lies Beneath via Proton without Revive
     crashed (UE 4.23 "Unhandled exception").
   - Rift scanning: `sources/rift_dump.scan` = the scanned folder's subfolders are games (one per folder; a folder is a
     game if all candidate exes sit under one child), recursing into collections; `analysis/rift.py` walks once,
@@ -76,6 +119,11 @@ Rick and Morty runs on the Frame via its catalog recipe (OpenVR, no Revive),
     auto-start SteamVR on Play (`winhost.start_steamvr`); the Frame launcher always uses `/openxr`. UI (`game.py`
     where()) states per-game where it runs; installing an Oculus game on the Frame shows a warning. Migration
     `rift_frame_native` re-analyzes + re-derives existing entries.
+  - Own artwork (0.8.0): game menu → "Use your own artwork…" (also from the Find artwork dialog) =
+    `views/art_dialog.show_custom_art_dialog`: one slot per kind (portrait/landscape/hero/logo/icon), FilePicker →
+    `sources.apply_custom` (Pillow check, ≥64 px, ≤40 MB, scaled to ≤3840 px, PNG if alpha/logo/icon else JPEG,
+    replaces only that kind + its thumbnails, drops the generated cover/banner, writes `.picked` = "custom") /
+    `remove_custom`; Steam shapes are still composed from what exists (`steam.py` PREFER).
   - Art for Rift games: `artwork/sources.py` — Quest version package (OculusDB packageName, exact name or +
     "Unplugged"-type suffix, never sequels) → Meta art; OculusDB square cover; Steam (exact names only); exe icon.
   - Store details (`artwork/details.py`, entry `details`): OculusDB (description, genres, publisher, website; by Quest
@@ -86,6 +134,20 @@ Rick and Morty runs on the Frame via its catalog recipe (OpenVR, no Revive),
     set: the name on a colour from the title hash + the APK icon, `steam_set_for`; 2D Android apps get no store lookups) and tags: how it runs, the original platform
     (Meta Quest / Oculus Rift), genres, user tags — merged with tags set in Steam (non-Steam shortcuts can't hold a
     description).
+  - Linux apps (GitHub #31, library kind `linux`, `linux.<slug>`; x86_64 builds run through FEX (app 3127680, no SLR:
+    RootFS /usr/share/guestos/fex-mesa from the OS image; needs `STEAM_COMPAT_DATA_PATH`, see docs/FRAME_RUNTIME.md):
+    agent v61 `linux_x86_tools`/`pick_tool`, `install_proton`/`proton_status` `kind: linux_x86`, `finalize_linux
+    x86_64`, `installer.ensure_proton(kind=)`; an arm64 program wins over an x86_64 one): GUI = Add
+    games → "Add a Linux app…" /
+    "…folder…" (`app.add_linux` job → `pipeline.add_linux_app`); game page `linux_summary` (program + Change…, AppImage,
+    OpenXR, source) instead of recipe/patches, `C.missing_libraries` callout (Frame deployment, else last install);
+    no Analyze/Rebuild/recipe/share/Game settings actions, Frame only; platform "Linux" badge + library filter; Steam
+    tags "Linux app on Frame"/"Linux"; `_follow_catalog` skips them; local files of a lone AppImage = the file only.
+    Desktop Mode entries (GitHub #84, agent v63): finalize_linux writes `frameport-<slug>.desktop` to
+    ~/.local/share/applications (+ ~/Desktop if it exists; `X-FramePort-Package` marks ours), launch.sh with
+    `FRAMEPORT_DESKTOP=1` skips the Steam-parent watchdog and Steam's display; ensure_host_fixes refreshes entries
+    (older installs, stale ones removed), uninstall/purge remove them. Per app: library entry field `desktop_entry`
+    (default on; patches don't apply to Linux apps) → game page switch → agent `desktop_entry`. Untested on device.
   - Quest/Rift twins stay separate entries, shown and named in Steam "Title (Quest)"/"(Rift)" (`core/titles.py`).
   - `Recipe.as_is` = install unchanged (pre-patched libraries): `pipeline.prepare_as_is`; auto for APKs that already
     contain FrameBridge (`frame_patched`). For Rift it changes nothing (the dump is never modified; the Frame copy
@@ -101,6 +163,10 @@ Rick and Morty runs on the Frame via its catalog recipe (OpenVR, no Revive),
   - `patches/` — **the unit of modularity**. `base.py` (Patch interface, registry), `overport.py` (overport CLI patch ids,
     discovered dynamically via `overport patches`), `frame/*.py` (one module per Frame fix), `settings.py` (FrameBridge
     adapter keys + device files as patches). Add a patch = add a module that calls `register(...)`.
+    `upstream.py`: upstream fixes that replace a workaround per build (a probe finds the fix in OVRPort's output →
+    the build leaves the workaround out, `build.superseded`; recipes unchanged). Registered: `ovrport.haptic_envelope`
+    (→ `adapter.haptic_fix`, `frame/haptic_envelope.py`) and `ovrport.microphone_stream` (→ `frame.ovr_microphone`),
+    both fixed in OVRPort runtime 3.4.3-aa54c3f (ovrport/app#73; haptics owner-verified with Lucky's Tale 2026-10-07).
   - `analysis/` — APK/ELF inspection (`detect.py`), `elf.py` (pyelftools reads; own DT_NEEDED writer), `stubgen.py`
     (generates the ovr_* stub .so without a compiler).
   - `apk/` — `axml.py` (binary manifest editor), `workspace.py` (staged zip edits), `sign.py` (apksigner; it aligns too).
@@ -147,7 +213,7 @@ Rick and Morty runs on the Frame via its catalog recipe (OpenVR, no Revive),
 - `agent/frameport_agent.py` — runs **on the Frame** (python3 stdlib only), JSON over SSH. Owns the install layout,
   launch.sh template, Steam shortcuts (binary VDF), launch tests. Bump `AGENT_VERSION` when changing it.
 - `bootstrap/bootstrap.sh` — one-time Frame setup served by the pairing server (sshd, app key, avahi service, Lepton).
-- `catalog/games/<package>.yaml` — 38 recipes (34 verified 2026-09-28; Deadpool VR, 4XVR, NEX Player and AC Nexus's
+- `catalog/games/<package>.yaml` (installed apps also fetch these from GitHub `main`, see "Catalog updates") — 38 recipes (34 verified 2026-09-28; Deadpool VR, 4XVR, NEX Player and AC Nexus's
   90 Hz default confirmed later by the owner); `catalog/triage.yaml` — log signatures → fixes.
 - `native/` — sources of the prebuilt binaries in `artifacts/` (adapter, VrApi bridge patches, GL shim, stubs).
   `native/build.py` rebuilds them with NDK r27c (downloaded on demand into `native/.cache`, git-ignored; uses
@@ -383,7 +449,7 @@ GPU. Learned in the headset: quads can't be a background (the Frame draws quad l
 whatever the order: hid 4XVR's balcony/controllers), and the Frame doesn't reproject a projection layer from its own
 pose (images drawn only after head turns, or ahead from xrWaitFrame and sometimes late, wobbled);
 `equirect_flip/face/res/fps/stereo`), `stable_local`, `focus_hold` (only after 3 s FOCUSED, dips <600 ms),
-`aim_pitch/aim_yaw/aim_forward`, `refresh_rate`, `layer_debug` (diagnostics). 4XVR re-creates LOCAL spaces every 2–4 s
+`aim_pitch/aim_yaw/aim_forward`, `refresh_rate`, `layer_debug` (diagnostics); focus_hold is default-on since 2026-10-05. 4XVR re-creates LOCAL spaces every 2–4 s
 (menu recentring suspect); its theatres are baked 7680×3840 equirect2 images (`assets/100.png` …). Test 360° videos
 (NASA, public domain) are in the Frame's ~/Videos; copies in `~/Downloads/frameport-360`. 4XVR's "Internal Storage"
 lists its own `/sdcard/4XPlayer`, not Movies: agent v25 `link_media` hard-links sent files into an app's own top-level
@@ -475,7 +541,7 @@ recipe keeps it on). I Am Cat works with issues (judder; scale 0.8 no help). Rob
 libroblox, also with the Vulkan shim). Installs skip the Steam restart when the shortcut is unchanged and wait while a
 game runs (agent v37). New default fixes in FramePort's code reach games already in a library: after every app update
 `library._follow_catalog` re-derives each non-user recipe once (setting `recipes.app_version`; tests switch it off via
-`library.REFRESH_ON_UPDATE`); analysis fields added later still need a re-analysis. Troubleshooting techniques: docs/PLAYBOOK.md "Debugging techniques". Unity `boot.config` "vulkan" substring mislabels GLES games as Vulkan
+`library.REFRESH_ON_UPDATE`). Analysis fields added later: **bump `analysis/detect.ANALYSIS_VERSION`** (stored as `analysis.extra.analysis_version`); older entries whose APK is still there are analysed again at the GUI's start (background thread, not a job: ~8 s per 900 MB APK) and before a build (`pipeline.refresh_analyses`, GitHub #104); only `analysis`/`suggested` change, user recipes stay; an unreadable APK gets `analysis_failed` = the version (not retried until the next bump). Troubleshooting techniques: docs/PLAYBOOK.md "Debugging techniques". Unity `boot.config` "vulkan" substring mislabels GLES games as Vulkan
 (I Am Cat ran GLES); OVRPlugin's "Unavailable OpenXR extension: XR_FB_scene" is routine (no longer triaged).
 **Round 4 (2026-10-04):** XR_KHR_android_surface_swapchain is listed by the Frame's runtime but returns
 FUNCTION_UNSUPPORTED → adapter `surface_emul` (default on, `native/adapter/surface_swapchain.c`): an ordinary runtime
@@ -492,16 +558,152 @@ lacks (ActivityNotFoundException) → imported by hand: libmain.so + game.json
 DATA/ → external files/WiiCompiledOpenXRVR/DATA, MOD/ → .../RetroRewind6 (decompiled with jadx). Lepton has no
 picker at all: a FramePort fix would be an injected picker activity. Generated cover/banner art used to suppress the
 Steam placeholder set (no Steam art at all) → fixed in artwork/steam.py.
-**Steam library failures (GitHub #21/#30, open):** on 0.7.0 some Frames have FramePort's shortcut in shortcuts.vdf (so the install skips the Steam restart) yet Steam answers Play with "Game configuration unavailable" (= `Steam_AppUpdateError_9`; console_log: `LaunchGameAction: launch error 9 <appid>`). Not reproducible on the dev Frame (same SteamOS build). Agent v42: `launch` returns `steam` = what Steam's console_log says about that launch (started / error + code / silent; the app logs it and offers Report a problem on an error) and `collect_diag` adds `steam_library` (real Steam dir behind ~/.steam, client beta, Steam start vs shortcuts.vdf write time, FramePort's entries per account) + `steam-console.txt`. Verified on the dev Frame 2026-10-04 (Play → `started` within ~1 s). The dev Frame runs Steam's **arm64 beta** client (`package/beta` = linux_arm64_beta_…): check whether reporters are on the stable client. Next: read those from a reporter's zip.
+**Steam library failures (GitHub #21/#30):** on some Frames Steam never loads FramePort's shortcuts.vdf entries (same SteamOS build and arm64 beta client as the dev Frame; IDs correct; file written before Steam starts): Play → console_log `GameAction [AppID <id>] … RequestingLicense → UpdatingAppInfo → LaunchApp failed with AppError_9` (= "Game configuration unavailable", Steam treats the id as a store app). Cause unknown; agent v42/43 diagnostics: `launch` returns `steam` (started / error + code / silent from console_log), `collect_diag` adds `steam_library` (real Steam dir, beta, Steam start vs vdf write time, entries per account, devkit games) + `steam-console.txt` (incl. Steam's `logs/shortcuts.previous.txt` if present; steamclient.so has "LoadShortcuts: rejecting attempt to load shortcuts: invalid account ID"). **Fallback (agent v43):** when Play gets AppError_9 the agent registers the game through Steam's devkit interface (what Valve's Devkit Management Tool does, MIT: `devkit-1 steam://devkit-1/<~/.steam/steam.token>/create-shortcut?response=<file>&gameid=<id>&directory=~/devkit-game` written to ~/.steam/steam.pipe; answer file / `.error`; `~/devkit-game/<id>/launch.sh` = link to the game's launch.sh, `<id>-argv.json` ["launch.sh"] (relative to the folder), `<id>-settings.json` {steam_play 0, compat_tool ""}). Steam adds it live (no restart), picks its own appid (read back from shortcuts.vdf by DevkitGameID), shows it as a normal non-Steam game named "Devkit Game: <id>" (OpenVR 0, but VR works: owner-verified 2026-10-04), art copied to grid/<appid>*. Ids: letter first, then letters/digits/_ only (spaces, '-', leading digit → "missing/invalid arguments"). Later Plays use the devkit entry; uninstall (`devkit_unregister`, `delete-shortcut` live) and purge remove it. Verified on the dev Frame: register/launch/unregister; the AppError_9 trigger itself only in unit tests. GitHub #42 (two Steam accounts, neither MostRecent): Steam rewrote the active account's shortcuts.vdf without FramePort's entries right after starting, and added the devkit entry live without saving it, so `devkit_appid` (vdf only) failed ("Steam added the devkit entry but didn't save it"); agent v55 `devkit_appid_from_log` reads Steam's `sanitize shortcut app id "~/devkit-game/<id>/launch.sh": replacing 0 with N` console line. GitHub #41 (one account): same Steam behaviour, and every install restarts Steam, which forgets the never-saved devkit entry. Agent v56: the log fallback reads only the current session's console_log.txt; Play re-registers a devkit entry that gets AppError_9; art updates also write the devkit entry's grid art (`copy_grid_art`). Open: why some Frames' Steam never loads or saves shortcuts.vdf (single account too).
+**Exit game (GitHub #36, 2026-10-04):** `Apps.TerminateApp` (what Exit game calls; reachable for tests through Steam's CEF devtools on 127.0.0.1:8080, SharedJSContext, `Runtime.evaluate` — a stdlib websocket client is enough) closed both a normal shortcut and a devkit entry on the dev Frame within 1-3 s. SIGTERM to Steam's `reaper` alone left launch.sh + Lepton (setsid) + the container running (an earlier headset launch ran on for 87 min); SIGTERM to launch.sh cleans up in ~4 s. Agent v44: launch.sh's 2 s loop ends the game when its parent (the reaper) is gone; `upgrade_launchers` (from ensure_host_fixes) adds that to existing launchers in place. Which in-headset exit path fails is still unknown. Screenshots on the Frame: all under SteamVR's appid 250820 (`760/remote/250820/screenshots`, screenshots.vdf has creation time, no game).
+**SteamVR dashboard at game start (2026-10-04):** the dashboard (Resume game / controller / VR options) was open whenever a FramePort game started (also over Lepton's 2D launcher). Steam's UI exposes `SteamClient.OpenVR.VROverlay.{IsDashboardVisible,HideDashboard,ShowDashboard}` (CEF devtools, `steam_js` in the agent). Agent v44: launch.sh starts `_dashboard_worker` (waits for FrameBridge's first `pacing:` line in launch.log, then hides a visible dashboard for 25 s, at most 3 times; log `<base>/dashboard.log`; opt out with env FRAMEPORT_KEEP_DASHBOARD=1). Verified on the dev Frame (dashboard shown → 4XVR launched via Steam → hidden ~5 s after the first frames); not yet seen in the headset. **Headset (ITR2, 2026-10-05): too late** — Steam shows its frame menu (`valve.steam.gamepadui.frame.menu`, vrwebhelper_systemui.txt `[PooledPopups] Showing`) ~0.3 s after the game's first submitted frame (FrameBridge `new layer:`), but the first `pacing:` summary comes ~8 s later; the owner had pressed Resume (`[HideDashboard] return_to_game`) before the worker looked. Agent v52: watches from the first `new layer:` line (incremental log reads, 0.5 s polls, 30 s window). Agent v59: watches 120 s and hides up to 10 times (the menu came back after 30 s in the owner's sessions). Agent v53: stops for good once the player opens the dashboard with the controller (`toggle_dashboard_action` in vrwebhelper_systemui.txt since the worker started): v52 closed it 60 ms after each press, and the game, paused for it, stayed paused.
+**Space warp / ITR2 (2026-10-04):** Into The Radius 2 (UE5, `libUnreal.so` + OVRPlugin, Vulkan) uses Application SpaceWarp (extra swapchains `376x376 format=97` motion vectors + `format=129` depth); #35 reports flickering textures. OVRPort's `patch_disable_space_warp` has no effect on UE5, and hiding XR_FB_space_warp in FrameBridge's enumerate doesn't reach the game either: **OVRPort's dispatcher offers/enables XR_FB_space_warp itself**. FrameBridge `hide_space_warp` (per game, off) hides it and strips `XrCompositionLayerSpaceWarpInfoFB` (1000171000) from the projection views (log `hide_space_warp: removed space warp info`); the game still renders its MV swapchains. Test build installed on the dev Frame; flicker not yet checked in a headset. Heuristic: UE5 + OVRPlugin shows it as an option (off). `equirect_emul` is suggested for Unreal games whose graphics API isn't detected ("GLES or unknown"); on Vulkan it switches itself off (Myst/Riven/ITR2): harmless, but Unreal Vulkan detection is a known gap.
+**PR #34 (merged 2026-10-04, Lucas-Mathieu):** `native/adapter/audio_metadata.h` patches Meta XR Audio Wwise (only build ID e1619e7f…, Batman: Arkham Shadow 1.4.1) so queued audio metadata isn't freed while the current audio frame references it (smoke-bomb crash). Verified headless: installs ("metadata reclamation follows …"), 72 fps; we added a once-per-second scan limit. Outside PRs: review source, rebuild `artifacts/` ourselves, merge locally (contributor's commit kept), push main.
+**Heuristics eval (2026-10-04):** `scripts/eval_heuristics.py "<VR CyberDeck Portable>"` → 19/44 recipes exact, 322/352 fields (most diffs: `frame.unity_text_input` suggested where older catalog recipes lack it; the rest are runtime-only findings: use_alt, vk_shader_fix, focus_hold, sync_guard, multipass). `PATCHED/` copies aren't scored (already converted).
+**Power (0.9, agent v47):** sidebar bar below the Frame card: Sleep / Restart / Shut down, each confirmed (`app.frame_power`, a running game asks again). logind answers CanSuspend/CanReboot/CanPowerOff = "challenge" for an SSH session but "yes" inside a user unit, so agent `power` runs `systemctl suspend|reboot|poweroff` from a transient `systemd-run --user --on-active=3` timer (the command answers first). Restart verified on the device (back in ~84 s, new boot id).
+**Proton default (agent v51, owner's choice 2026-10-05):** the newest **stable** ARM64 Proton is the default for PC VR games (`pick_proton`: asked-for name/alias, else newest installed stable, else any stable). Agent v49-50 defaulted to Experimental; the owner's headset A/B with Rick and Morty (Experimental 69 % reprojected frames, stable felt much smoother) reverted it. The game page's Customize shows `pcvr.proton_tool` as a dropdown (Stable (default) / Experimental = alias `proton-experimental`); `ensure_proton` installs a chosen one (it asks once more for the runtime Steam only names after Proton is installed; Experimental installed unattended on the device in 53 s). A PC VR launch test that fails on stable suggests Experimental (`pipeline.PROTON_TOOL`, `proton_alternative_worth_trying`, button "Try Proton Experimental and reinstall"). Remaining Rick and Morty stutter on head turns = the game rendering below the refresh rate (reprojection), not Proton.
+**USB cable link (verified 2026-10-05, cabled to the dev PC):** `usb0` is a USB **NCM** gadget (configfs g1: `ncm.usb0` + `ffs.adb`, Valve 28de:2460) set up by `usb-ncm-gadget@usb0.service`, which only runs with `ConditionPathExists=|/etc/systemd/system/adbd.service.d/steamos-devkit-enabled` = **Developer Mode only**. `usb-ncm-dnsmasq@usb0` serves DHCP with fixed `dhcp-host` entries: Frame 10.86.200.233, PC **10.86.200.234** (`frame/usb.py` FRAME_USB_IP/PC_USB_IP). Windows 11 binds its built-in "UsbNcm Host Device" (no driver); WSL mirrored sees eth 10.86.200.234. USB is high-speed (USB 2.0): upload 36.9 MB/s vs 11.3 MB/s home Wi-Fi. Frame→PC over the cable worked without a firewall change. `scripts/usb_autotest.py` (Windows via powershell.exe from WSL), `frameport frame usb-check`. Wizard "Set up with a USB cable" (`PairingServer(host=PC_USB_IP)`; the real bootstrap ran end to end over USB). Discovery dedupes by SSH host key and prefers USB > Frame hotspot > network (`discovery.dedupe`); a lost address is re-found by key (`Frame.relocate`, tested with a dead saved address).
+**Catalog updates without a release (2026-10-05):** apps fetch `catalog/games/*.yaml` from GitHub `main` (`recommend/catalog.refresh_remote`: one API call `git/trees/main?recursive=1` + raw.githubusercontent downloads of changed blobs, cached as `catalog-gh-<sha>.yaml`, every 6 h; GUI at start + Settings → Data "Check now"; CLI background thread + `frameport catalog-update`). `catalog.load()` only reads the cache. A remote entry is skipped (`unusable_reason`) when it names a patch/adapter key this app doesn't register, has a field `CatalogEntry` doesn't know, or `min_app` > this version: add `min_app` (or rely on new patch ids) when a config needs an unreleased FramePort. Remote beats bundled unless the bundled entry has a later updated/verified date; the user's own entries still win as before. Off: setting `catalog.auto_update`, env FRAMEPORT_NO_CATALOG_UPDATE; FRAMEPORT_CATALOG_URL still overrides the source. So: **pushing a catalog change to main reaches users within 6 h** (their recipes follow via catalog_rev → Update on Frame).
+**Start activity / QuestCraft / ITR2 pop-in (2026-10-05):** WiiCompiled's VR part (`QuestActivity`, SDL, process `:game`) stays behind Lepton's flat window when the launcher is shown (`device.text_input_window`). `frame.start_activity` (opt-in; analysis `extra.vr_activity` = the original APK's activity with Meta's VR category when it isn't the launcher) gives that activity's filter LAUNCHER and every other LAUNCHER becomes INFO, per element (`axml.set_start_activity`); Lepton's own `apk-info-extractor --print-activity-name` (on the Frame under Lepton/liblepton/apk_extractor) then answers QuestActivity. **OVRPort gives every MAIN activity LAUNCHER + VR categories**, so the VR activity must come from the original APK's analysis, not the converted manifest. Lepton has no activity override (`APP_ACTIVITY` is reset when app_metadata.sh is sourced). QuestCraft reaches Minecraft 1.21.5 (Fabric, Vivecraft, Sodium; LTW "Large Thin Wrapper" GL 3.0 on the Frame's Zink) and stops at `OpenGL error 1282` in `WindowFramebuffer` createTexture (Minecraft's crash report in `files/instances/1.21.5/crash-reports/`, Pojlib's `files/latestlog.txt`); the vrclient SIGSEGV / "pthread_mutex_lock called on a destroyed mutex" afterwards is only the shutdown (Unity's render thread still in vrclient while the instance is destroyed). ITR2 "models popping in and out" in game: Unreal reads user config from **internal** storage (`lepton-data/internal/<pkg>/files/UnrealGame/<Project>/<Project>/Saved/Config/Android/Engine.ini`, not external); `r.AllowOcclusionQueries=0` there broke its menus (removed again). Vulkan shim `vk_query_slots` (two slots per occlusion query) never saw ITR2 create an occlusion query pool, and the run with it crashed (Unreal RenderThread SIGSEGV, caught by sentry-native: no tombstone; the backtrace is in `cache/sentry/*/.sentry-native/*.run/*.envelope` with module offsets) - left off. Next suspect: Unreal 5 mobile HZB occlusion reading depth stored with Valve's FDM injection layer; test = launcher `VK_INSTANCE_LAYERS=''` (Lepton then loads neither VALVE_rpo nor VALVE_fdm_injection, Fossilize still). QuestCraft: LTW overrides glGetError and returns 0 with `LIBGL_NOERROR` set; Lepton passes `LEPTON_ENV_<NAME>` to the app as `<NAME>`, so catalog `lepton_env: {LEPTON_ENV_LIBGL_NOERROR: '1'}` gets Minecraft past the GL error 1282; then black picture (see the catalog entry). FrameBridge logs `new layer` once per layer type per process and projection views only for the first frames, so a second session in the same process (Vivecraft after Unity) needs `layer_debug=1`.
+**Vulkan validation / ITR2 solved (2026-10-05):** Khronos' validation layer can't come from Lepton (its layer dir is in the read-only guest image; the Linux copies on the Frame are glibc) and a global `debug.vulkan.layers` property (via the LEPTON_GFXRECON_FP_PROPS trick) kills the container at boot. Working recipe: bundle `libVkLayer_khronos_validation.so` (Khronos android-binaries release, arm64-v8a, stored uncompressed) into a test APK re-signed with the game's key (`apk.sign.sign`), install with `frameport install <pkg> --apk`, and set the Vulkan shim's `vk_validation=1` (it adds the layer at vkCreateInstance; findings under the logcat tag VALIDATION in launch.log, each message ID capped at 10). ITR2's flicker + windows behind models = Unreal's Qualcomm shader-resolve subpasses with a depth resolve of a single-sampled depth attachment (VUID-04908/-03179); `vk_spec_fixes=1` drops that resolve (its TRANSFER_DST half never applies to ITR2: the main depth is transient). Valve's VALVE_rpo layer removed ITR2's fog (catalog `lepton_env: VK_INSTANCE_LAYERS: VK_LAYER_VALVE_fdm_injection`). `r.ViewDistanceScale=2` in the internal Saved/Config/Android/Engine.ini only exists on the owner's Frame (the catalog can't write internal storage yet). Launch tests: Lepton prints a transient "is not a running context" on the first start after an APK change (agent v54 `not_started` waits 30 s for "Boot complete!").
+**GitHub #38/#39 (2026-10-05):** PowerWash Simulator stuck at "Waiting.." on a reporter's Frame = Unity sized the right-eye image rect past its swapchain (rect 268+1656 on a 1920-wide swapchain; the runtime's recommended size differs per Frame) and SteamVR rejected every frame (`xrEndFrame failed -25`, XR_ERROR_SWAPCHAIN_RECT_INVALID), after which the game stopped calling xrEndFrame. FrameBridge `rect_clamp` (default on; sizes noted in xrCreateSwapchain; clamped layers count as swapped) keeps projection/quad rects inside their swapchain; triage `swapchain-rect-invalid`. Not reproducible on the dev Frame with `scale` (Unity's eye sizing isn't just the recommended width); no regression there (72 fps). The adapter's revision was NOT bumped (that would mark every installed game outdated): affected users rebuild. The Room VR (#38) = Unity's render thread SIGSEGV in libgallium_dri.so ~30 ms after the game recreates its eye swapchain with samples=4 (FrameBridge retries samples=1); the game's own code turns MSAA on (not OVRManager); candidate fix: hide GL_EXT_multisampled_render_to_texture (GL shim) - needs the APK to test. The launch test passed both (render thread dead / no frames): triage gap.
+**Headset round 2026-10-05 (evening):** I Am Cat's judder = repeated xrLocateViews of one display time returning
+slightly different poses → FrameBridge `pose_consistency` (owner-verified, works). Lucky's Tale freeze on touching a
+save slot = OVRPort's OpenXR dispatcher converting XR_FB_haptic_amplitude_envelope with ns read as s (GitHub #9) →
+xrshim `haptic_fix` (owner-verified); its remaining short pauses were the wear sensor ("HMD off/on" 0.5-1 s in
+`logs/eyetracking.txt`, not vrserver.txt) → **`focus_hold` is on by default with 5 s** (owner's choice; C defaults
+too). The Room VR works (`unity_no_overlay_copy`). BattleSisters (Unity 2019.4 built-in VR, no libOculusXRPlugin.so)
+flooded "outside of frame bounds" ~2400/s and hung the GPU (kernel hangcheck, zink DEVICE LOST) → the ovrpshim frame
+wait now also applies to Unity 2019 without the Oculus XR Plugin (`UnityOculusCheck.legacy_loop`). Vader Immortal
+(UE4, stuck on the loading image after the intro, GitHub #49): VRP repacks carry a Frida gadget (`libfrda.so`,
+config `hijack_responses`), but OVRPort's `patch_clean_up_frida` removes its loadLibrary call, so it never runs on
+the Frame; `frame.ovr_trace` (opt-in, `native/ovrtrace`: 1138 exported ovr_* stubs → real loader functions, logcat
+tag `fp_ovrtrace`: calls, PopMessage answers, unanswered requests every 10 s) is the next diagnostic.
+**Unity built-in VR input (2026-10-05):** probe builds (`FRAMEPORT_INPUT_PROBE=1 frameport build …`; it logs
+trigger/grip crossings too) showed OVRPlugin returns the full Touch state for every controller mask (also Go masks);
+presses reach the games' OVRInput. Accounting+ (Il2CppDumper v6.7.46 reads its Unity 2017 metadata v24, run on Windows)
+passes stance selection (NewtonVR grip/trigger) but its motion warning waits for `Input.GetMouseButtonDown(0/1)`,
+which Lepton never delivers (no focused Android window) → ovrpshim registers its own
+`UnityEngine.Input::GetMouseButtonDown(System.Int32)` icall (il2cpp_add_internal_call, after Unity's: resolve first)
+that adds a click in the frame a Touch trigger or A/B/X/Y is newly pressed (`unity_oculus_check` revision 3).
+BattleSisters (Unity 2019 InputSystem/XR InputDevices via `VrHandInput`): libunity's Oculus module (OVRPlugin
+function table: a global pointer at 0x16b57c0 in this build, slots filled by name, e.g. +0x160 GetControllerState,
++0x168 State2, +0xe8 GetNodePresent) only reports controllers when `strncmp(deviceModel, "Oculus", 6) == 0` (next to
+the Go check `deviceModel == "Oculus Pacific"`); Lepton's model is "Valve Lepton" → Go/unknown → only Go masks polled,
+buttons dead. `unity_oculus_check` revision 4 (`oculus_model_checks`, Unity 2019 only) turns the 17 compares' length
+into 0 (`orr w2, wzr, #6` → `mov w2, #0` after the adrp/add of the "Oculus" literal; the string stays: it is also
+Unity's VR device name). Device result: libunity now polls `ovrp_GetControllerState(0x3)` (Touch); owner-confirmed
+2026-10-06: buttons work. Its first controller vibration then hit OVRPort's haptic-envelope bug (11 GB, OOM kill) →
+`haptic_fix` is now suggested for every game with libOVRPlugin.so (settings detect), BattleSisters works. Ruled out before: ProductName, GetNodePresent, the device-model string itself, exports.
+Accounting+ works (owner, 2026-10-06).
+**Vader Immortal (UE4, GitHub #49, 2026-10-06, headless):** stuck after the intro on an in-game image (the splash
+quad ends ~6 s in; then the game's own projection frames, 72 fps, balanced xrBeginFrame/xrEndFrame). Not the Platform
+SDK (`frame.ovr_trace`: only user + entitlement, both answered) and not the repack's Frida gadget (OVRPort's
+`patch_clean_up_frida` removes its loadLibrary). It **leaks ~430 GPU mappings (/dev/dri/renderD128) and ~20 MB a
+second** (6.5 GB + swap after 5 min, then 26 fps): page-fault stacks (perf -e page-faults, offsets resolved with the
+process maps + vrclient.so's own symbols; its text segment is at file offset + 0x4000) end in SteamVR's runtime:
+`xrBeginFrame → CSxrCompositorOpenVR::BeginFrame → SubmitExplicitTimingData → CVRCompositorSharedTextures::
+BeginGPUTimingCommandBuffer` and `xrEndFrame → CVRCompositorClient::SubmitWithArrayIndexAndTime`. Ruled out: the
+layer color scale/bias + image layout structs (FrameBridge `strip_color_bias` 1/2, diagnostic), Valve's Vulkan
+layers (VK_INSTANCE_LAYERS=""), array swapchains in general (Lucky's Tale/I Am Cat flat). Kernel tracepoints aren't
+allowed for steamos. FrameBridge: `layer_debug` logs xrDestroySwapchain and per-5 s xrBeginFrame/xrEndFrame counts;
+`frame_balance` (ends an open frame before the next begin) exists but Vader never leaves one open. Next (built,
+not yet run: the Frame slept): `layer_debug` also counts xrAcquire/Wait/ReleaseSwapchainImage per 5 s (hooked only
+with layer_debug, after the other conditional hooks) to see whether Vader skips a wait or release: it doesn't (361/361/361 per 5 s).
+FrameBridge `snapshot=N` (`snapshot_gl.c`, GLES): every N s the left-eye image the game submits is read back on its
+own context and saved as `files/fb_snap_0-7.ppm` (quarter size) — headless launches show a black headset view, this
+shows what the game draws. Vader: Lucasfilm logo (an OBB mp4: video works), then its loading card (portrait + segmented
+bar) that never advances; the async loader thread sleeps and OBB reads stop (~168 MB of a 2.7 GB pak).
+**Lepton's logcat mirror dies (agent v67, 2026-10-09):** occasionally launch.log ends with `logcat: Unexpected EOF!` right after the game starts (about 1 launch in 50, Lepton 2.8.14 and 3.0.5): no dashboard auto-hide, no launch-test result. launch.sh's `_logcat_keeper` then reads `podman exec lepton-steamlaunch-<appid> logcat` itself into launch.log (up to 5 restarts while the game runs).
+**Double launch (agent v57, 2026-10-06):** a second Play while Lepton still boots (~10 s with nothing to see) made
+the second Lepton stop the first one's container ("Waiting for steamlaunch-<appid> (PID …) to exit", exit 137
+"(starting)", "Clearing baked app data due to early exit") and both died (Vader, BattleSisters). launch.sh now takes
+`flock` on `<base>/.launch.lock` (fd 9, inherited by Lepton; the watchdog and dashboard helpers close it with
+`9>&-`); a second launch exits 0 and logs to `<base>/launch-dup.log`. `upgrade_launchers` adds it to existing
+launchers. Verified on the device (second launch during boot: ignored, the first kept running). Vader on its loading
+card ignores input too (owner pressed/held every button: presses reach the runtime, the card never changes).
+**Issue triage round (2026-10-06, owner's headset):** vibration in OVRPlugin games = 2 s vibrations updated per frame and
+stopped with amplitude 0; FrameBridge turns amplitude 0 into xrStopHapticFeedback (else each buzz ran 2 s), haptic_fix
+uses the envelope RMS (was its peak), per-game `haptic_scale` → Creed/The Boys/Jurassic World fine. Lambda1VR (TBXR):
+loader named by Build.MANUFACTURER (`frame.tbxr_vendor`), no graphics extension enabled (FrameBridge adds
+XR_KHR_opengl_es_enable + asks for the requirements on -50), always multisampled render-to-texture (GL shim gives
+single-sampled stand-ins when GL_EXT_multisampled_render_to_texture is hidden) + its xash/ data → works. Jurassic World:
+`frame.vrapi_stub`. Metro Awakening: contributor's vkshim fixes + hide_space_warp + no VALVE_rpo (jumping polygons like
+ITR2). Pinball FX VR: hide_space_warp (stutters). Eleven: a Meta online request fails after platform init → needs Meta
+services. Star Wars Tales: top half black + freeze after loading; ruled out: asset-file paks (never requested), Valve
+foveation (off: no change), GL errors (MESA_DEBUG=1: none), EGL_BAD_ACCESS once in OVRPlugin init (harmless); the game's
+eye image reads back black. BlazeRush: VrApi bridge exports + ovr*_ToString stubs + avatar stub get it to the menu room
+at 72 fps, full input reaches it (diagnostics `input 5s`: Touch type only, sticks 1.0, buttons, poses 0x8f), but the room
+draws no controllers and ignores input; avatar loader forced to its "Failed" path (no logged-in user) changed nothing.
+`frame.ovr_trace` can't trace Unity games (P/Invoke dlsym; nothing imports ovr_*). Headless: the VrApi bridge's 30 s
+head-pose deadline ends VR mode without a worn headset (not a game bug).
 **Lepton storage (2026-09-30):** each app's /sdcard (= /storage/emulated/0 → `<base>/lepton-data/external`) has `Movies`/`Download`/`Documents` symlinked to the Frame's `~/Videos`/`~/Downloads`/`~/Documents` (liblepton/mounting.sh, only if they exist at start); agent v24 `storage_targets` reads that mapping. Android's MediaProvider canonicalises paths to /home/steamos/... and rejects every file ("doesn't appear under [/system/media...]"), `sm list-volumes` is empty: the media index never works, apps must browse folders. Lepton installs with `adb install -g` (runtime permissions granted, MANAGE_EXTERNAL_STORAGE too). Files: `install/files.py`, `frameport frame send|storage`, GUI Files tab (formerly Frame → Send files).
 **SteamVR per-app settings (2026-09-30):** editing steamvr.vrsettings while SteamVR runs is lost; the web API (127.0.0.1:27062 /app/setsettings) needs `x-steamvr-secret`. `native/vrsettings` = `fp_vrsettings.exe` (freestanding, OpenVR `FnTable:IVRSettings_003` as a Utility app, loads SteamVR's bin/win64/openvr_api.dll) sets them live and SteamVR persists them: section `steam.app.<shortcut appid>`, keys `preferredRefreshRate` (float) and `motionSmoothingOverride` (0 global, 1 on, 2 off, 3 always). Steam Link (vrlink) lists the Frame's rates 72/80/90/96/108/120/144 in vrserver.txt and follows the per-app preference ("host preferred N Hz"; whether the key is honoured is unverified in-headset yet). Judder metric: vrcompositor.txt session summary dropped + "Timed out. N total" (Stormland: 0 dropped but 313 timeouts in 2 min); fpsVR (`%LOCALAPPDATA%\fpsVR\*.json`, 0.1 ms histograms) gives p99 CPU/GPU ms. `pcvr.steamvr_tuning` (default on, PC only) applies on Play: highest rate whose budget ≥ p99×1.05, at least one step down, smoothing on.
 
 **Language packs (merged from PR #20, 2026-10-04):** overport's `libovrplatformloader.so` is a dispatcher that `dlopen`s Meta's own loader (`libovrplatformloader_meta.so` / `_meta_q1.so`, also `libpxrplatformloader.so`) and keeps its own message queue; `ovr_LanguagePack_GetCurrent/SetCurrent` are 8-byte `return 0` stubs in it, `ovr_AssetFile_GetList` forwards to Meta's loader. `frame.langpacks` (opt-in, `native/langpack`) serves `<tag>.lang` files from the game's data; `elf.hide_exports` marks the loader's exports STB_LOCAL (bionic and glibc only match GLOBAL/WEAK; verified for glibc, bionic's `is_symbol_global_and_defined` is from memory). `libfp_langpack.so` is built here (`python native/build.py --only langpack`) and committed. Owner-verified 2026-10-04: Deadpool VR with only `en.lang` and the patch on plays English dialogue and runs normally (headless launch tests show 2-6 fps while it loads: not a regression sign). A dispatcher answer that arrives after we answered the timed-out GetList is dropped (one answer per request); games already in a library get `lang_packs` filled after an app update (`library._refresh_data_fields`). The library logs to logcat under the tag `fp_langpack` (dirs looked in, packs found, every language-pack call), so it shows up in the game's `launch.log`; an `ovr_AssetFile_GetList` the dispatcher leaves unanswered for 1.5 s is answered with our packs alone. Deadpool VR (Unreal) accepts a pack only when its `Metadata` equals the game's own version string (`ULanguagePacksSubsystem` compares it with `%s.%s.%s.%s.%s` built from the build info, e.g. `1.0.40.356975.Quest` = versionName; found by disassembling `libUE4.so`): the patch writes the APK's versionName into the library (`@FPMETA@` slot, `with_metadata`), `FRAMEPORT_LANGPACK_META` overrides it. Deadpool VR (2026-10-04, headset): German became selectable with that Metadata, but dialogue stayed silent (even English once reported as a pack) while the path was spelled `/sdcard/Android/obb/<pkg>/x.lang`; with the `/storage/emulated/0/Android/obb/<pkg>/x.lang` spelling (Unreal's own, now listed first in `scan_dirs`) German dialogue plays. `FRAMEPORT_LANGPACK_SKIP=<tags>` or a file `fp_langpack_skip` in the obb folder leaves packs out of the list (experiments).
 
+**Cube swapchains (GitHub #107, 2026-10-09):** the Frame's runtime refuses `faceCount=6` swapchains (-2,
+XR_ERROR_RUNTIME_FAILURE); OVRPlugin ignores that ("CreateSwapchain for eye 0: 0x0, 0 stages") and crashes in
+ovrp_EndFrame4 (memset). FrameBridge `cube_standin` (default on, `native/adapter/cube_standin.c`) serves a refused cube
+swapchain as one GL cube-map texture in the app's context (GLES only) and drops its layers. Verified headless with
+Budget Cuts Ultimate (2048² sRGB, 12 mips; runs on at ~70 fps); what the cube layer showed is simply missing.
+**Vivox API 31 (GitHub #101, 2026-10-09):** newer Vivox builds (Green Hell VR) call Android 12 AudioManager
+communication-device methods from `com.vivox.sdk.AudioChangeListener` with no SDK check → NoSuchMethodError on Lepton's
+Android 11. `frame.vivox_audio_route` (analysis `vivox_api31`, ANALYSIS_VERSION 4) makes every such method return at
+once (`Dex.return_early`: return-void / `const/4 v0,0; return v0`; nopping the invoke would leave a move-result the
+verifier rejects). Older Vivox (Eleven Table Tennis, BattleSisters) lacks that code and isn't matched. Verified
+headless: Vivox initialises, 150 s at ~65-70 fps.
+**Multiview programs on flat framebuffers (GitHub #77, Doom3Quest, 2026-10-09, prototype):** Mesa enforces OVR_multiview's
+"program num_views == draw framebuffer views" rule (`draw_validate.c`, the draw is dropped silently); Qualcomm doesn't.
+Doom3Quest compiles every VS with `layout(num_views=2) in;` and draws its HUD/PDA into 2D-texture FBOs → black. Opt-in
+`frame.gl_multiview_fbo` (analysis `gl_multiview_libs`, ANALYSIS_VERSION 6; own-engine GLES only): `native/glmv` =
+`libfpglmv.so` (12 chars = "libGLESv3.so": libdoom3.so's one `.rodata` dlopen string is rewritten in place, its qgl*
+table comes from dlsym on that handle; also first DT_NEEDED for its direct gl*/egl* imports). Such draws use a lazily
+built single-view twin (view 0, uniforms copied per draw); eglMakeCurrent resets the per-thread cache. Host-tested only
+(rewriter on all 19 Doom3Quest shaders + glmv.c against a stand-in GL, `tests/test_gl_multiview_fbo.py`); the host's
+Mesa 23.2 llvmpipe has no OVR_multiview, so no real-driver test yet. Not in the catalog until a headset test.
 **Unresolved (as of 2026-09-28):** Arcsmith (right-eye distortion) and Time Stall (both eyes) — swap, tracking, Valve
 layers, depth, pacing ruled out. Sniper Elite VR (DEVICE LOST), Espire 1 (Mesa GL upload crash), HITMAN 3 (freedreno
 crash): use PC versions.
 
+**Install links / FrameDrop button protocol (2026-10-07, not yet clicked end to end from a browser):** FrameDrop
+(framedropvr.com, a closed-source Windows sideloader) defines "Install with FrameDrop" buttons:
+`https://framedropvr.com/install?manifest=<url>|url=<file>` → that page opens `framedrop://install?…` (1.6 s, else its
+home page); manifest `{"schema":"framedrop.install/v1","name","files":[{"url","sha256"}]}` (name = Steam title; .apk
+or Linux .zip). `deeplink.py` (no Flet) parses framedrop://, frameport:// and the pasted https link, enforces its
+rules (https; http only on loopback; no credentials; no LAN/loopback/link-local IPs, also after DNS and redirects; URL
+ends in a file name), caps manifests at 256 KiB, ignores non-hex sha256 (FrameDrop's own example has a placeholder),
+downloads into `<data>/downloads/<slug>-<hash>/` (OBBs → `obb/` next to the APK, `.part` removed on cancel/mismatch);
+`pipeline.add_from_link` routes APK / Linux / exe and sets `title` + `title_locked` + `link` (a bare file link keeps
+FramePort's title). GUI: `views/link_dialog.py` (always asks first), Add games → "Install from a link…", CLI
+`frameport open-link [--yes --no-install --gui]`. **A `flet build` bundle can't take a URL argument** (the Flutter
+host treats any argv as a developer page URL), so `urlhandler.py` registers a script, not FramePort.exe: Windows
+HKCU `Software\Classes\{framedrop,frameport}` → hidden PowerShell `frameport-link-handler.ps1`; WSL (source runs)
+the same keys → `wsl.exe -d <distro> -e sh frameport-link-handler.sh`; Linux `frameport-links.desktop` +
+`xdg-mime`; macOS unsupported (Apple Events, paste instead). The script drops the link into `<data>/links/*.link`
+and starts FramePort unless `<data>/gui.alive` is < 10 s old (`gui.starting` stops double starts); the GUI's
+`_watch_links` thread touches the heartbeat and opens links (newest window session). Settings → Install links: one
+switch per scheme (`links.framedrop`, `links.frameport`, default on); a scheme another program owns (FrameDrop) is
+only taken with "Use FramePort for these links" (`register([s], force=True)`); off removes only FramePort's own
+registration (`MARK` in the command). Never registered with FRAMEPORT_HOME/FRAMEPORT_NO_LINK_HANDLER (tests,
+screenshots). Same round: files dropped on the Library (`ui/dropped.py`, bundles only like the Files tab), "Add a
+Windows program (.exe)…" (`pipeline.add_windows_exe`: exe in Downloads/home/drive root copied alone into
+`<data>/windows-apps/<slug>/`), patch `device.display_mode` (Automatic / VR / Flat window → `InstallContext.display`,
+`installer.show_window`). FramePort-only manifest extension `"frameport": {"description", "icon"}` (bad values ignored; icon: same URL rules,
+≤2 MiB, Pillow-checked, ≥32 px, saved as PNG in `<data>/downloads/icons/`, shown in the question by asset URL, then
+`sources.apply_custom(pkg, "icon")` unless `.picked` exists; description fills `details.description` only when
+empty). Bare file links get a title guessed from the file name (`title_from_filename`: version/arch dropped, package
+names → last part). Windows test of 0.12.1.dev191 (2026-10-07): a button click opened the dialog; but a click right
+after closing FramePort did nothing (the closed window's heartbeat was < 10 s old) → the handler scripts now wait
+up to 4 s for the link file to be taken before trusting the heartbeat, the window's CLOSE event / atexit delete
+`gui.alive`, and the Windows command runs under `conhost.exe --headless` (plain `-WindowStyle Hidden` flashed a
+console). Screens: `scripts/ui_smoke.py --links --fake-frame --game <pkg>` (tall pages: `--viewport
+1280x7000`; Flutter's popup menu ignores Escape).
+
 ## Releases, CI, GitHub
 Maintainer-only notes (accounts, credentials, key locations) live in the git-ignored `CLAUDE.local.md`.
 Public repo `github.com/spoopyghosty0/frameport` (branch `main`). Push a `v*` tag → CI (`.github/workflows/build.yml`)
@@ -510,6 +712,12 @@ tests, builds Windows x64 / macOS arm64 / Linux x64 bundles, signs, attests and
 `FramePort-selfsigned.cer`; notes = "What's new" from the annotated tag message + the short `packaging/release-footer.md`; owner: keep release
 notes short — a few "What's new" bullets, nothing long after them).
 Installed apps find the release themselves (self-update), so the notes are what users see in the update dialog.
+- **Dev builds (for testers, no release):** Actions → build → Run workflow (main), "dev" ticked, optional "notes"
+  (what to test). The bundles get version `<next patch>.dev<run number>` (`scripts/dev_version.py`, not committed) and
+  replace the rolling `dev` pre-release (`dev-release` job; same assets + SHA256SUMS). Automatic update checks ignore
+  pre-releases; testers use Settings → Updates → "Install the latest dev build…" (`updates.check_dev`,
+  `Updater.install_dev`). `parse_version` sorts 0.9.0 < 0.9.1.devN < 0.9.1, so testers get the next release normally.
+- **Upstream trackers:** issues labelled `upstream` (#73 microphone, #74 haptics, #75 VrApi bridge) list our workarounds for OVRPort bugs and how to drop them; check them against OVRPort's latest release before each release.
 - **Release checklist:** bump `src/frameport/_version.py` (the only version; `scripts/package.py` fails a tag build
   whose tag ≠ `v<_version>`), commit, `git tag -a vX.Y.Z -m "FramePort X.Y.Z" -m "<What's new, Markdown bullets>"`,
   push the commit and the tag. Never publish a release without its `SHA256SUMS.txt` (the updater refuses it) and keep
@@ -525,6 +733,11 @@ Installed apps find the release themselves (self-update), so the notes are what
   Windows console) plus PYTHONUTF8; macOS builds need `--python-version 3.12 --arch arm64` (cryptography has no wheels
   for flet's default Python / x86_64 cross-build), with a PyInstaller fallback step; `astral-sh/setup-uv` has no
   floating major tags after v7 → pin the exact version; force-moving a tag starts duplicate runs (cancel one).
+- `jni` (2026-10-06): jni_flutter 1.0.4/1.0.4+1 generate bindings that require jni ^1.1.0 while Flet's build template
+  pins jni 1.0.0 → every `flet build` bundle failed (`JniVersionCheck`, "generated bindings expect package:jni
+  ^1.1.0"). pyproject `[tool.flet.flutter.pubspec.dependency_overrides] jni = "1.1.0"` fixes it (pinning
+  jni_flutter 1.0.4 does not); drop it once Flet's template moves to jni 1.1. A failed tag build publishes nothing:
+  delete and re-push the tag on the fixed commit.
 - macOS runner (2026-10-02): `macos-latest` jobs went unassigned (cancelled after 15 min, no steps); `macos-15`'s Xcode
   16.4 fails a Flutter plugin (`NWPath has no member`); `macos-26` (Xcode 26) builds with `flet build`. The PyInstaller
   fallback (`package.py --pyinstaller`) passes `--yes` so a failed `flet build`'s folder doesn't stop it at a prompt.

README.md

@@ -22,12 +22,21 @@ Install games that target the Meta Quest, Android, or general PCVR onto your **V
   [What it changes](docs/FRAME_SETUP.md).
 - **Type on Frame:** use your computer's keyboard on the Frame: in VR apps, Android apps, Steam and the desktop.
   [More](#type-on-frame).
-- **One click per game:** convert, patch, sign, upload, add to Steam with artwork, launch test.
+- **One click per game:** convert, patch, sign, upload, add to Steam with artwork, launch test. Artwork that can't be found automatically can be picked from the stores or replaced with your own images.
 - **Per-game recipes:** a tested catalog plus detection rules; every patch explained in plain words.
 - **FrameBridge:** FramePort's OpenXR adapter emulates what the Frame natively lacks (passthrough, room, controller models,
   curved and 360° layers); game settings as simple switches.
 - **Beyond Quest:** Android apps as windows, PC VR via Proton or Revive, Windows (non-VR) games via Proton, a Files
   tab with drag and drop.
+- **Linux apps:** install Linux apps (AppImage, a folder, or a zip/tar archive) on the Frame with a Steam
+  shortcut; arm64 builds run natively on SteamOS, x86_64 builds through Valve's FEX translator.
+- **Install links:** "Install with FrameDrop" buttons on web pages (the one-click protocol of the FrameDrop
+  sideloader) and pasted links open in FramePort, which asks, downloads, adds and installs the build.
+- **Screenshots tab:** the screenshots you took in the headset, sorted by game (matched by play time) and day;
+  view them and download them to your computer.
+- **Live view tab:** watch what the headset shows, with sound, in a browser window on your computer.
+- **Monitor tab:** the running game's frame rate, the Frame's load, temperatures, power and battery live, and its
+  processes, which you can end. [More](#monitor).
 - **Self-updating** releases, redacted diagnostics, one-click problem reports and working-config sharing.
 
 ## Quick start
@@ -48,14 +57,15 @@ Install games that target the Meta Quest, Android, or general PCVR onto your **V
 3. **Add games → Scan a folder** with your game backups (APK + OBB, or PC VR game folders).
 4. Open a game → **Install on Frame**, then play it from the Frame's Steam library.
 
-Full guide, firewalls and troubleshooting: [docs/INSTALL.md](docs/INSTALL.md).
+Full guide, firewalls and troubleshooting: [docs/INSTALL.md](docs/INSTALL.md). Questions (e.g. how to lay out games
+with OBB files): [docs/FAQ.md](docs/FAQ.md).
 
 ## Type on Frame
 
 Typing in VR is painful, so FramePort turns your computer's keyboard into a keyboard for the Frame. Open **Type on
-Frame** (keyboard icon on the sidebar's Frame card, the Steam Frame page, or a game's menu), select a text field in
-the headset and type: searches, logins, chat, in any app, in Steam or on the desktop. Paste longer text to type it in
-one go. Nothing to install: FramePort adds a virtual keyboard on the Frame while the window is open, without root.
+Frame** (its own tab in the sidebar), select a text field in the headset and type: searches, logins, chat, in any
+app, in Steam or on the desktop. Paste longer text to type it in one go. Nothing to install: FramePort adds a virtual
+keyboard on the Frame while the tab is open, without root.
 
 ![Type on Frame](docs/images/type-on-frame.png)
 
@@ -63,6 +73,35 @@ Unity apps whose text fields close the moment you select them on the Frame (no s
 fix, so Steam's on-screen keyboard and Type on Frame work in them too.
 [Details](docs/INSTALL.md#typing-on-the-frame).
 
+## Screenshots
+
+Screenshots you take in the headset show up in FramePort's **Screenshots** tab, grouped by day and matched to the game
+you were playing. Open one full size, step through them, and download single shots, a selection or all of them to
+your computer.
+
+![Screenshots](docs/images/screenshots.png)
+
+![Screenshot viewer](docs/images/screenshot-viewer.png)
+
+## Live view
+
+The **Live view** tab streams what the headset shows, with its sound, to your computer: click **Start live view** and
+it opens in your default web browser (full screen with a double-click; click **Sound on** to hear it, as browsers start
+videos muted). Pick 360p to 1080p, or the headset view's full size. The picture comes from SteamVR's built-in headset
+view on the Frame and is encoded there while you watch (about one CPU core), so stop it when you're done. It's black
+while the headset sleeps.
+
+## Monitor
+
+The **Monitor** tab shows what the Frame is doing while it's open: the running game with its frame rate against the
+display's refresh rate, CPU, graphics chip, memory, the hottest temperature with the fan speed, power draw and battery
+time left, each with a 2-minute chart. **Show details** adds every CPU core, all temperature sensors, where the power
+goes and the network. Below, the game's processes (or Steam's, or all of them) with their CPU, GPU and memory use:
+right-click one to end it, or end the whole game. Programs that Steam, SteamVR or the desktop need are marked and ask
+again. The Frame sends the numbers itself (about 1 % of one CPU core) and stops when you leave the tab.
+
+![Monitor](docs/images/monitor.png)
+
 ## Compatibility
 
 If a game has already been tested with FramePort, it will automatically use the optimal game config. Otherwise, FramePort

artifacts/SHA256SUMS

@@ -1,14 +1,19 @@
-48a3ecad77ec0f3215b29070e994590eb9579e04d3c88a47f37f306f9aeb01d9  ./arm64-v8a/libfp_langpack.so
-a5b03bb7ae5d953d7ded2bf117b0a19c57fae604f16f54310847f8e89593dde6  ./arm64-v8a/libfp_ovrp.so
-6d2b9f8cea2f2cf33b8ff30d29a2f3d9c4d55549260a867168a24e44abada021  ./arm64-v8a/libfp_vk.so
-8e00552d1ab90f82749db3caad4f773351fa8a28edcc5ea5cbd1b31c434ff32a  ./arm64-v8a/libframe_xrshim.so
-3dfcb0f2bec47857bcecc7261c58e076d872d4649718c40850f29e10c75477dd  ./arm64-v8a/libglshim.so
-507bb1c62168da9335a5883ec264aabed2ce09d04b6524e67be504a273473f8d  ./arm64-v8a/libopenxr_loader_generic.so
+5becb96ee86fbda0ce98c0e0fd064f8ba092314aceaa400e3dcc785705dc3c23  ./arm64-v8a/libVkLayer_fp_shaderfix.so
+e7554c6343ee2989b0a273ee6230e65c25bfe6499eefd00de19f5f0fee58754f  ./arm64-v8a/libfp_langpack.so
+321da502e0f8f46f0880aad39fe6b84bdef88f925164568814cf704a1b31a577  ./arm64-v8a/libfp_ovrp.so
+40defdaddcda53bd2649eb48076fae1622bfc2bfc88e9e03c94fc8b45af2a4f2  ./arm64-v8a/libfp_ovrtrace.so
+7522a7cfb236e48d3442d418c4820cd37760a9627c6bdef80fb0df82df5fd826  ./arm64-v8a/libfp_vk.so
+383054f8b3b41dde76d062c71856cd3163655e50009c08454bc1793f393ead65  ./arm64-v8a/libfpg.so
+5432674a59d02f411cd853a5dc57e3fa547d1ac518f25bf433fc54c43677177a  ./arm64-v8a/libfpglmv.so
+8a8f6b1da8952cb3933a5b53558424a5fc56043b2527a16bb6dd62a00d2de01a  ./arm64-v8a/libframe_xrshim.so
+fc559dbe0b87eecc3641256837293260cefb7c2ce7b21d808d10edd2a2dba9fc  ./arm64-v8a/libglshim.so
+13137a4dea2567c3c43081a24c220e1070e4f0d8a52c8c936a4926e8edd05792  ./arm64-v8a/libopenxr_loader_generic.so
 1feaeafad467c4cafdf2b018a4d84b0bee200c3f711697b4ce97e66a3ba256ca  ./arm64-v8a/libovrplatformcompat.so
-32525cd0a9ee3d9993d8871cd6905bdcf22cde4f4ba28f5db6434ce7d6554758  ./arm64-v8a/libvrapi.so
-11b7019c6a8d3b2f0f89cf23011f84bbbcb8e907f0935978e1df675339abbb6e  ./armeabi-v7a/libopenxr_loader_generic.so
+aa4dc0020c77e12d41ef6ce80b23ad90c9cb7e882338eddf2261efe8645cf38d  ./arm64-v8a/libvrapi.so
+0ed9f3509498871d7ac5d9c10cd4063f7d02f70179fd5f0f7260c323938e783d  ./armeabi-v7a/libopenxr_loader_generic.so
 1871eae093432d277da4bc751bf5f3269dfcf11f9168260b0c3caadb0dedb19d  ./dex/oculusos-stubs.dex
 1aa733117cf57ccff7cf23f0425dbfd73b0332a3ef1c905ceeca0ccd0449c4e0  ./linux-arm64/XR_APILAYER_FRAMEPORT_timefix.json
 28c2430a02bbd8902c5bfb9562c6fd0e318654f9e05c095bfeb94b0450ab1b07  ./linux-arm64/libxr_frameport_timefix.so
+b10b3a5c10c3339fc63fd9f6cb4d01ea29be11a863d0ebad1389ea69fd471940  ./linux-arm64-bin/fp_venc
 c2c70f4af1a5c3e6089dff1130161dd417f8044f99ec639eeecf1083930aab16  ./win-x64/fp_oculushmd.exe
 60ebc5fea05b8945082e2ca8b9f2eb74616012a26eb50133af273dff0fcddc42  ./win-x64/fp_vrsettings.exe

catalog/games/com.Aldin.WotW.yaml

@@ -0,0 +1,21 @@
+package: com.Aldin.WotW
+title: 'Waltz of the Wizard: Extended Edition'
+status: works
+notes: From what I tested, it just works. My only complaint is that the haptics go pretty crazy. But I don't remember
+  what it was like when I played it in my Quest. So it could be fine. 100% playable.
+tested_version: 5.0.8.1578
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-05'
+  known_good_sha256: 522cfebf954e1cab6054798479b0b32c5ba9e38cca83dd98db2ac0f7e3c0802a
+  app: 0.9.1
+  overport_cli: 1.2.5
+  frame_build: '20260922.6101926'
+  agent: 48
+  issue: 44
+source_hint: WotW

catalog/games/com.CMGames.IntoTheRadius2.yaml

@@ -0,0 +1,36 @@
+package: com.CMGames.IntoTheRadius2
+title: Into The Radius 2
+status: works
+notes: Plays well (owner-verified 2026-10-05). Space warp is off, the headset's brief focus losses are hidden
+  (focus_hold, up to 2.5 s), only Valve's foveation layer is loaded (its render-pass optimizer removed the fog) and
+  an invalid depth resolve in Unreal's render passes is dropped (vk_spec_fixes; it made models flicker and windows
+  show behind them). Needs FramePort 0.10.0 or newer. Loading a save can take over a minute.
+details: Unreal Engine 5 game that uses Meta's Application SpaceWarp (extra motion-vector and depth swapchains). OVRPort's
+  patch_disable_space_warp doesn't reach Unreal Engine 5, so FrameBridge's hide_space_warp hides XR_FB_space_warp and
+  removes the space warp info from the eye images. Working config shared in GitHub issue 35. In the headset
+  (2026-10-05) the Frame dropped focus for 0.4 s and 1.0 s within ten seconds and Unreal paused each time; loading a save
+  shows no frames for 40-80 s while the game's Sentry SDK (debug mode) logs its breadcrumbs. Valve's VALVE_rpo
+  (render-pass optimizer) Vulkan layer removes the game's fog (owner-verified 2026-10-05; with only VALVE_fdm_injection
+  loaded the fog renders), which also hid the distance culling; ruled out for the remaining pop-in - Vulkan occlusion
+  query slots, Valve's FDM layer. The cause, found with Khronos' validation layer (vk_validation) - Unreal's render
+  passes use Qualcomm's shader resolve (VK_SUBPASS_DESCRIPTION_SHADER_RESOLVE_BIT_QCOM) together with a depth resolve
+  of a single-sampled depth attachment (VUID-VkSubpassDescription2-flags-04908, -03179), harmless on Quest's driver,
+  wrong depth on the Frame's Mesa; the Vulkan shim's vk_spec_fixes drops that resolve.
+tested_version: 1.2.4
+engine: Unreal
+xr: OpenXR
+alt_overport:
+- patch_remove_unreal_force_quit
+adapter:
+  equirect_emul: 1
+  hide_space_warp: 1
+  focus_hold: 1
+  focus_hold_ms: 2500
+  vk_spec_fixes: 1
+lepton_env:
+  VK_INSTANCE_LAYERS: VK_LAYER_VALVE_fdm_injection
+verified:
+  date: '2026-10-05'
+  issue: 35
+min_app: 0.10.0
+source_hint: Into The Radius 2

catalog/games/com.CortopiaStudios.Graves.yaml

@@ -0,0 +1,19 @@
+package: com.CortopiaStudios.Graves
+title: GORN2
+status: works
+tested_version: 1.10.1
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-07'
+  known_good_sha256: d8a7949edc90c19902eb89f888ad6a350475387d630991767b3097667ad16d4c
+  app: 0.12.0
+  overport_cli: 1.2.5
+  issue: 88
+source_hint: GORN 2

catalog/games/com.CyberneticWalrus.DoesitStackMeta.yaml

@@ -0,0 +1,24 @@
+package: com.CyberneticWalrus.DoesitStackMeta
+title: Does it Stack?
+status: issues
+notes: Mixed reality mode does not work (works on Demeo), everything else seems to be OK
+tested_version: 1.02 (3683)
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.oculusos
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+  refresh_rate: 90.0
+verified:
+  date: '2026-10-09'
+  known_good_sha256: e9fce6ac812f1bb317a7a6959be89c5ff54e87f56af9ad4c42dff5fecad4efe8
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 112
+source_hint: Does It Stack

catalog/games/com.FireproofStudios.TheRoomVR.yaml

@@ -0,0 +1,25 @@
+package: com.FireproofStudios.TheRoomVR
+title: The Room VR
+status: works
+notes: Plays normally (it used to stay on a grey screen).
+details: Unity 2018.4 with built-in Oculus support. It started VR only with frame.unity_oculus_check, then Unity's
+  render thread crashed in the GL driver (Zink) when OVROverlay copied a 4x4 fade texture into its overlay layer;
+  frame.unity_no_overlay_copy skips that copy (the fade still works). frame.unity_runtime_msaa_off keeps the eye buffer
+  at one sample (also GitHub issue 38).
+tested_version: '1.02'
+engine: Unity
+xr: VrApi
+frame:
+- frame.unity_no_msaa
+- frame.unity_oculus_check
+- frame.unity_text_input
+- frame.unity_runtime_msaa_off
+- frame.unity_no_overlay_copy
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-05'
+  issue: 38
+updated: '2026-10-05'
+min_app: 0.11.0
+source_hint: The Room VR

catalog/games/com.ForwardXP.nuke.yaml

@@ -0,0 +1,20 @@
+package: com.ForwardXP.nuke
+title: Please Don't Touch Anything
+status: works
+notes: Seems functional
+tested_version: '2.2'
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-08'
+  known_good_sha256: 17460c8691b9ff82f6c7ca5597afd0aacf1a94aa30ebb6a6108802991b60f51b
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 106
+source_hint: apks

catalog/games/com.FourPlayersStudio.Retronika.yaml

@@ -0,0 +1,21 @@
+package: com.FourPlayersStudio.Retronika
+title: Retronika
+status: works
+tested_version: 3.2.601
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-07'
+  known_good_sha256: 290bfda3969547d5f1ff621ab5a8be9dd322fc9eee6b243c863576d4ff5b4b81
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 97
+source_hint: Retronika

catalog/games/com.FunktronicLabs.TheLightBrigade.yaml

@@ -0,0 +1,21 @@
+package: com.FunktronicLabs.TheLightBrigade
+title: The Light Brigade
+status: issues
+notes: Judder in weapons
+tested_version: '746'
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-09'
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261007.6125817'
+  agent: 59
+  issue: 114
+source_hint: The Light Brigade

catalog/games/com.ILMxLAB.VaderImmortal.ep1.yaml

@@ -0,0 +1,36 @@
+package: com.ILMxLAB.VaderImmortal.ep1
+title: 'Vader Immortal: Episode I'
+status: works
+notes: 'Plays (owner''s headset test): loading card, grip/trigger, hands and the lightspeed sequence fixed. Thumbs
+  follow the touches with frame.unreal_thumb_touch (Klownicle''s engine fix).'
+details: Unreal Engine 4 (GLES). Found and verified in gameplay on a Frame by Klownicle (GitHub issue 49); FramePort
+  reimplements them as patches that match the game's code exactly and change nothing when it differs. The engine's
+  Quest checks (IsRunningOnSantaCruz) answer "not a Quest" on the Frame - the menu waited for a Quest-only shader
+  precompile that never starts (frame.unreal_quest_precompile makes the non-Quest branch report 100 %), and the
+  game's key map picked the empty Gear VR controls (frame.unreal_quest_keymap keeps the Quest set). Two lightspeed
+  shaders, as the Frame's GL driver (Zink) compiles them, read loop counters and accumulators before setting them
+  and hang the GPU; a Vulkan layer under Zink inserts the stores that zero them (frame.zink_shader_fix, zink_shader_fix;
+  the captured modules are from Lepton 2.8.14 and stop matching if a Frame update changes the driver's output -
+  the layer logs that). OVRPlugin asks for poses at its own clock (pose_time_fix). Unreal's Oculus input animates the
+  thumbs from near-touch, which the Frame never reports (frame.unreal_thumb_touch reads the touches instead; binding
+  the proximity to the touch inputs in FrameBridge didn't reach the game). The Frame's SteamVR runtime
+  leaks about 20 MB a second while the game runs (reported to Valve).
+tested_version: 1.1.1+667256.cl.387770
+engine: Unreal
+xr: VrApi
+alt_overport:
+- patch_remove_unreal_force_quit
+frame:
+- frame.unreal_quest_precompile
+- frame.unreal_quest_keymap
+- frame.unreal_thumb_touch
+- frame.zink_shader_fix
+adapter:
+  pose_time_fix: 1
+  zink_shader_fix: 12016:b2919629761ad268e0b21c72ac8520f81b76e72c3adc26897f97eae9a3e70a66:3092:0x0003003e,166,82,0x0003003e,177,82,0x0003003e,183,82,0x0003003e,189,82,0x0003003e,256,82,0x0003003e,266,82,0x0003003e,272,82,0x0003003e,278,82,0x0003003e,318,82,0x0003003e,328,82,0x0003003e,334,82,0x0003003e,340,82;11436:6f18be49f2aaa2452f962eb16f7af744c5c22a7b25f37ce681e0d6399e35a869:2932:0x0003003e,164,80,0x0003003e,175,80,0x0003003e,181,80,0x0003003e,187,80,0x0003003e,254,80,0x0003003e,264,80,0x0003003e,270,80,0x0003003e,276,80,0x0003003e,316,80,0x0003003e,326,80,0x0003003e,332,80,0x0003003e,338,80
+verified:
+  date: '2026-10-09'
+  issue: 49
+updated: '2026-10-09'
+min_app: 0.12.1
+source_hint: Vader Immortal- Episode I

catalog/games/com.JustAddWater.SniperEliteVR.yaml

@@ -4,14 +4,25 @@ tested_version: '1.03'
 source_hint: Sniper Elite VR
 engine: Unity
 xr: VrApi
-status: unsupported
-notes: 'GPU hang (zink: DEVICE LOST) even with MSAA off.'
-details: Legacy VrApi via OVRPlugin.
+status: works
+notes: Plays with controllers that follow the hands (owner's headset test, Quest 1 build 35713).
+details: 'Unity 2019.4 on its built-in Oculus VR (no Oculus XR Plugin). Its legacy frame loop never waited for frames
+  (GPU hang, zink: DEVICE LOST) and Unity reported only Go controllers: frame.unity_oculus_check. Its frame wait then
+  deadlocked at the Init scene (Unity skipped beginning a frame) and the physics-step pose update located the
+  controllers in the past (hands lagged): both fixed in that patch (revision 5), switched on for this game by ovrp_begin_gate and ovrp_hold_physics. Grabbing an object in the tutorial
+  vibrates the controller; OVRPort''s envelope conversion then allocated ~1 GB/s until the memory cap ended the game:
+  haptic_fix. The Quest 1 build has no arraysources_assets.hd, which the game loads on the Frame (it detects a Quest
+  2) and then skips the .sd bundle: textures are missing unless the .sd file is also present under the .hd name in the
+  game''s obb folder.'
 frame:
 - frame.unity_no_msaa
+- frame.unity_oculus_check
+adapter:
+  haptic_fix: 1
+  ovrp_begin_gate: 1
+  ovrp_hold_physics: 1
 pcvr_alternative: Sniper Elite VR (Steam PC VR). Winter Warrior (Quest) works on the Frame.
 verified:
-  date: '2026-09-28'
-  overport_cli: 1.2.3
-  overport_runtime: 3.4.3-23204ea
-  known_good_sha256: e80883eb6945e267a375edf0ffd789268686440819add9d4dee9fdbdf466cbe4
+  date: '2026-10-07'
+updated: '2026-10-07'
+min_app: 0.12.1

catalog/games/com.MightyCoconut.WalkaboutMiniGolf.yaml

@@ -0,0 +1,24 @@
+package: com.MightyCoconut.WalkaboutMiniGolf
+title: Walkabout Mini Golf
+status: works
+tested_version: '6.7'
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.oculusos
+device:
+- device.text_input_window
+adapter:
+  controller_models: 1
+  haptic_fix: 1
+  scale: 1.5
+verified:
+  date: '2026-10-08'
+  known_good_sha256: cf3b5cbe131af8a2baaa3f5c665b1c7001c8b299473abfcf98d90e3c02b08a2f
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261007.6125817'
+  agent: 59
+  issue: 111
+source_hint: Walkabout Mini Golf

catalog/games/com.NewFolderGames.IAmCat.yaml

@@ -1,13 +1,14 @@
 package: com.NewFolderGames.IAmCat
 title: I Am Cat
-status: issues
-notes: The view vibrates slightly, even when holding still.
+status: works
+notes: Steady view with pose_consistency (the judder is gone).
 details: Unity 2022.3 with the Oculus XR Plugin falls back to GLES (Zink) on the Frame, where its single-pass
   (multiview) rendering drew the right eye wrong (GitHub issue 8); frame.unity_multipass renders each eye in its own
   pass (OculusSettings.GetStereoRenderingMode + its inlined read in OculusLoader.Initialize). Poses and frame times
   are consistent, but every frame reaches the runtime one display period late (two passes on Zink) and the game
-  clamps its physics step to 10 ms, so the view judders; scale 0.8 didn't change it. Possible next steps are fixing the
-  multiview path instead or the game's fixed timestep.
+  clamps its physics step to 10 ms. The judder came from the game locating its views about three times per frame and
+  getting slightly different poses each time; FrameBridge pose_consistency returns the same views for repeated
+  queries of one display time (proposed in GitHub issue 8). The grey right eye on the loading screen is still open.
 tested_version: 1.4.0.0
 engine: Unity
 xr: OpenXR
@@ -16,8 +17,11 @@ frame:
 - frame.unity_multipass
 device:
 - device.text_input_window
+adapter:
+  pose_consistency: 1
 verified:
-  date: '2026-10-03'
+  date: '2026-10-05'
   issue: 8
-updated: '2026-10-04'
+updated: '2026-10-05'
+min_app: 0.11.0
 source_hint: I Am Cat

catalog/games/com.PixelToys.BattleSisters.yaml

@@ -0,0 +1,29 @@
+package: com.PixelToys.BattleSisters
+title: BattleSisters
+status: works
+notes: Plays; controller buttons and vibration work, hands follow the controllers (pose_time_fix).
+details: Unity 2019.4 with Unity's built-in Oculus support. frame.unity_oculus_check starts VR (Meta's system-app
+  check), adds the frame wait its legacy loop never makes (without it the GPU hung, black screen) and lets Unity's
+  Oculus input accept Lepton's device model (it only reported controllers on a device named "Oculus ...", so buttons
+  were dead). haptic_fix stops the first controller vibration from freezing the Frame (OVRPort's loader read its
+  duration in nanoseconds as seconds and the game ran out of memory). With pose_time_fix the hands follow the controllers
+  - OVRPlugin asked for hand poses at Android's monotonic "now", which on SteamOS 0.4.5 is 2.56 s behind the runtime's
+  XrTime, so the hands lagged far behind.
+tested_version: 1.2.4
+engine: Unity
+xr: VrApi
+frame:
+- frame.unity_no_msaa
+- frame.unity_oculus_check
+- frame.unity_text_input
+- frame.unity_runtime_msaa_off
+- frame.unity_gl_shim
+adapter:
+  haptic_fix: 1
+  pose_time_fix: 1
+verified:
+  date: '2026-10-08'
+  issue: 48
+updated: '2026-10-08'
+min_app: 0.12.1
+source_hint: Battle Sister

catalog/games/com.StressLevelZero.BONELAB.yaml

@@ -1,15 +1,25 @@
 package: com.StressLevelZero.BONELAB
 title: BONELAB
-status: unsupported
-notes: Crashes while starting its graphics (Vulkan); no fix yet.
-details: SIGSEGV in vkCreateInstance, called from the game's own Vulkan hooks (libSLZQuestNative.so) into code that no
-  longer exists, right after OVRPlugin's pre-initialization creates and destroys an OpenXR instance. Keeping the
-  runtime (vrclient.so) and Steam's Fossilize layer loaded didn't help, so the stale pointer is to memory freed with
-  that first instance.
+status: works
+notes: Builds 1.2068 and 1.2974 play (owner's headset tests). One recipe serves both builds - 1.2068 needs frame.unity_user_presence (head tracking and controls); 1.2974 also needs
+  frame.slz_vulkan_hooks (72 fps after about 35 s of shader prewarming), which changes nothing on 1.2068.
+details: Both builds - the game runs (72 fps), but its player body stayed frozen - no head tracking, the controllers stuck to the
+  model, no buttons - although OpenXR input and OVRPlugin's poses were fine. A few seconds after start (when Unity
+  switches XR loaders) OVRPlugin reports the worn headset as not worn (ovrp_GetUserPresent2 -> 0), and BONELAB's
+  Marrow rig only follows the player while Unity's HMD device reports UserPresence (OpenControllerRig checks
+  XRHMD.IsUserPresent every frame). frame.unity_user_presence reports the headset as worn. Build 1.2974 only - it adds Stress
+  Level Zero's graphics plugin (libSLZQuestNative.so), which hooks Unity's Vulkan start-up (vkCreateInstance/
+  vkCreateDevice) and vkCreateSampler; on the Frame its vkCreateInstance wrapper calls an invalid pointer right after
+  OVRPlugin's pre-init instance is destroyed (a jump to 0, into an unloaded library, or a hang). frame.slz_vulkan_hooks
+  switches its two registrations off, so Unity starts Vulkan itself; the plugin's pipeline cache isn't used.
 tested_version: 1.2974.57485
 engine: Unity
 xr: OpenXR
+frame:
+- frame.unity_user_presence
+- frame.slz_vulkan_hooks
 verified:
-  date: '2026-10-04'
-updated: '2026-10-04'
+  date: '2026-10-08'
+updated: '2026-10-08'
 source_hint: BONELAB
+min_app: 0.12.1

catalog/games/com.ToastVR.Matilda.yaml

@@ -0,0 +1,22 @@
+package: com.ToastVR.Matilda
+title: Max Mustard
+status: works
+tested_version: 1.1.0
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-08'
+  known_good_sha256: 9a67459fa36c3b9ac0d035e6c43b1809b39772699333e8cfd7d2a4d7f17926a7
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261007.6125817'
+  agent: 59
+  issue: 110
+updated: '2026-10-09'
+source_hint: com.ToastVR.Matilda

catalog/games/com.ToastVR.RichiesPlankExperience.yaml

@@ -0,0 +1,22 @@
+package: com.ToastVR.RichiesPlankExperience
+title: Richie's Plank Experience
+status: works
+tested_version: 2.3.585
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.oculusos
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-07'
+  known_good_sha256: 7eb1366c2398e554624a5d66aefb0c731c64b1b6944bc1726d9187f123c37fb7
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20260922.6101926'
+  agent: 59
+  issue: 95
+source_hint: apks

catalog/games/com.VR_HOT.VR_HOT_Quest.yaml

@@ -0,0 +1,23 @@
+package: com.VR_HOT.VR_HOT_Quest
+title: VR HOT Quest
+status: works
+tested_version: 0.8.8.1
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.oculusos
+device:
+- device.text_input_window
+adapter:
+  controller_models: 1
+  haptic_fix: 1
+verified:
+  date: '2026-10-08'
+  known_good_sha256: c321606c536eba1673572a9f44fd9e20d2cb5bd9609d536189e6ad7057b9cd67
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20260922.6101926'
+  agent: 59
+  issue: 98
+source_hint: VR-HOT-Quest-0.8.8.1

catalog/games/com.YourCompany.SWP_VR.yaml

@@ -0,0 +1,25 @@
+package: com.YourCompany.SWP_VR
+title: Star Wars Pinball VR
+tested_version: '1.4'
+source_hint: Star Wars Pinball VR
+engine: Unreal
+xr: VrApi
+status: works
+notes: Plays (owner's headset test); one short audio hiccup seen.
+details: 'Unreal 4.25 (GLES) built against OVRPlugin 1.44. Four Frame problems in a row: Zink crashed on Unreal''s
+  multisampled render-to-texture (fault addr 0x10000 on the RHIThread): frame.unreal_gl_shim, which keeps Unreal''s
+  multiview and draws those passes single-sampled; OVRPort''s OVRPlugin lacks ovrp_GetPTWNear, so Unreal''s Oculus
+  module never started VR (then a null pointer in GetMultiViewSceneColor): frame.unreal_ovrp_entrypoints; the engine''s
+  OpenSSL assembly has unpaired return-address checks the Frame''s CPU enforces (SIGILL on the HttpManager thread):
+  frame.pac_hints. Needs its OBB (main.10765).'
+frame:
+- frame.unreal_gl_shim
+- frame.unreal_ovrp_entrypoints
+- frame.pac_hints
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-08'
+  issue: 83
+updated: '2026-10-08'
+min_app: 0.12.1

catalog/games/com.beatgames.beatsaber.lj369vr.yaml

@@ -0,0 +1,21 @@
+package: com.beatgames.beatsaber.lj369vr
+title: Beat Saber
+status: works
+tested_version: 1.40.8_7379
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.unity_runtime_msaa_off
+- frame.unity_gl_shim
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 6366a5411328b21de9e2da034af78290882b3c27b7a8f0c61688196e91320055
+  app: 0.11.0
+  overport_cli: 1.2.5
+  frame_build: '20261005.6135832'
+  agent: 56
+  issue: 68
+source_hint: Beat Saber

catalog/games/com.camouflaj.manta.yaml

@@ -1,16 +1,21 @@
 package: com.camouflaj.manta
 title: 'Batman: Arkham Shadow'
-tested_version: 1.4.1-350961
-source_hint: 'Batman- Arkham Shadow'
-engine: Unity
-xr: OpenXR
 status: works
 notes: Large data set (~27 GiB) incl. all language packs.
-details: Uses Meta XR Audio (Wwise), handled by patch_meta_xr_audio. Includes all language packs (~28 GB).
+details: 'Uses Meta XR Audio (Wwise), handled by patch_meta_xr_audio. Includes all language packs (~28 GB). sync_guard
+  (to test, GitHub #102) - a reporter''s game quit to Steam''s waiting screen after the Frame runtime crashed in
+  xrSyncActions (CVRInputLatest::UpdateActionState), the input race Myst had.'
+tested_version: 1.4.1-350961
+engine: Unity
+xr: OpenXR
 overport_extra:
 - patch_disable_space_warp
+adapter:
+  sync_guard: 1
 verified:
   date: '2026-09-28'
   overport_cli: 1.2.3
   overport_runtime: 3.4.3-23204ea
   known_good_sha256: 796d1cab08f614d72c50d9702974c719c0908f5de91183cfe02d1fd5eb09551a
+updated: '2026-10-09'
+source_hint: Batman- Arkham Shadow

catalog/games/com.camouflaj.salmon.yaml

@@ -0,0 +1,17 @@
+package: com.camouflaj.salmon
+title: Marvel's Iron Man VR
+status: works
+tested_version: 0.1.0-250068
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-05'
+  known_good_sha256: 41e0ab90f622afd50accb0b6e2553520d30a6cc82e5ab4cbb2341b48f7316a71
+  app: 0.9.1
+  overport_cli: 1.2.5
+  issue: 47
+source_hint: Marvel's Iron Man VR

catalog/games/com.characterBank.ruinsmagus.yaml

@@ -0,0 +1,21 @@
+package: com.characterBank.ruinsmagus
+title: RUINSMAGUS
+status: works
+tested_version: 1.2.3
+engine: Unity
+xr: VrApi
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-07'
+  known_good_sha256: 230e5625fbdfebb47c4d96aeb87f45270e4e6c79a33c08315c90626ab7465fe5
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 89
+source_hint: RUINSMAGUS

catalog/games/com.cloudheadgames.pistolwhip.yaml

@@ -0,0 +1,22 @@
+package: com.cloudheadgames.pistolwhip
+title: Pistol Whip
+status: works
+notes: 120 HZ
+tested_version: 1.6.0.2
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-08'
+  known_good_sha256: ebd97af54c59d59d473c98492c1bb26ce6059b7e59f27a08acfc5ada23d0b774
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 100
+source_hint: Pistol Whip

catalog/games/com.coatsink.alone.yaml

@@ -0,0 +1,25 @@
+package: com.coatsink.alone
+title: Jurassic World Aftermath Collection
+status: works
+notes: Plays (owner's headset test, 2026-10-06).
+tested_version: v3.16
+engine: Unity
+xr: VrApi
+frame:
+- frame.unity_no_msaa
+- frame.unity_oculus_check
+- frame.unity_text_input
+- frame.unity_runtime_msaa_off
+- frame.unity_gl_shim
+- frame.vrapi_stub
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 0566b39d96258fa15eb1b03f27a7ad4219eb5442b0355cd803ed1cf13313f1b3
+  app: 0.12.0
+updated: '2026-10-06'
+min_app: 0.12.0
+source_hint: Jurassic World Aftermath Collection

catalog/games/com.crowscrowscrows.AccountingPlus.yaml

@@ -1,17 +1,18 @@
 package: com.crowscrowscrows.AccountingPlus
 title: Accounting+
-status: issues
-notes: Starts in VR, but doesn't get past its "press any button" screen.
+status: works
+notes: Plays normally, including the "press any button" screen after choosing to sit or stand.
 details: Unity 2017.4 built-in Oculus support. frame.unity_oculus_check gets VR started (Meta's system-app check and
-  the frame wait its legacy loop never makes, libfp_ovrp.so), ~72 fps. Controller input reaches the game's OVRInput
-  cleanly (both Touch controllers connected, individual button bits, input focus 1 while focused) but the screen
-  doesn't continue; Cpp2IL can't read this Unity version to see what it waits for.
+  the frame wait its legacy loop never makes, libfp_ovrp.so), ~72 fps. The motion warning after the stance selection
+  waits for a mouse click (Input.GetMouseButtonDown), which a Quest delivers for the controller press and Lepton never
+  does; the same library now counts a newly pressed trigger or A/B/X/Y as that click.
 tested_version: 1.24.35
 engine: Unity
 xr: VrApi
 frame:
 - frame.unity_oculus_check
 verified:
-  date: '2026-10-04'
-updated: '2026-10-04'
+  date: '2026-10-06'
+updated: '2026-10-06'
+min_app: 0.11.0
 source_hint: Accounting+

catalog/games/com.curif.AgeOfJoy.yaml

@@ -0,0 +1,22 @@
+package: com.curif.AgeOfJoy
+title: AgeOfJoy
+status: works
+tested_version: '1.0'
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.oculusos
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-08'
+  known_good_sha256: 9780e71e417b86290147c67c83755305801d8957909734c717a519034edefdf9
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 103
+source_hint: AgeOfJoy 05 rc30

catalog/games/com.drbeef.doom3quest.yaml

@@ -0,0 +1,14 @@
+package: com.drbeef.doom3quest
+title: Doom3Quest
+status: issues
+notes: PDA shows black screen.
+tested_version: 1.4.8
+engine: Other
+xr: OpenXR
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 3c733f5cd08b6fa5d9e2775b1c1aee36b5943518b5d8451ba87e3c59a702afdf
+  app: 0.12.0
+  overport_cli: 1.2.3
+  issue: 77
+source_hint: doom3quest148

catalog/games/com.drbeef.lambda1vr.yaml

@@ -0,0 +1,17 @@
+package: com.drbeef.lambda1vr
+title: Lambda1VR
+status: works
+notes: 'Needs the game data: upload the release''s xash folder to the game''s storage (Files tab) and set --msaa
+  1 in xash/commandline.txt. Owner''s headset test, 2026-10-06.'
+tested_version: 1.7.3
+engine: Other
+xr: OpenXR
+frame:
+- frame.tbxr_vendor
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 10bbccceb8d9a84ff3bcc9a21fd59db52784ff7742998bbe5b30d938dd7b97d2
+  app: 0.12.0
+updated: '2026-10-06'
+min_app: 0.12.0
+source_hint: Lambda1VR

catalog/games/com.enhanceexperience.tetriseffect.yaml

@@ -0,0 +1,18 @@
+package: com.enhanceexperience.tetriseffect
+title: TetrisEffect
+status: works
+notes: Opened the game, messed around with the menu, and played the first level. Works great.
+tested_version: 2.0.2
+engine: Unreal
+xr: VrApi
+alt_overport:
+- patch_remove_unreal_force_quit
+verified:
+  date: '2026-10-05'
+  known_good_sha256: 9ea10027ad8b7aefba8c14f23575c9cbbcaf3b38d12b971ea9c06635721b23c1
+  app: 0.9.1
+  overport_cli: 1.2.5
+  frame_build: '20260922.6101926'
+  agent: 48
+  issue: 45
+source_hint: tetriseffect

catalog/games/com.ilmxlab.tales.yaml

@@ -0,0 +1,27 @@
+package: com.ilmxlab.tales
+title: 'Star Wars: Tales from the Galaxy''s Edge'
+status: unknown
+notes: Not working yet - after the intro logos and a loading animation the picture goes black (GitHub issue 61). Gets
+  the controller fixes found for Vader Immortal (same studio) to test.
+details: Unreal Engine 4 (GLES) by ILMxLAB, like Vader Immortal, but a different engine build - it has none of Vader's
+  Quest-only branches (no GetQuestShaderPrecompilePercent or RPOC key map; it precompiles shaders through Unreal's own
+  pipeline cache), so frame.unreal_quest_precompile/_keymap don't apply. Its seasons and Wwise banks are Meta platform
+  asset files (frame.asset_files). Vader's OVRPlugin findings apply to it as well - poses asked for at OVRPlugin's own
+  clock (pose_time_fix) and thumb proximity from an extension the Frame lacks (proximity_emul). Ruled out for the black
+  picture so far (see the diagnostics in issue 61) - asset-file paks, Valve's foveation, GL errors; the game's own eye
+  image reads back black.
+tested_version: 1.1.9+734762.cl.439699
+engine: Unreal
+xr: VrApi
+alt_overport:
+- patch_remove_unreal_force_quit
+frame:
+- frame.asset_files
+adapter:
+  pose_time_fix: 1
+  proximity_emul: 1
+verified:
+  issue: 61
+updated: '2026-10-09'
+min_app: 0.12.1
+source_hint: Star Wars- Tales from the Galaxys Edge

catalog/games/com.markschramm.gravitylab.yaml

@@ -0,0 +1,24 @@
+package: com.markschramm.gravitylab
+title: Gravity Lab
+status: works
+notes: Works great, along with passthrough mode
+tested_version: '1.221'
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+- frame.unity_runtime_msaa_off
+- frame.unity_gl_shim
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-09'
+  known_good_sha256: 82c95ee7487a130b6e37b967dd97c8362bf4d7e873fcff823f2c7877a62ff99f
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261007.6125817'
+  agent: 59
+  issue: 113
+source_hint: Gravity Lab

catalog/games/com.odders.shapeit.yaml

@@ -0,0 +1,19 @@
+package: com.odders.shapeit
+title: BodyCombat
+status: works
+tested_version: 3.0.0
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-05'
+  known_good_sha256: 1aa5b2a46b25c86db65e3355a575af14b5d4d89b967c812274f181aab2e62b33
+  app: 0.9.1
+  overport_cli: 1.2.5
+  frame_build: '20260930.6234839'
+  agent: 48
+  issue: 56
+source_hint: LES MILLS BODYCOMBAT

catalog/games/com.playful.LuckysTale.yaml

@@ -1,11 +1,12 @@
 package: com.playful.LuckysTale
 title: Lucky's Tale
-status: issues
-notes: Runs out of memory within a few minutes and freezes the Frame until the game is killed.
-details: Unity's asset loading thread (Loading.PreloadManager) grows the game's native heap by about 1 GB/s
-  shortly after start (10+ GB plus all swap, then the kernel kills it; perf page-fault profile, 2026-10-04). The text
-  window and the MSAA patch aren't the cause (same with the window off); the OBB is byte-identical to the original.
-  The earlier "headset restarted in a menu" reports (GitHub issue 9) were most likely this. No fix yet.
+status: works
+notes: Plays normally; touching a save slot no longer freezes the Frame (haptic_fix).
+details: Touching a save slot vibrates the controller through XR_FB_haptic_amplitude_envelope; OVRPort's OpenXR
+  loader converts that envelope with the duration in nanoseconds read as seconds and allocates an enormous buffer, so
+  the Frame ran out of memory and froze (found by the GitHub issue 9 reporter). FrameBridge's extension shim turns the
+  envelope into a plain vibration before OVRPort's loader sees it (haptic_fix). Brief pauses came from the headset's
+  wear sensor flickering, now hidden by focus_hold (on by default).
 tested_version: 1.0.55
 engine: Unity
 xr: VrApi
@@ -14,8 +15,11 @@ frame:
 - frame.unity_runtime_msaa_off
 device:
 - device.text_input_window
+adapter:
+  haptic_fix: 1
 verified:
-  date: '2026-10-03'
+  date: '2026-10-05'
   issue: 9
-updated: '2026-10-04'
+updated: '2026-10-05'
+min_app: 0.11.0
 source_hint: Luckys Tale

catalog/games/com.qcxr.qcxr.yaml

@@ -1,13 +1,18 @@
 package: com.qcxr.qcxr
 title: QuestCraft
-status: issues
-notes: The launcher runs, but Minecraft crashes while starting its graphics (OpenGL error 1282).
+status: works
+notes: Minecraft runs in VR (Vivecraft, about 72 fps; drops while worlds load). Needs FramePort 0.10.0 or newer for
+  the picture (older versions show black). On first start QuestCraft downloads its Java runtime, which didn't unpack on
+  the Frame once (see details).
 details: QuestCraft downloads its Java runtime (JRE.zip from QuestCraft's GitHub releases) into files/runtimes/JRE
-  on first start; on the Frame that step left nothing behind ("libjvm.so not found"). With the runtime unpacked there
-  by hand, Java, Fabric and the mods load and Minecraft 1.21.5 starts initializing, then its first texture fails with
-  OpenGL error 1282 in QuestCraft's GL-to-GLES layer on Zink. Leads (2026-10-04) - Android's libEGL ran out of
-  eglGetProcAddress slots for desktop GL functions; LWJGL and JNA natives in the APK don't match the newer files
-  QuestCraft downloads.
+  on first start; on the Frame that step once left nothing behind ("libjvm.so not found"; unpacked by hand). Two
+  Frame fixes, both owner-verified 2026-10-05. (1) Minecraft 1.21.5 checks GL errors strictly and aborted with
+  "OpenGL error 1282", an error the Frame's Mesa (Zink) reports where Quest's driver doesn't; QuestCraft's GL-to-GLES
+  layer (LTW) ignores GL errors when LIBGL_NOERROR is set, which Lepton passes from LEPTON_ENV_LIBGL_NOERROR. (2) LTW
+  passes desktop GL_DEPTH_COMPONENT32 through, which Mesa rejects, so every framebuffer was incomplete and the picture
+  black; frame.ltw_depth (automatic for APKs with libltw.so) loads GLES through a shim that asks for
+  GL_DEPTH_COMPONENT32F. Left over, harmless so far - Mesa still reports about 4 GL_INVALID_OPERATION per frame
+  ("in glthread", so the call is unknown; mesa_glthread=false would name it).
 tested_version: 6.0.0-RC4
 engine: Unity
 xr: OpenXR
@@ -15,7 +20,9 @@ frame:
 - frame.unity_text_input
 device:
 - device.text_input_window
+lepton_env:
+  LEPTON_ENV_LIBGL_NOERROR: '1'
 verified:
-  date: '2026-10-04'
-updated: '2026-10-04'
+  date: '2026-10-05'
+updated: '2026-10-05'
 source_hint: QuestCraft

catalog/games/com.resolutiongames.abvriop.santacruz.yaml

@@ -0,0 +1,20 @@
+package: com.resolutiongames.abvriop.santacruz
+title: palazzo_santacruz
+status: works
+notes: Played a few levels. Passthrough also works.
+tested_version: 3.7.6.10866-release
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+verified:
+  date: '2026-10-05'
+  known_good_sha256: 394214a68297c1e5b019dc4f65b145e7bd0e98604205616364e0c151c1afd894
+  app: 0.9.1
+  overport_cli: 1.2.5
+  frame_build: '20260922.6101926'
+  agent: 48
+  issue: 46
+source_hint: abvriop

catalog/games/com.survios.Creed.yaml

@@ -0,0 +1,17 @@
+package: com.survios.Creed
+title: Creed
+status: works
+tested_version: CRU-386950
+engine: Unreal
+xr: OpenXR
+alt_overport:
+- patch_remove_unreal_force_quit
+verified:
+  date: '2026-10-05'
+  known_good_sha256: c319dd95198a0a96a883aa70f6be9c843da0a265967fa4a7343ce7e6f4bfdc87
+  app: 0.10.0
+  overport_cli: 1.2.5
+  frame_build: '20260930.6234839'
+  agent: 54
+  issue: 60
+source_hint: Creed Rise to Glory

catalog/games/com.vertigogames.ImpactDevelopment.yaml

@@ -0,0 +1,26 @@
+package: com.vertigogames.ImpactDevelopment
+title: Metro Awakening
+status: works
+notes: Plays (owner's headset test) with the Vulkan shim's fixes, fragment density maps hidden, space warp off and without
+  Valve's VALVE_rpo layer (random jumping polygons in 3D without the last two, as in Into The Radius 2).
+details: Unreal 5.2 (Vulkan) quit itself (ForceQuit, use_alt), then crashed three times in the Frame's Vulkan driver
+  (Turnip) on things Quest's driver ignores - a depth resolve in a subpass without a depth attachment, image barriers
+  and image views for a missing image. Unreal turns on fragment-density-map foveation because the driver offers the
+  extension and then expects the density map from the headset, which the Frame never provides; vk_hide_fdm hides the
+  extension from the game (Valve's own foveation layer is unaffected).
+tested_version: 1.0-916944
+engine: Unreal
+xr: OpenXR
+alt_overport:
+- patch_remove_unreal_force_quit
+use_alt: true
+adapter:
+  vk_spec_fixes: 1
+  vk_hide_fdm: 1
+  hide_space_warp: 1
+lepton_env:
+  VK_INSTANCE_LAYERS: VK_LAYER_VALVE_fdm_injection
+verified:
+  date: '2026-10-06'
+updated: '2026-10-06'
+source_hint: Metro Awakening

catalog/games/com.zenstudios.PFXVRQuest.yaml

@@ -0,0 +1,22 @@
+package: com.zenstudios.PFXVRQuest
+title: Pinball FX VR
+status: issues
+notes: Plays; mixed reality mode not working yet. Space warp off (fewer stutters).
+tested_version: '1.9'
+engine: Unreal
+xr: OpenXR
+alt_overport:
+- patch_remove_unreal_force_quit
+adapter:
+  equirect_emul: 1
+  hide_space_warp: 1
+verified:
+  date: '2026-10-05'
+  known_good_sha256: ec5491f6a809c0ee9624e4a43aa0f2c307eb048763492d32a00ff4e0511efe54
+  app: 0.9.1
+  overport_cli: 1.2.5
+  frame_build: '20260930.6234839'
+  agent: 48
+  issue: 50
+updated: '2026-10-06'
+source_hint: Pinball FX VR

catalog/games/io.ARVORE.TheBoysVR.yaml

@@ -0,0 +1,21 @@
+package: io.ARVORE.TheBoysVR
+title: The Boys VR
+status: works
+notes: Plays with space warp off (owner's headset test, 2026-10-06; black screen reported before).
+tested_version: 1.1.0.345
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+  hide_space_warp: 1
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 5df46b1771611c607229ee59298d983a4d78a57591d4864a02da2df5d2b6f97b
+  app: 0.12.0
+updated: '2026-10-06'
+min_app: 0.12.0
+source_hint: The Boys

catalog/games/jp.co.amata.nvr.yaml

@@ -0,0 +1,21 @@
+package: jp.co.amata.nvr
+title: The Tale of Onogoro
+status: works
+tested_version: 1.1.0248
+engine: Unity
+xr: OpenXR
+frame:
+- frame.unity_text_input
+device:
+- device.text_input_window
+adapter:
+  haptic_fix: 1
+verified:
+  date: '2026-10-08'
+  known_good_sha256: d6258a22a0a6e4588bbec36170f126bffc44ed64784f99e37cf4b03ad212fb79
+  app: 0.12.0
+  overport_cli: 1.2.5
+  frame_build: '20261006.6173745'
+  agent: 59
+  issue: 108
+source_hint: The Tale of Onogoro

catalog/games/org.timecrisis.quest.yaml

@@ -0,0 +1,18 @@
+package: org.timecrisis.quest
+title: Time Crisis VR (Experimental)
+status: works
+notes: Fully playable at 120hz
+tested_version: 0.8.3
+engine: Other
+xr: OpenXR
+frame:
+- frame.sdl_clipboard
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 4e67411a8e9c0b5fbb19ca7908c4222aa5ad1b2d47a8f4b5018b4fe9c2f5324e
+  app: 0.12.0
+  overport_cli: 1.2.3
+  frame_build: '20261005.6135832'
+  agent: 59
+  issue: 80
+source_hint: TimeCrisisVR-v0.8.3-quest

catalog/games/org.wiicompiled.quest.yaml

@@ -3,13 +3,18 @@ title: WiiCompiled VR
 status: issues
 notes: 'To add a game: in FramePort''s Files tab, upload your .wcgame file to this game''s storage, folder
   Android/data/org.wiicompiled.quest/files/WiiCompiledOpenXRVR/Import, then open WiiCompiled (it imports the newest
-  file there; one at a time). The right eye jitters during races.'
+  file there; one at a time). Once your game is imported, turn on "Start straight in VR" (and off "Show the app''s
+  Android window") and update it on the Frame: it then opens in VR without the flat launcher window, which otherwise
+  stays in view (turn it off again to import another game). The right eye jitters during races.'
 details: A native Mario Kart Wii recompilation (needs your own disc as .wcgame files built by the WiiCompiled
   launcher on a computer). Lepton's Android has no document picker, so the launcher's "Import from computer" and
   "select disc image" buttons fail (ActivityNotFoundException for OPEN_DOCUMENT); its Import folder is read when the
   launcher opens instead. The game's libmain.so has its own OpenXR loader and talks to the Frame's runtime directly
   (FrameBridge isn't in its path); the right-eye jitter in races comes from its stereo replay of the race view, so it
-  needs a fix in WiiCompiled itself. The launcher is a flat Android window (shown with lepton-show-flatscreen).
+  needs a fix in WiiCompiled itself. The launcher is a flat Android window (shown with lepton-show-flatscreen) that
+  stays in view after it starts the VR part (QuestActivity, process :game); frame.start_activity makes QuestActivity
+  the start activity (owner-verified 2026-10-05, opens straight in VR), but it skips the launcher's import step, so it
+  stays off by default.
 tested_version: 0.4.0-quest
 engine: Other
 xr: OpenXR
@@ -20,5 +25,5 @@ device:
 - device.text_input_window
 verified:
   date: '2026-10-04'
-updated: '2026-10-04'
+updated: '2026-10-05'
 source_hint: WiiCompiled

catalog/games/rift.superhot_vr.yaml

@@ -1,11 +1,13 @@
 package: rift.superhot_vr
 title: SUPERHOT VR
 status: works
-notes: 'Supports SteamVR/OpenXR itself: runs directly, without Revive.'
+notes: 'Supports SteamVR/OpenXR itself: runs directly, without Revive. Older builds with both Oculus and SteamVR support
+  (SUPERHOTVR.exe) start with -vrmode OpenVR.'
 engine: Unity
 xr: OpenXR
 kind: rift
 pcvr:
+- pcvr.launch_args
 - pcvr.xr_timefix
 - pcvr.steamvr_tuning
 pcvr_remove:
@@ -17,4 +19,5 @@ verified:
   app: 0.6.3
   overport_cli: 1.2.5
   issue: 28
+updated: '2026-10-09'
 source_hint: SUPERHOT VR

catalog/games/ru.targem.blazerush.yaml

@@ -0,0 +1,18 @@
+package: ru.targem.blazerush
+title: BlazeRush
+status: unsupported
+notes: Starts and reaches the menu room, but the room shows no controllers and ignores all input (it all reaches
+  the game); no fix yet.
+tested_version: 1.0.349
+engine: Other
+xr: VrApi
+frame:
+- frame.vrapi_bridge
+- frame.avatar_stub
+verified:
+  date: '2026-10-06'
+  known_good_sha256: 7cbd5d4252788ccd3c95b5c1841dcc798ea029d687938c024e33bd698ba17671
+  app: 0.12.0
+updated: '2026-10-06'
+min_app: 0.12.0
+source_hint: BlazeRush

catalog/triage.yaml

@@ -8,13 +8,55 @@ signatures:
     severity: fatal
     diagnosis: Lepton found no activity with category LAUNCHER.
     suggest: [frame.launcher]
+  - id: linux-x86-no-fex
+    pattern: '(cannot execute binary file: Exec format error|exec format error)'
+    severity: fatal
+    diagnosis: An x86_64 Linux program was started directly; the Frame's arm64 CPU needs FEX (x86 translation) for it. Reinstall the app with FramePort 0.12 or newer, which installs FEX and starts the program through it.
+    suggest: []
   - id: no-arm64
     pattern: 'INSTALL_FAILED_NO_MATCHING_ABIS'
     severity: fatal
     diagnosis: 32-bit-only APK. The Steam Frame has no AArch32; this cannot run. Use the PC (Rift) version via Revive.
     suggest: []
+  - id: android-too-new
+    pattern: '(NoClassDefFoundError|ClassNotFoundException|NoSuchMethodError)\b.*(Landroid/window/|android\.window\.|(storeStoreFence|loadLoadFence)\(\)V in class Ljava/lang/invoke/VarHandle)'
+    severity: fatal
+    diagnosis: The app calls Android 12/13+ classes (android.window.*, VarHandle fences) that the Frame's Android 11 (API 30) container doesn't have; it needs a newer Android (e.g. minSdk 34 apps). Nothing to patch - it can't run until Valve updates the Frame's Android.
+    suggest: []
+  - id: web-wrapper
+    pattern: '(Creating TwaLauncher for com\.oculus\.browser|NameNotFoundException:? com\.oculus\.browser)'
+    severity: fatal
+    diagnosis: The app is a website in an Android wrapper (Trusted Web Activity) that opens Meta's browser (com.oculus.browser), which the Frame doesn't have, so nothing opens. There's no game to port - open the website (TWALauncherActivity's "Using URL" line) in a browser instead.
+    suggest: []
+  - id: unity-render-crash
+    pattern: 'CRASH\s*:.*#\d+\s+pc [0-9a-f]+\s+\S*libgallium_dri\.so'
+    severity: fatal
+    diagnosis: Unity's render thread crashed inside the Frame's GL driver (Mesa/Zink); the picture freezes or stays grey. Known triggers - an OVROverlay copy (try "Unity - skip OVROverlay layers", e.g. The Room VR), MSAA switched on at runtime, a GPU hang (zink DEVICE LOST).
+    suggest: [frame.unity_no_overlay_copy, frame.unity_runtime_msaa_off]
+  - id: unreal-msrtt-crash
+    pattern: 'fault addr 0x10000 in tid \d+ \((RHIThread|RenderThread)'
+    severity: fatal
+    diagnosis: The game's render thread jumped to address 0x10000 inside the Frame's GL driver (Mesa/Zink) a few seconds after start. Zink looks up a render-pass cache slot past its end when a game renders through multisampled render-to-texture (Unreal's mobile MSAA, e.g. Star Wars Pinball VR). Load the GL shim, which hides that extension.
+    suggest: [frame.unreal_gl_shim, frame.unity_gl_shim]
+  - id: pac-unpaired
+    pattern: 'ILL_ILLOPN\), fault addr 0x[0-9a-f]+ \(\*pc=0xd50323bf\)'
+    severity: fatal
+    diagnosis: The game crashed on a return-address check (autiasp) its code never signed. The Quest's CPU ignores these checks, the Steam Frame's enforces them; some OpenSSL assembly in game engines has such unpaired checks (e.g. Star Wars Pinball VR on its first network connection, thread HttpManager).
+    suggest: [frame.pac_hints]
+  - id: cube-swapchain-refused
+    pattern: 'xrCreateSwapchain \d+x\d+ .*faces=6 .*result=-\d+'
+    unless: 'cube_standin: runtime refused'
+    severity: fatal
+    diagnosis: The game asked for a cube-map swapchain (e.g. an OVROverlay skybox or loading cube), which the Frame's runtime doesn't have. OVRPlugin goes on without images and crashes in ovrp_EndFrame4 (Unity's render thread SIGSEGV in memset, e.g. Budget Cuts Ultimate). FrameBridge from FramePort 0.12 serves such swapchains itself and drops their cube layers (cube_standin, GLES games) - rebuild and reinstall the game.
+    suggest: [frame.adapter]
+    supersedes: [unity-render-crash, native-crash]
+  - id: swapchain-rect-invalid
+    pattern: 'xrEndFrame failed -25\b'
+    severity: fatal
+    diagnosis: The runtime rejects the game's frames because an image rect reaches past its swapchain (by a few pixels on some Frames); the game stops drawing (e.g. stuck at a "Waiting" box). FrameBridge from FramePort 0.11.0 clamps the rects - rebuild and reinstall the game.
+    suggest: [frame.adapter]
   - id: missing-ovr-symbol
-    pattern: '(UnsatisfiedLinkError|cannot locate symbol) .*"?(ovr_[A-Za-z0-9_]+|ovrMessageType_ToString)'
+    pattern: '(UnsatisfiedLinkError|cannot locate symbol) .*"?(ovr_[A-Za-z0-9_]+|ovr[A-Z][A-Za-z0-9]*_ToString)'
     severity: fatal
     diagnosis: The game imports Meta platform functions overport's loader lacks.
     suggest: [frame.ovrstubs, frame.ovrplatformcompat]
@@ -40,10 +82,26 @@ signatures:
     severity: error
     diagnosis: The Frame rejected the swapchain format (GLES games must use sRGB formats, no MSAA).
     suggest: [adapter.swapchain_fix]
+  - id: zink-shader-fix-mismatch
+    pattern: 'shader fix layer: a \d+-byte module differs from fix'
+    severity: warning
+    diagnosis: The game's OpenGL ES shader fix (zink_shader_fix) no longer matches the shader the Frame's GL driver (Zink)
+      builds - a Frame or Lepton update changed the driver's output - so the shader it fixes (e.g. Vader Immortal's
+      lightspeed jump) may hang the GPU again. Capture the new modules with zink_shader_dump=1 (files/fp_spirv/ in the
+      game's storage) and update the fix.
+    suggest: [adapter.zink_shader_dump]
+  - id: zink-shader-layer-inactive
+    pattern: 'shader fix layer: NOT active'
+    severity: warning
+    diagnosis: FramePort's shader-fix Vulkan layer couldn't add itself to the game's Vulkan layers (Android's
+      GraphicsEnv functions it uses were not found or behaved differently, e.g. after a Lepton update), so the game's
+      OpenGL ES shader fixes (zink_shader_fix) don't apply.
+    suggest: []
   - id: zink-device-lost
     pattern: 'zink.*DEVICE[_ ]LOST|VK_ERROR_DEVICE_LOST'
     severity: fatal
-    diagnosis: The GPU hung (Zink/Mesa). For GLES Unity games MSAA render-to-texture is the usual cause.
+    diagnosis: The GPU hung (Zink/Mesa). For GLES Unity games MSAA render-to-texture is the usual cause; at one effect
+      only, a shader reading undefined loop counters (e.g. Vader Immortal's lightspeed jump - frame.zink_shader_fix).
     suggest: [frame.unity_no_msaa, frame.unity_runtime_msaa_off]
   - id: unity-runtime-msaa
     pattern: 'recommended MSAA level is [248]\. Switching to the recommended level'
@@ -69,6 +127,12 @@ signatures:
     diagnosis: Unity didn't start its Oculus VR device (older Unity checks for Meta's system apps first), so the game
       runs as a hidden 2D app.
     suggest: [frame.unity_oculus_check]
+  - id: unity-frame-not-begun
+    pattern: 'frame loop shim: frame \d+: the last waited frame wasn.t begun'
+    severity: info
+    diagnosis: Unity skipped beginning a frame (typically while it activates a scene); FramePort's frame wait didn't
+      wait for that frame instead of blocking the game. A few at each scene load are normal.
+    suggest: []
   - id: sdl-no-clipboard
     pattern: 'ClipboardManager\.addPrimaryClipChangedListener|SDLClipboardHandler\.<init>'
     severity: fatal
@@ -81,18 +145,60 @@ signatures:
       harmless (Meta's OVRPlugin suggests plain Touch too); a game that suggests only these gets them again as Touch
       (profile_remap, on by default; log "controller profile ... -> oculus/touch_controller").
     suggest: []
+  - id: input-call-failed
+    pattern: 'input_diag: unsupported: (xrStringToPath|xrCreateAction|xrAttachSessionActionSets|xrSyncActions) ->'
+    severity: warning
+    diagnosis: The runtime refused one of the game's controller-input calls (logged by input_diag; the line names the
+      call, the result and the argument), so controls set up through it don't work.
+    suggest: []
   - id: gl-shader-failed
     pattern: 'GLShim\s*: SHADER COMPILE FAILED|#extension directive is not allowed in the middle|could not implicitly convert operands'
     severity: error
     diagnosis: Shaders written for Quest drivers fail on Mesa (GLSL strictness).
     suggest: [frame.gl_shim]
+  - id: gl-multiview-twin-failed
+    pattern: 'GLMV\s*: twin of program \d+(: stage| failed)'
+    severity: warning
+    diagnosis: The multiview interposer (frame.gl_multiview_fbo) couldn't build a single-view copy of one of the
+      game's shader programs (the line has the compiler's message); draws of that program into flat panels (HUD,
+      menus) still stay black. Please report it with the log; turning the patch off changes nothing else.
+    suggest: []
   - id: vrapi-unsupported-layer
     pattern: 'OVRPortVrApi.*Unsupported VrApi layer type (\d+)'
     severity: error
     diagnosis: The game submits a VrApi layer type the bridge can't show; whole frames are dropped (black screen).
     suggest: []
+  - id: graphics-requirements-missing
+    pattern: '(XR_ERROR_GRAPHICS_REQUIREMENTS_CALL_MISSING|Failed to create XR session: -50\b|xrCreateSession[^\n]*-50\b)'
+    severity: fatal
+    diagnosis: The game creates its OpenXR session without asking for the graphics requirements first; Meta's runtime
+      allows that, the Frame's doesn't (e.g. Lambda1VR). Current FrameBridge builds ask on the game's behalf and retry -
+      rebuild the game.
+    suggest: [frame.adapter]
+    supersedes: [native-crash]
+  - id: avatar-driver-missing
+    pattern: 'OVRAvatar-Loader: DisplayErrorAndExit'
+    severity: fatal
+    diagnosis: Meta's avatar library can't find its driver (it needs Meta's Horizon app) and stops the game (e.g.
+      BlazeRush). Replace it with a do-nothing library; the game runs without Meta avatars.
+    suggest: [frame.avatar_stub]
+    supersedes: [native-crash, java-crash]
+  - id: vrapi-symbol-missing
+    pattern: 'cannot locate symbol "vrapi_\w+"'
+    severity: fatal
+    diagnosis: The game needs a VrApi function its libvrapi.so doesn't have (e.g. BlazeRush before the bridge gained
+      vrapi_PollEvent). Rebuild with the current FramePort; if it persists, report the function name.
+    suggest: []
+    supersedes: [native-crash, java-crash, dlopen-failed]
+  - id: vrapi-before-init
+    pattern: 'VrApiLoader: vrapi_\w+ was called before vrapi_Initialize'
+    severity: fatal
+    diagnosis: Meta's VrApi loader stopped the game. Its OVRPlugin runs on OpenXR but still calls a VrApi function
+      without starting VrApi (e.g. Jurassic World Aftermath); the VrApi bridge can't stand in for this loader.
+    suggest: [frame.vrapi_stub]
+    supersedes: [direct-vrapi, native-crash]
   - id: direct-vrapi
-    pattern: 'vrapi_Initialize|VrApi.*not supported|libvrapi\.so.*(not found|failed)'
+    pattern: '(?<!called before )vrapi_Initialize|VrApi.*not supported|libvrapi\.so.*(not found|failed)'
     severity: warning
     diagnosis: The engine talks to VrApi directly; it needs the VrApi bridge.
     suggest: [frame.vrapi_bridge]
@@ -125,6 +231,18 @@ signatures:
     severity: warning
     diagnosis: Runtime lacks timespec time conversion (emulated by the current adapter build).
     suggest: [frame.adapter]
+  - id: unreal-vulkan-driver-crash
+    pattern: '#00 pc [^\n]*/vulkan\.freedreno\.so[\s\S]{0,3000}?lib(Unreal|UE4)\.so'
+    severity: fatal
+    diagnosis: The Frame's Vulkan driver crashed on a call from Unreal. Unreal 5 passes things Quest's driver ignores - a depth resolve in a subpass without a depth attachment (fixed by the Vulkan shim), image barriers and image views for a missing image when it expects fragment density maps (foveation) from the headset (e.g. Metro Awakening).
+    suggest: [frame.vk_sanitize, adapter.vk_spec_fixes, adapter.vk_hide_fdm]
+    supersedes: [native-crash]
+  - id: unreal-fdm-missing
+    pattern: 'vk shim: left out \d+ image barrier\(s\) without an image \(first: layout \d+ -> 1000218000'
+    unless: 'vk shim: fragment density map extensions hidden'
+    severity: warning
+    diagnosis: Unreal expects fragment density maps (foveation) from the headset, which the Frame doesn't provide; its image views for them crash the Frame's driver a few seconds later (e.g. Metro Awakening).
+    suggest: [adapter.vk_hide_fdm]
   - id: fossilize-renderpass
     pattern: '#0\d pc [^\n]*libVkLayer_fossilize\.so[\s\S]{0,4000}?FVulkanRenderPass::FVulkanRenderPass'
     severity: fatal
@@ -149,6 +267,26 @@ signatures:
     diagnosis: overport's OpenXR dispatcher aborted on a swapchain larger than 4096 px (video players, big textures).
     suggest: [frame.swapchain_limit]
     supersedes: [native-crash]
+  - id: ovr-microphone-crash
+    pattern: 'ovr_Microphone_GetOutputBufferMaxSize\+'
+    severity: fatal
+    diagnosis: The game asked OVRPort's Meta platform library for the microphone buffer size before starting the
+      microphone, and the library read the not-yet-opened audio stream (SIGSEGV in libaaudio.so, e.g. Unreal's Oculus
+      voice chat a few seconds after the logo).
+    suggest: [frame.ovr_microphone]
+    supersedes: [native-crash]
+  - id: slz-vulkan-hook-crash
+    pattern: 'SLZ Graphics plugin loading![\s\S]{0,20000}?E CRASH   : .*pc  0000000000000000'
+    severity: fatal
+    diagnosis: Stress Level Zero's graphics plugin (libSLZQuestNative.so) hooks Unity's Vulkan start-up and calls an invalid function there on the Frame (e.g. BONELAB 1.2974); the game crashes or hangs before its first frame.
+    suggest: [frame.slz_vulkan_hooks]
+    supersedes: [java-crash, native-crash]
+  - id: vivox-api31
+    pattern: 'NoSuchMethodError: No virtual method \w*CommunicationDevice\w*\(.*Landroid/media/AudioManager'
+    severity: fatal
+    diagnosis: The game's Vivox voice-chat SDK calls Android 12 audio-routing methods (AudioManager communication devices) without checking the Android version; Lepton runs Android 11, so the app crashes (e.g. Green Hell VR). The patch makes Vivox's audio-route check return early (voice chat keeps the default route).
+    suggest: [frame.vivox_audio_route]
+    supersedes: [java-crash]
   - id: native-crash
     pattern: 'Fatal signal (\d+) \(SIG[A-Z]+\)'
     severity: fatal
@@ -173,6 +311,7 @@ signatures:
     suggest: []
   - id: container-not-started
     pattern: "is not a running context|OCI runtime error"
+    unless: 'Boot complete!'  # Lepton 3.x prints the error while its container is still starting, then boots fine
     severity: fatal
     diagnosis: The Lepton container failed to start (see the error above it in launch.log).
     suggest: []
@@ -256,6 +395,19 @@ signatures:
     severity: fatal
     diagnosis: The game crashed (Unreal's crash reporter started). See the game log and crash summary in the log. Common causes are that no VR runtime reached the game (Revive off) or a GPU or driver problem under Proton.
     suggest: [pcvr.revive, pcvr.proton_log, pcvr.no_crash_reporter]
+  - id: unity-vr-init
+    kind: pcvr
+    pattern: '(?i)OpenVR failed initialization|VRInitError_(?!None\b)\w+|Initialization of device \w+ failed|Failed to (load|initialize|start) (VR|XR|OpenVR|Oculus)\b'
+    severity: error
+    diagnosis: The game's Unity log shows that a VR device failed to start. Unity games built for both the Oculus and the SteamVR (OpenVR) runtime choose one with an argument; without it they may try Oculus, which the Frame doesn't have, and run without VR or quit. Start the game with -vrmode OpenVR (Game arguments).
+    suggest: [pcvr.launch_args]
+  - id: unity-crash
+    kind: pcvr
+    pattern: 'Crash!!!|caused an Access Violation|caused an Unhandled Exception'
+    severity: fatal
+    diagnosis: The game crashed (Unity's crash handler wrote a report; the Unity log in the launch log shows the stack). Common causes are that no VR runtime reached the game or a GPU or driver problem under Proton.
+    suggest: [pcvr.proton_log]
+    supersedes: [wine-crash]
   - id: wine-crash
     kind: pcvr
     pattern: 'Unhandled exception: page fault|wine: Unhandled|Backtrace:'

docs/ARCHITECTURE.md

@@ -35,6 +35,11 @@
 ## Extending
 - **New fix**: `patches/frame/<name>.py` with a `Patch` subclass (`detect`, `apply`, optional `validate`), plus a
   signature in `catalog/triage.yaml` and a PLAYBOOK row. Stages: `overport` | `apk` | `install`.
+- **Upstream fixed a bug we work around**: register an `UpstreamFix` (`patches/upstream.py`) in the workaround's
+  module: a probe that finds the fix in OVRPort's output (True / False / None = can't tell). Each build runs the probes
+  on the converted APK and leaves out the workarounds whose fix is there (log "not needed: …", `build.superseded`,
+  left out of settings.conf at install; game page and `frameport show` say so). The recipe keeps asking for the fix,
+  so builds made with an older runtime keep the workaround. `FRAMEPORT_KEEP_WORKAROUNDS=1` turns it off.
 - **New heuristic**: put it in the patch's `detect()` (and `applies()` for visibility), with the evidence in the
   reason text; check `scripts/eval_heuristics.py` still reproduces the catalog and add a test in
   `tests/test_heuristics.py`.

docs/AUDIO_METADATA.md

@@ -0,0 +1,31 @@
+# Meta XR Audio metadata lifetime
+
+FrameBridge automatically handles metadata retirement in the verified AArch64
+Meta XR Audio Wwise build (`e1619e7fb839badf0ea5ecc22d9f028d0b17c34d`). It requires
+the build ID and exact function prologues; other builds and 32-bit adapters are
+left unchanged. No additional patch switch or recipe entry is required.
+
+The SDK queues terminated metadata for deletion, then drains those queues before
+reading the current `AkAudioObjects` snapshot. In Batman: Arkham Shadow, that
+snapshot can still reference queued metadata during smoke-bomb playback. The
+audio thread subsequently clears its dirty flags at offset 8 through the stale
+pointer. A hardware watch captured this store in
+`OculusEndpointSink::ConsumeObjectExperimentalMetadata`, at library offset
+`0x2ced90`. Reallocated input tree nodes occupy the same 48-byte size class;
+the stale store corrupts their right pointer and the game crashes later.
+
+`native/adapter/audio_metadata.h` wraps the audio consumption boundary to make
+the current snapshot available to metadata cleanup. `audio_metadata_queue.h`
+retains queued objects still referenced by that snapshot, then reclaims them
+normally when the references disappear. It preserves the SDK's queue mutex,
+virtual deleting destructor, audio parameters and processing. There is no timed
+quarantine, replacement allocator, audio suppression or diagnostic memory arena.
+
+Synthetic regression tests exercise mixed referenced and unreferenced queue
+entries, both metadata types, subsequent retirement, and cleanup without a live
+snapshot. On-headset smoke-bomb tests first showed the observed overwrite stopped,
+then passed with ordinary allocations and all memory diagnostics removed.
+
+The existing `frame.adapter` install step includes the repair in its packaged
+adapter and updates already wrapped APKs. Rebuild the adapters and checksums with
+`python native/build.py --only adapter`.

docs/DIAGNOSTICS.md

@@ -38,6 +38,8 @@ games/<pkg>/package/         stand-in for the game files (no content):
 games/<pkg>/target/          from the Frame (or the PC): launch.sh, settings.conf, deployment.json, launch.log,
                              launch-test.log (PC VR), lepton-steamlaunch-<appid>.log, logcat-{main,crash,system,...}.log,
                              ReviveInjector.txt / steam-<appid>.log / game-log-N.txt (PC VR), files.json (+ missing)
+                             (game-log-N.txt: Unreal Saved/Logs + crash summaries, Unity Player.log / Player-prev.log /
+                             output_log.txt + crash error.log from the Proton prefix, agent v67)
 ```
 Each log keeps at most its last 4 MB (2 MB per file from the Frame).
 

docs/FAQ.md

@@ -0,0 +1,31 @@
+# FAQ
+
+## How should I lay out a game that has OBB files (an APK plus a data folder)?
+
+Give every game its own folder, put the APK in it, and put the game's data next to the APK in a folder named
+after the game's **package name** (the name the `.obb` files contain, e.g. `com.Armature.VR4`):
+
+```
+Games/                                  ← scan this folder (Add games → Scan a folder)
+├── Resident Evil 4/                    ← one folder per game (any name)
+│   ├── VR4.apk                         ← the APK (any file name)
+│   └── com.Armature.VR4/               ← the data folder: exactly the package name
+│       ├── main.203.com.Armature.VR4.obb
+│       └── patch.203.com.Armature.VR4.obb
+└── Beat Saber/
+    └── com.beatgames.beatsaber.apk     ← games without OBBs: just the APK
+```
+
+- **Data folder name:** the package name (`com.Armature.VR4` above), or `obb`. FramePort uses the first of the two
+  that exists and isn't empty.
+- **Everything in that folder is copied** to the game's `Android/obb/<package>/` on the Frame, subfolders included.
+  So games that ship raw data files instead of `.obb` files work the same way.
+- **One game per folder.** Several APKs in one folder count as one game; FramePort uses the first and keeps the others
+  as alternates.
+- **Scanning:** pick the folder that contains the game folders (`Games/` above) to add them all, or one game's folder
+  to add just that game. FramePort looks up to 5 levels deep.
+- **A single game:** Add games → Add an APK file… works with a lone APK too. Its data is found when the data folder sits next
+  to the APK, named as above.
+
+Not sure of the package name? Look at the OBB file names: `main.<version>.<package name>.obb`. Or add the APK
+first: the game's page shows the package name under **Details**.

docs/FRAME_RUNTIME.md

@@ -28,6 +28,23 @@
   work on Android 11: `policy_control` is gone, `cmd statusbar send-disable-flag home recents` has no `back` and
   moves the back button onto the app's controls, the `sysui_nav_bar` layout and disabling SystemUI had no effect.
 
+## Where FramePort keeps games (internal storage, microSD)
+- Every game has an **anchor** on internal storage: `~/Applications/quest-frame/<pkg>/` with `launch.sh`,
+  `deployment.json`, `artwork/` and `plays.log`. Steam's shortcut points at the anchor's `launch.sh`, so it never
+  changes when the files move.
+- The game's files (`lepton-app/`, `lepton-data/` = saves, `lepton-shaders/`, `settings.conf`, `launch.log`; PC VR:
+  `game/`, `revive/`, `compatdata/` = Proton prefix; Linux: `app/`) live in `deployment.json["base"]`: the anchor
+  itself on internal storage, or `<mount>/FramePort/<pkg>` on another drive (GitHub #90, agent v63).
+- SteamOS mounts removable drives (microSD) under `/run/media/<user>/<label or uuid>`; the agent's `drives` reads
+  `/proc/mounts` (plus the drives of Steam library folders) and refuses vfat/exfat/ntfs (Lepton's data and Proton
+  prefixes need Unix owners, permissions and symlinks) and read-only mounts. A drive that isn't mounted is an error for
+  new installs (never a silent fallback to internal storage); `list_installed` marks games on it `drive_missing` and
+  their launchers stop with "storage not mounted?".
+- `move` copies with `cp -a` inside `podman unshare` (files Lepton's containers own belong to subordinate user ids),
+  compares file count + bytes, retargets absolute symlinks into the old folder (the LibOVRRT → Revive redirect), points
+  `launch.sh` at the new folder and only then deletes the old copy; on the same filesystem it renames instead.
+  Moving a game whose Lepton data holds absolute paths, or a PC VR prefix, is not yet verified on the device.
+
 ## OpenXR runtime (as seen by games through overport's loader)
 - Instance extensions present include KHR_android_create_instance (must be enabled; the adapter adds it),
   KHR_vulkan_enable(2), KHR_opengl_es_enable, KHR_composition_layer_depth, FB_display_refresh_rate, EXT_hand_tracking
@@ -55,6 +72,17 @@
 ## Graphics stack
 - Vulkan: freedreno (Mesa Turnip); Valve injects `VK_LAYER_VALVE_rpo` and `VALVE_fdm_injection` via
   VK_INSTANCE_LAYERS (set `VK_INSTANCE_LAYERS=""` through `device.lepton_env` to test without them).
+  The FDM layer follows each eye's gaze; one-eye jitter in some games (GitHub #69) is fixed per game with
+  `device.foveation`: `fixed` = `FDM_DEBUG=disable_offsets`, `off` = `VK_INSTANCE_LAYERS=""`. Lepton passes `FDM`,
+  `FDM_DEBUG`, `FOVE_LEVEL` and `FDM_SWAPCHAIN_SIZE` through to the container (liblepton/mounting.sh PASSTHROUGH_VARS);
+  the layers are chosen on the host, so setting them inside the game does nothing.
+- How Lepton loads them: `liblepton/vulkan_layers.sh` mounts the chosen layers (only those in the OS image's
+  `/usr/share/guestos/android/vendor/vulkan_layers`) into the app's lib dir and writes their names to Android's
+  `settings global gpu_debug_layers` for `gpu_debug_app` = the game; Android's loader reads that list from GraphicsEnv
+  at each vkCreateInstance and searches the app's lib dir (`/data/app/…/lib/arm64`). A layer bundled in the APK is
+  found there too; FramePort's shader-fix layer (`frame.zink_shader_fix`) adds its own name to GraphicsEnv's list from
+  inside the process (`android::GraphicsEnv::setDebugLayers`, exported by the guest's libgraphicsenv.so, Lepton 3.0.5).
+  That is the only way to reach the Vulkan side of OpenGL ES games (Zink creates the instance inside Mesa).
 - GL ES: Zink (Mesa GL on Vulkan). Strict GLSL (see PLAYBOOK) and occasional `DEVICE LOST` with MSAA render-to-texture.
 
 ## Proton / Windows games (surveyed 2026-09-29; running a Rift game under it not yet verified)
@@ -65,6 +93,17 @@
   SteamLinuxRuntime_4). None are installed by default.
 - `steam -ifrunning steam://install/<appid>` only opens a confirmation dialog in the headset. The agent's unattended
   mode writes an appmanifest stub (StateFlags 1026, installdir from appinfo) and restarts Steam, which then downloads it.
+- **x86_64 Linux apps (agent v61; verified on the device 2026-10-07: an x86_64 glibc test program installed + launch test RUNNING, "machine=x86_64 glibc=2.41"):**
+  FEX is Steam app 3127680 (`fex`, installs as `common/FEX-Emu`, ~6 MB, 21 s via the appmanifest-stub path:
+  `install_proton` / `proton_status` with `kind: linux_x86`). Its toolmanifest commandline is
+  `/fex-compat-tool %verb% --`, **no** require_tool_appid: it does not use the Steam Linux Runtime. fex-compat-tool
+  (Python) runs `<FEX-Emu>/usr/bin/FEX` with RootFS `/usr/share/guestos/fex-mesa` (part of the SteamOS image: an
+  x86 Arch-style root with glibc 2.41, Mesa, graphics_provider.json for x86_64 + i386), emulates x86_64 and i386
+  (emulator.json), honours `STEAM_FEX_TSOENABLED`, `STEAM_FEX_MULTIBLOCK`, `STEAM_COMPAT_FEX_CONFIG`, sets
+  `tu_override_uncached_as_cache_coherent=true` and logs to `/tmp/fex-compat-tool-<pid>.log`. It **exits 1 ("No compat
+  data path?") without `STEAM_COMPAT_DATA_PATH`** (keeps Config.json/AppConfig/Server/Telemetry in `<it>/fex-emu/`):
+  the Linux launcher exports `<base>/compatdata`. Version seen: FEX-2607-76-g37265b1. ldd can't read x86 programs,
+  so the missing-library check is skipped for them; an x86_64 AppImage is extracted through the same chain.
 - The command Steam runs is built from each tool's `toolmanifest.vdf` (`commandline`, `require_tool_appid`):
   `<SLR4-arm64>/_v2-entry-point --verb=waitforexitandrun -- <Proton>/proton waitforexitandrun <exe>`.
 - Proton sets up VR (vrclient/wineopenxr registry) only when `SteamGameId` is set (steam_helper `setup_vr_registry`).
@@ -105,6 +144,100 @@
 - Processes started from Steam (Konsole, SSH sessions?) share steam.service's cgroup: use `systemd-run --user`.
 - SSH: `sshd` must be enabled (`sudo systemctl enable --now sshd`), which needs a user password (`passwd`).
 - mDNS: avahi-daemon runs by default; hostname `frame` → `frame.local`.
+- Desktop Mode menu entries (GitHub #84, agent v63): Linux apps get `~/.local/share/applications/frameport-<slug>.desktop`
+  (+ an executable copy in `~/Desktop` when that folder exists; Plasma starts executable `.desktop` files there
+  without a trust prompt), `Exec=env FRAMEPORT_DESKTOP=1 "<anchor>/launch.sh"`, marked `X-FramePort-Package=<pkg>`.
+  Plasma's launcher exits right after starting the program, so with `FRAMEPORT_DESKTOP=1` the Linux launcher skips
+  its "Steam parent gone → end the app" watchdog and keeps the desktop's DISPLAY/WAYLAND_DISPLAY instead of taking
+  gamescope's from Steam. Not yet tried from the Frame's Desktop Mode.
+- Linux apps' own icons (GitHub #99, agent v64): finalize_linux (and every refresh of the menu entries) copies the
+  app's icon to `<anchor>/artwork/app-icon.{png,svg}`: an AppImage's `squashfs-root/.DirIcon` (usually a symlink),
+  else the `Icon=` of its top-level `.desktop` file (a folder app: the first `.desktop` within 3 levels) looked up
+  next to it, in `(usr/)share/icons/hicolor/*/apps/` and `(usr/)share/pixmaps/`; the biggest PNG ≥128 px, else an
+  SVG, else the biggest PNG. Symlinks are resolved and must stay inside the app folder; absolute and `../` names
+  are ignored. Precedence for the menu entry's `Icon=` and the Steam shortcut's icon: the user's chosen/store icon
+  (`artwork/.icon-source` = `custom`, written by the PC with every art upload) > the app's own (Steam: PNG only) >
+  FramePort's placeholder (`artwork/icon.*`). `StartupWMClass=` is copied from the app's `.desktop` file (Plasma's
+  task bar matches the window to the entry). A PNG ≤1 MiB goes back to the PC (finalize result `app_icon.png`,
+  base64) and becomes the library's icon when the game has none and nothing was picked (`.app-icon` marker = its
+  sha256, no `.picked`); folder apps get it on the PC at add time (`analysis/linux.find_icon`). Not yet seen in
+  Desktop Mode on the device.
+
+## Video of the headset view (surveyed 2026-10-05; used by the Live view tab)
+- `steamvr-v4l2cam.service` (user unit, part of gamescope-session.target, `Restart=always`) runs SteamVR's
+  `/opt/steamvr/bin/linuxarm64/v4l2cam --output=99`: it reads the compositor's "Headset View" (IVRHeadsetView) and
+  writes it to a v4l2loopback webcam named **"SteamVR"** (`/dev/video99`, 1920x1080 RGB24, advertised 30 fps, frames
+  arrive at the display rate). Nothing on the Frame reads it by default; idle it costs nothing, read ~0.2 core.
+  It shows what the wearer sees (SteamVR home, Steam's panels; a game's layers are expected but not yet seen in it).
+  Black and ~1 fps (one frame per ~1.0 s) while the headset sleeps (standby): a 30 fps stream then repeats each
+  frame in bursts, which looks like a stall in a player. Its size follows SteamVR's headset view (v4l2cam has no size
+  option), so the live view only scales down (360p/480p/720p/1080p) or sends it as is ("full").
+- Sound: `pactl get-default-sink` (`alsa_loopback_device.stereo.alsa_output.platform-sound.HiFi__Speaker__sink`) and its
+  `.monitor` source carry what the headset plays; the Frame's ffmpeg has the `pulse` input and `aac`. Timestamps: pulse
+  uses the wall clock, v4l2 CLOCK_MONOTONIC → `-ts mono2abs` on the v4l2 input. Don't force
+  `-use_wallclock_as_timestamps` on the pulse input: it stamped bursts of AAC packets with one time.
+- Steam's own game recording / Remote Play / broadcast capture the **gamescope** PipeWire node (`CDesktopCapturePipeWire:
+  ... node path: gamescope`): with gamescope's `--backend openvr` that's only the flat Steam UI, not VR. Steam's arm64
+  `libvideo.so` encodes with x264 (vaapi/nvenc paths don't apply). No cast/spectator feature for the Frame's own VR view
+  exists in Steam's UI; the SteamVR web server (27062) has no mirror route.
+- Encoding: the Qualcomm encoder (`/dev/video23` qcom-iris-encoder, V4L2 M2M) doesn't work with the stock tools (ffmpeg
+  `h264_v4l2m2m` hangs, gst `v4l2h264enc` not-negotiated). ffmpeg + libx264 works: FramePort's live view
+  (`install/livestream.py`: `fps=30` before the scale, ultrafast/zerolatency, 3 threads, nice 10, fragmented MP4 on
+  stdout, + AAC 128k) measured 0.34 core at 720p / 0.56 at 1080p with a quiet picture (video only); expect ~1-1.4
+  cores with a busy scene. That is now only the fallback.
+- Hardware encoding (2026-10-07): the iris encoder works when driven directly through the V4L2 stateful encoder
+  interface. That is FramePort's `fp_venc` (`native/venc`, spec + every measured value in `native/venc/SPEC.md`).
+  Facts:
+  - Device: `/dev/video23` (`/dev/video-enc0` links to it), driver `iris_driver`, M2M multiplanar.
+  - Formats: input NV12/NV21/AB24(RGBA)/QC24/Q08C; output H264/HEVC; sizes 128..8192.
+  - NV12 layout (S_FMT answers):
+    - stride is a multiple of 128;
+    - the returned height is padded to a multiple of 32;
+    - CbCr starts at stride × padded height;
+    - sizeimage is rounded up to 4 KiB;
+    - the default crop is the requested size.
+  - Controls: CBR, FORCE_KEY_FRAME, PREPEND_SPSPPS_TO_IDR, HEADER_MODE joined, FRAME_SKIP_MODE, H.264 profiles
+    Baseline..Constrained High, levels up to 6.0.
+  - The `steamos` user can open it (group video).
+  - The panel's current refresh rate can be read without privileges through DRM: `/dev/dri/card0` is mode 0666, and
+    GETCRTC reports e.g. `2*2160x2160_96` (clock 1402720 kHz / 4448 × 3285 = 96 Hz) even while the headset sleeps.
+    The panel offers 72/80/90/96/108/120/144 Hz.
+  - `/dev/video99` (v4l2loopback) has `max_buffers=2`: a reader asking for more gets 2.
+  - Mid-stream keyframe requests (FORCE_KEY_FRAME) take effect on the next frame, and the GOP restarts from there.
+  - Measured 2026-10-07 with the headset asleep (still picture):
+    - `fp_venc` alone at 32/36 fps: 1% of a core at 1080p, 2.5% at 720p.
+    - Live view end to end: `fp_venc` 2.6% + ffmpeg 8.4% (AAC encoding + muxing).
+  - Conversion cost per new picture (self-test, NEON, 2026-10-07):
+    - 1080p (no scaling): 0.6–1.0 ms.
+    - 720p (exact 3:2 fast path): 1.3–1.65 ms, down from 5.6 ms with the generic box loop (~11 ms at idle clocks).
+    - 360p (3:1 fast path): 0.7 ms.
+    - 480p: 2.8 ms; its 852-px width doesn't repeat cleanly, so it uses the generic path.
+    - At 36 fps with live content that is roughly 2–6% of a core.
+  - ffmpeg with raw H.264 on a pipe:
+    - `-framerate` is ignored.
+    - `-fflags nobuffer` loses the first seconds of tiny frames.
+    - Numbering frames from 0 (`setts`) with no input timestamps holds all output ~7 s next to pulse's audio.
+    - Arrival stamps alone (`-use_wallclock_as_timestamps 1`) bunch frames that are read together: gaps of 0–10 ms
+      and 45+ ms, seen in the headset test as dropped frames.
+    - What works: `-probesize 32 -analyzeduration 0 -use_wallclock_as_timestamps 1` on the input (ffmpeg reads it in
+      step with the audio), then `-bsf:v setts=ts=N*(1/fps)/TB` on the output (exactly even frames; audio still
+      0–N s alongside), plus `frag_keyframe` so that a requested keyframe starts a fragment.
+    - With sound, ffmpeg paces its inputs against each other and pulse's audio arrives later than the wall clock
+      (more while something plays). The video input then counts as ahead, and ffmpeg stops reading it for up to
+      0.7 s, so the writer blocks. That was the cause of 1080p dropping frames: busy 1080p replayed with sound took
+      34–47 s for 20 s of video. Video alone was fine; `nice`, `-raw_packet_size` and the input queue size didn't
+      matter. Shifting the video input back fixes it, but too far makes ffmpeg hold the video for interleaving and
+      release it in clumps: -1 s gave output gaps of up to 550 ms, a longer and stuttering delay in the browser.
+      -0.25 s is the measured sweet spot (no stalled writes at busy 1080p with sound, steady 50–150 ms output; -0.5 s
+      already clumps). Output audio/video spans stay equal because setts sets the output times.
+    - Browser delay (headless Chromium, 720p, 2026-10-07): muted about 0.2–0.35 s behind the newest data; with
+      sound about 1 s. Chrome keeps about 0.6 s of audio ahead and stalls below that, whatever the player does:
+      1.1× catch-up gave 8 stalls per 30 s, no speed-up 1–2, same average lag; 50 ms fragments didn't help. So the
+      player doesn't speed up while sound is on.
+  - Quality (owner's headset test, 2026-10-07): 3 Mbit/s CBR at 720p36 showed heavy compression artifacts. The
+    hardware path now uses VBR with a 1.5× peak (the encoder accepts BITRATE_MODE VBR + BITRATE_PEAK) and higher
+    targets: 360p 1.5, 480p 2.5, 720p 5, 1080p 8, Full 10 Mbit/s. The x264 fallback keeps its rates.
+  - The default sink is SUSPENDED while nothing plays; its monitor still delivers (silent) audio.
 
 ## Text input
 
@@ -116,3 +249,26 @@
   one everywhere (FramePort's "Type on Frame", agent `_keyboard`).
 - Unity text fields close without a system keyboard; see `frame.unity_text_input` in PLAYBOOK.md.
 
+
+## Monitoring sources (probed 2026-10-07, SteamOS 0.4.3, kernel 6.18; used by the Monitor tab, agent `_monitor`)
+
+All readable by the steamos user without root; the agent reads them directly (no programs started per sample).
+
+| Metric | Source | Notes |
+|---|---|---|
+| CPU | `/proc/stat` deltas; `cpufreq/policy{0,2,5,7}` | 8 cores in 4 clusters: 0-1 / 2-4 / 5-6 / 7 (max 2.27 / 3.15 / 2.96 / 3.05 GHz) |
+| GPU busy | Sum of `drm-engine-gpu` (ns) deltas in `/proc/<pid>/fdinfo/<fd>` over every render-node fd (msm DRM) | Gives GPU % per process too. A process can hold several render fds: add them all. Lepton games see the node as `/dev/kgsl-3d0` (bind mount of `/dev/dri/renderD128`). `drm-total-memory` reads 0 |
+| GPU clock | `/sys/class/devfreq/3d00000.gpu/{cur,max}_freq` | 231–903 MHz in 12 steps |
+| Memory / pressure | `/proc/meminfo`; `/proc/pressure/{cpu,memory,io}` (`some avg10`) | 16 GB RAM, 8 GB swap |
+| Temperatures | `/sys/class/thermal/thermal_zone*/{type,temp}` | 48 zones: `cpu*`/`cpuss*`, `gpuss-*`, `ddr`, `nsph*` (NPU), `pm8550*`/`pm8010*` (power ICs), `modem*`, `camera*`, `video`, `max1720x_bat*` |
+| Fan | hwmon `slg4ax46073v` `fan1_input` | ~8200 rpm idle |
+| Power | hwmon `max34417_*` `power{1-4}_{label,input}` (µW) | `vph` = whole system (~3.6 W idle), `gfx` = GPU, `apc0/1/2` = CPU clusters, `nsp1/2` = NPU; each read is an I2C transfer (~0.7 ms wall), so only these are read |
+| Battery | `power_supply/max1720x_bat_7-36` | `current_now` (µA, negative = draining) × `voltage_now` (µV) = watts; `time_to_empty_now`/`time_to_full_now` (s), `cycle_count`, `health`, `temp` (0.1 °C) |
+| Game fps | `<base>/launch.log` lines `FrameBridge: pacing: N fps …` (every ~5 s) | Quest games only; SteamVR writes PC VR frame stats only as an end-of-session summary in `vrcompositor.txt` |
+| Game container | conmon `-n lepton-steamlaunch-<appid>`; its child's `/proc/<pid>/cgroup` → `cpu.stat`, `memory.current` | The container's ~90 Android processes show as uid 1000 on the host and can be signalled (4XVR, 2026-10-07); Android names them after the package's last 15 characters (`lus4xvrplayerov`), the full name is in `cmdline` |
+
+Cost: a naive sample (fds of ~520 processes scanned) took 43 ms CPU. With kernel threads skipped after their first
+sighting, command lines checked once per process, render fds cached (rescanned every 60 s, every 4 s for busy young
+game processes without one), temperatures every 2 s, the CPU-cluster power rails every 5 s and the battery gauge every
+2-10 s, the stream measured ~10-13 ms CPU per 1 s tick on the device (idle clocks; idle or with 4XVR running) = about
+1 % of one core, ~0.15 % of the whole CPU. The I2C sensors (power monitors, battery gauge) are the slowest reads.

docs/GAMES.md

@@ -7,65 +7,99 @@ Generated from [catalog/games](../catalog/games) by `scripts/compat_list.py`.
 | Game | Platform | Status | Notes |
 |---|---|---|---|
 | 4XVR Video Player | Quest | ✅ Works |  |
+| Accounting+ | Quest | ✅ Works |  |
+| AgeOfJoy | Quest | ✅ Works |  |
 | AllInOneSports | Quest | ✅ Works |  |
 | Asgard's Wrath 2 | Quest | ✅ Works |  |
 | BAM | Quest | ✅ Works |  |
 | BARTENDER VR SIMULATOR | Quest | ✅ Works |  |
 | Batman: Arkham Shadow | Quest | ✅ Works |  |
 | BattleGlide | Quest | ✅ Works |  |
+| BattleSisters | Quest | ✅ Works |  |
+| Beat Saber | Quest | ✅ Works |  |
 | Beat Saber | Quest | ✅ Works |  |
 | Beat Saber (co-existence build) | Quest | ✅ Works |  |
 | Blade & Sorcery: Nomad | Quest | ✅ Works |  |
+| BodyCombat | Quest | ✅ Works |  |
+| BONELAB | Quest | ✅ Works |  |
 | Carve Snowboarding | Quest | ✅ Works |  |
 | Cook-Out | Quest | ✅ Works |  |
+| Creed | Quest | ✅ Works |  |
 | Demeter | Quest | ✅ Works |  |
 | Dinosaur Island | Quest | ✅ Works |  |
 | Espire 2 | Quest | ✅ Works |  |
 | Genotype | Quest | ✅ Works |  |
+| GORN2 | Quest | ✅ Works |  |
+| Gravity Lab | Quest | ✅ Works |  |
 | H.U.N.T | Quest | ✅ Works |  |
+| I Am Cat | Quest | ✅ Works |  |
 | I Am Monkey | Quest | ✅ Works |  |
 | In Death: Unchained | Quest | ✅ Works |  |
+| Into The Radius 2 | Quest | ✅ Works |  |
 | Job Simulator | Quest | ✅ Works |  |
+| Jurassic World Aftermath Collection | Quest | ✅ Works |  |
 | Keep Talking and Nobody Explodes | Quest | ✅ Works |  |
+| Lambda1VR | Quest | ✅ Works |  |
 | LEGO® Bricktales | Quest | ✅ Works |  |
+| Lucky's Tale | Quest | ✅ Works |  |
 | Marvel's Deadpool VR | Quest | ✅ Works |  |
+| Marvel's Iron Man VR | Quest | ✅ Works |  |
+| Max Mustard | Quest | ✅ Works |  |
 | Medieval Dynasty New Settlement | Quest | ✅ Works |  |
+| Metro Awakening | Quest | ✅ Works |  |
 | Mobile Suit Gundam: Silver Phantom | Quest | ✅ Works |  |
 | Nano | Quest | ✅ Works |  |
 | NEX Player | Quest | ✅ Works |  |
 | NOPE CHALLENGE | Quest | ✅ Works |  |
+| palazzo_santacruz | Quest | ✅ Works |  |
 | Path of the Warrior | Quest | ✅ Works |  |
+| Pistol Whip | Quest | ✅ Works |  |
+| Please Don't Touch Anything | Quest | ✅ Works |  |
 | PowerWash Simulator VR | Quest | ✅ Works |  |
+| QuestCraft | Quest | ✅ Works |  |
+| Retronika | Quest | ✅ Works |  |
+| Richie's Plank Experience | Quest | ✅ Works |  |
 | Rick and Morty: Virtual Rick-ality | PC VR | ✅ Works |  |
 | Riven | Quest | ✅ Works |  |
 | Robo Recall | Quest | ✅ Works |  |
+| RUINSMAGUS | Quest | ✅ Works |  |
+| Sniper Elite VR | Quest | ✅ Works |  |
 | Sniper Elite VR: Winter Warrior | Quest | ✅ Works |  |
 | Space Pirate Trainer Quest | Quest | ✅ Works |  |
+| Star Wars Pinball VR | Quest | ✅ Works |  |
 | Stremio | Quest | ✅ Works |  |
 | SUPERHOT VR | PC VR | ✅ Works |  |
 | SUPERHOT VR | Quest | ✅ Works |  |
+| TetrisEffect | Quest | ✅ Works |  |
+| The Boys VR | Quest | ✅ Works |  |
 | The Climb 2 | Quest | ✅ Works |  |
+| The Room VR | Quest | ✅ Works |  |
+| The Tale of Onogoro | Quest | ✅ Works |  |
+| Time Crisis VR (Experimental) | Quest | ✅ Works |  |
 | Toy Master | Quest | ✅ Works |  |
 | Under Cover | Quest | ✅ Works |  |
+| Vader Immortal: Episode I | Quest | ✅ Works |  |
+| VR HOT Quest | Quest | ✅ Works |  |
 | VR4 | Quest | ✅ Works |  |
+| Walkabout Mini Golf | Quest | ✅ Works |  |
 | Wallace & Gromit in The Grand Getaway | Quest | ✅ Works |  |
+| Waltz of the Wizard: Extended Edition | Quest | ✅ Works |  |
 | Wander | Quest | ✅ Works |  |
-| Accounting+ | Quest | ⚠️ Works with issues | Starts in VR, but doesn't get past its "press any button" screen. |
 | Arcsmith | Quest | ⚠️ Works with issues | Right eye distorts during movement (unresolved; swap, tracking, Valve layers, depth and pacing ruled out). |
 | Assassin's Creed Nexus | Quest | ⚠️ Works with issues | Some launch warning text is still upside down; the rest of the UI is fixed by flip emulation. |
-| I Am Cat | Quest | ⚠️ Works with issues | The view vibrates slightly, even when holding still. |
-| Lucky's Tale | Quest | ⚠️ Works with issues | Runs out of memory within a few minutes and freezes the Frame until the game is killed. |
+| Does it Stack? | Quest | ⚠️ Works with issues | Mixed reality mode does not work (works on Demeo), everything else seems to be OK |
+| Doom3Quest | Quest | ⚠️ Works with issues | PDA shows black screen. |
 | Myst | Quest | ⚠️ Works with issues | Minor graphical glitches on some objects. |
 | Phantom: Covert Ops | Quest | ⚠️ Works with issues | DLC/store button crashes (no Meta store). |
-| QuestCraft | Quest | ⚠️ Works with issues | The launcher runs, but Minecraft crashes while starting its graphics (OpenGL error 1282). |
+| Pinball FX VR | Quest | ⚠️ Works with issues | Plays; mixed reality mode not working yet. |
 | Silhouette | Quest | ⚠️ Works with issues | Hand-tracking game; the Frame synthesizes hands from controllers, so it is janky. |
+| The Light Brigade | Quest | ⚠️ Works with issues | Judder in weapons |
 | Time Stall | Quest | ⚠️ Works with issues | Both eyes distort during movement (unresolved). |
 | WiiCompiled VR | Quest | ⚠️ Works with issues | To add a game: in FramePort's Files tab, upload your .wcgame file to this game's storage, folder Android/data/org.wiicompiled.quest/files/WiiCompiledOpenXRVR… |
-| BONELAB | Quest | ❌ Doesn't run | Crashes while starting its graphics (Vulkan); no fix yet. |
+| BlazeRush | Quest | ❌ Doesn't run | Starts and reaches the menu room, but the room shows no controllers and ignores all input (it all reaches the game); no fix yet. |
 | Espire 1: VR Operative (Quest Edition) | Quest | ❌ Doesn't run | Mesa GL driver crash during texture upload. |
 | HITMAN 3 VR: Reloaded | Quest | ❌ Doesn't run | Vulkan driver crash (freedreno), even without Valve layers. |
 | Journey of the Gods | Quest | ❌ Doesn't run | 32-bit only; the Frame has no AArch32. |
 | Roblox | Quest | ❌ Doesn't run | Crashes on its first VR frame on the Frame. |
 | Shadow Point | Quest | ❌ Doesn't run | 32-bit only; the Frame has no AArch32. |
-| Sniper Elite VR | Quest | ❌ Doesn't run | GPU hang (zink: DEVICE LOST) even with MSAA off. |
 | Sports Scramble (Santa Cruz) | Quest | ❌ Doesn't run | 32-bit only; the Frame has no AArch32. |

docs/INSTALL.md

@@ -49,6 +49,20 @@ The Frame and the computer must be on the same network.
 and approve it on the Frame (Valve's own devkit pairing; it only sends this computer's key to the Frame). Install
 Lepton from the Steam Frame page afterwards if it's missing.
 
+### With a USB cable
+
+For networks that block the setup (guest Wi-Fi, firewalls, discovery not working), and for faster uploads:
+
+1. On the Frame, turn on **Developer Mode** (Settings → System → Developer Mode). The Frame's USB network only exists
+   in Developer Mode.
+2. Connect the Frame's USB-C port to the computer.
+3. In FramePort: **Steam Frame → Set up with a USB cable**. FramePort detects the cable and shows the setup command,
+   which reaches the computer over the cable. Already set up? It connects over the cable right away.
+
+The cable needs no driver on Windows 10/11, macOS or Linux, and the computer gets an address from the Frame
+automatically. Uploads use the cable whenever it's plugged in (about 37 MB/s, ~3× typical Wi-Fi), even when FramePort
+connected over Wi-Fi. Unplug it any time: FramePort finds the Frame on Wi-Fi again by itself.
+
 ### Firewalls
 
 If the setup command only says "timed out", a firewall on your computer blocks the Frame; the setup page
@@ -71,13 +85,50 @@ which would end Desktop Mode). This is new: please report anything odd with **Re
 - If the Frame goes to sleep, turns off or leaves the Wi-Fi, the queue **waits** and continues once it's back; uploads
   pick up where they stopped. While installs run, FramePort keeps the Frame from going to sleep. Before a large batch
   it checks the Frame has enough free space.
+- **microSD card / other drives:** the **Steam Frame** page's **Storage** section lists the Frame's drives and sets
+  where new games go (**Install new games to**). Games go into a `FramePort` folder on the card. To move a game that's
+  installed already, right-click it → **Move to…** (the game must be closed; saves, settings and the Steam entry stay).
+  A game on the card only starts while the card is inserted (FramePort then says "SD Card not inserted"). Cards
+  formatted as FAT, exFAT or NTFS can't hold games: format the card in SteamOS first.
 - Your own game files are never changed. The converted copy is temporary: it's removed once the game is on the Frame
   (Settings → Installing: keep them, or remove all now).
 - **Game settings…** (game menu or the Steam Frame page): sharpness, refresh rate, controllers, menus, 360° video and
   mixed-reality options in plain words, only those that matter for the game. Changes are kept with the game and,
   when it's installed, used the next time it starts.
 - Ordinary Android apps (no VR) are installed unchanged and shown as a flat window in the headset. Android's
-  back/home/recents buttons are hidden by default (patch **Hide Android's navigation bar**).
+  back/home/recents buttons are hidden by default (patch **Hide Android's navigation bar**). If FramePort guesses
+  wrong (a phone app shows nothing in the headset, or a VR app opens as a flat window), choose **VR** or **Flat
+  window** under **Show as VR or as a flat window** in the game's **Customize** section, then **Update on Frame**.
+- **Add games → Add a Windows program (.exe)…** adds a single Windows program; the Frame runs it through Proton (as a
+  window unless it is a VR game). A program sitting in Downloads, the home folder or a drive root is copied on its
+  own first, so the install doesn't upload everything next to it.
+- In the packaged app you can also **drag files onto the Library**: APKs, Linux apps (AppImage, `.zip`/`.tar.gz`),
+  Windows programs (`.exe`), folders, or a FrameDrop manifest (`.json`).
+
+### Install links ("Install with FrameDrop" buttons)
+
+Some developers put an **Install with FrameDrop** button on their site (the one-click protocol of the FrameDrop
+sideloader, documented at framedropvr.com/docs). FramePort understands the same links:
+
+- **Clicking a button** opens FramePort (or the window that's already open) on Windows and Linux. FramePort shows
+  the title, the files, their size and whether a checksum is given, and asks before it downloads anything. Then it
+  downloads the build, adds it to your library and starts the usual install on the Frame. If no Frame is connected,
+  the game is added now and installs once the Frame is back.
+- **Add games → Install from a link…** takes the button's address (right-click → Copy link), a `framedrop://` or
+  `frameport://` link, a manifest (`.json`) or a direct link to an APK, a Linux build or a Windows program. Use it on
+  macOS, where web pages can't hand links to FramePort yet.
+- **Settings → Install links** has one switch for `framedrop://` links (the buttons) and one for FramePort's own
+  `frameport://` links. Both are on by default. If FrameDrop is installed too and already opens `framedrop://`
+  links, FramePort leaves them to it; **Use FramePort for these links** takes them over (turn the switch off to give
+  them back).
+- **For developers:** a FrameDrop manifest works as it is
+  (`{"schema": "framedrop.install/v1", "name": "…", "files": [{"url": "https://…", "sha256": "…"}]}`). FramePort
+  also reads an optional `"frameport": {"description": "…", "icon": "https://….png"}` object (FrameDrop ignores
+  it): the install question then shows the icon and description, and they become the game's icon and "About this
+  game" text when no store has them. Without a manifest (a bare file link) FramePort guesses the title from the
+  file name and replaces it with the app's own name once it's downloaded.
+- Only `https://` links to public servers are used (plain `http://` only on this PC, for testing); links with a
+  user name or password, or pointing into your local network, are refused. Only install from sites you trust.
 
 ![Game page](images/game.png)
 
@@ -88,10 +139,10 @@ reality), showing only what matters for that game. Changes are kept with the gam
 
 ## Typing on the Frame
 
-- **Type on Frame** (Steam Frame page, a game's menu, or the keyboard icon on the sidebar's Frame card): while the
-  window is open, this computer's keyboard works as a keyboard plugged into the Frame. Select a text field in the
-  headset (in an app, Steam or the desktop) and type; Esc and shortcuts go to the Frame too. Paste longer text into
-  the box to type it in one go (US keyboard layout). Click **Done** to disconnect.
+- **Type on Frame** (its own tab in the sidebar; also on the Steam Frame page and in a game's menu): while the tab is
+  open, this computer's keyboard works as a keyboard plugged into the Frame. Select a text field in the headset (in
+  an app, Steam or the desktop) and type; Esc and shortcuts go to the Frame too. Paste longer text into the box to
+  type it in one go (US keyboard layout). Opening another tab disconnects the keyboard.
 - **Steam's on-screen keyboard** opens for text fields of apps shown as a window (2D apps, and VR apps with
   **Show the app's Android window**). Steam lists that window as **Gamescope** (the Frame's display compositor);
   leave it open: it's what receives the typing, the VR view isn't affected.
@@ -99,8 +150,27 @@ reality), showing only what matters for that game. Changes are kept with the gam
   **Make Unity text fields work** for them. The first time, it downloads Cpp2IL (a tool that finds the right spot in the
   game's code, ~17 MB). Games added before this version: open the game's menu → **Analyze again**, then reinstall.
 
+## Watching the Frame (Monitor)
+
+- **Monitor** (its own tab in the sidebar) shows live what the Frame is doing while the tab is open: the running game
+  with its frame rate (Quest games), CPU, graphics chip, memory, the hottest temperature with the fan speed, power
+  draw and battery time left, each with a 2-minute chart. **Show details** adds every CPU core, all temperature
+  sensors, where the power goes and the network.
+- **Processes**: **Game** (default) lists the running game's processes, **Steam & SteamVR** and **All** show more.
+  Right-click a process (or use **⋯**) to end it, force-kill it or end its whole game; **End game** on the game card
+  closes the game the way Steam's Exit game does. A lock marks programs whose end would close Steam, SteamVR or the
+  desktop: FramePort asks again before ending those.
+- The numbers come every second (or every 2/5 s) and cost the Frame about 1 % of one CPU core; nothing keeps
+  running on the Frame after you leave the tab.
+
 ## Updating
 
+**Game configs** (the tested recipes in the catalog) update by themselves: FramePort checks GitHub every 6 hours for
+newly confirmed or fixed configs and uses them without a FramePort update; a game whose recipe changed then shows
+**Update on Frame**. Configs that need a newer FramePort are skipped until you update. Settings → Data shows the last
+check (**Check now**) and turns this off.
+
+
 FramePort checks for a new release at start and every 6 hours (it only downloads the release information). When one
 exists, the Library shows **Update now**: FramePort downloads the new version, verifies it against the release's
 `SHA256SUMS.txt` (on Windows also the signature), restarts and opens as the new version. Games, settings, signing keys
@@ -110,6 +180,10 @@ Settings → **Updates**: turn the check off, or turn on **Install updates autom
 installs at the next start). If FramePort's folder isn't writable, **Update now** opens the release page instead. The
 update log is `logs/update.log` in the data folder.
 
+**Dev builds:** when you're asked to test a fix before it's released, use Settings → Updates → **Install the latest
+dev build…**. It shows what to test, then installs like an update (same checks). Dev builds are less tested; the next
+release is offered to you as a normal update.
+
 Command line: `frameport update` (`--check` only checks, exit code 10 = update available; `--yes` doesn't ask).
 `FRAMEPORT_NO_UPDATE_CHECK=1` turns all checks off.
 
@@ -132,12 +206,35 @@ starts it if asked). FramePort installs it on the Frame and Proton runs it as a
 it shows up in the Frame's Steam library tagged "Windows game on Frame". Whether a game runs depends on Proton on ARM
 (x86 games run through emulation).
 
+## Linux apps
+
+The Frame runs SteamOS on an arm64 CPU, so native Linux apps built for **aarch64/arm64** run on it directly (no
+Android container, no Proton). **Add games → Add a Linux app…** takes an AppImage or a `.zip`/`.tar.gz`/
+`.tar.xz` archive; **Add a Linux app folder…** takes an unpacked app. FramePort finds the program that starts it (the
+game page's **Change…** picks another one) and whether it's a VR (OpenXR) app. **Install on Frame** uploads it
+unchanged and adds it to the Frame's Steam library, tagged "Linux app on Frame"; Play, launch tests and Uninstall
+work like for other games.
+
+- **x86_64 builds** run through **FEX**, Valve's x86 translator, with the x86 system libraries SteamOS ships for it
+  (the way Steam on the Frame runs x86 Linux games). The first install of one installs FEX on the Frame (Steam
+  restarts once and downloads it, a few MB). They run slower than arm64 builds: when an app offers both, FramePort picks the arm64 one. The game
+  page shows which CPU a build is for.
+- The app must bring the libraries SteamOS doesn't have (checked for arm64 builds; x86_64 builds use FEX's x86
+  system, which has glibc and Mesa, and aren't checked ahead). If some are missing, the install reports them and the game
+  page lists them: look for a build that includes them.
+- **Desktop Mode:** Linux apps also appear in Desktop Mode's application menu and as an icon on its desktop. Some
+  apps work better there, with a mouse and keyboard, than in Gaming Mode (where Steam Input turns the controllers into
+  a gamepad). Switch it off per app on the game page (**Desktop Mode**).
+- From the command line: `frameport add-linux <AppImage, folder or archive> [--exe <program>]`.
+
 ## Files on the Frame (videos, documents, mods, saves)
 
 The **Files** tab manages files on the Frame over the same connection as installs; no other transfer app is needed.
 Pick a location, browse folders, and use **Upload files** / **Upload folder**, **New folder**, or the download, rename
-and delete buttons on each entry. Tick several entries (or the box above the list for all) to download or delete them
-together. In the downloaded app you can also drag files and folders from Explorer / Finder / your file manager onto
+and delete buttons on each entry. Right-click an entry (or the empty space) for the same actions in a menu. Tick
+several entries (or the box above the list for all), or click and drag across them, to download or delete them
+together; a right-click on one of them then acts on all. The **Screenshots** tab and the **Library** work the same
+way: right-click for a menu, drag across cards to select several. In the downloaded app you can also drag files and folders from Explorer / Finder / your file manager onto
 the list to upload them into the open folder. Uploads and downloads run in the Activity panel, resume after an interruption and
 skip files that are already there.
 
@@ -167,11 +264,14 @@ and `frameport <command> --help` describe every option. The main ones:
 | Command | What it does |
 |---|---|
 | `scan <folder>` / `list` / `show <game>` | add games, list the library, show a game's analysis and patches |
+| `add-linux <path>` | add a Linux app, arm64 or x86_64 (AppImage, folder or archive) |
 | `recipe <game> --enable/--disable <patch>` | change a game's patches (`patches` lists them all) |
 | `build <game>` / `install <game>` / `test <game>` | build, install on the Frame (`--to pc` for PC VR on this PC), launch test |
 | `frame discover` / `frame connect` / `frame info` | find, pair with and describe the Frame |
 | `frame send` / `frame storage` / `frame cleanup` | copy files to the Frame, show where they go, free space |
+| `frame drives` / `frame move <game> --to <drive>` / `install --dest <drive>` | the Frame's drives (microSD), move a game, install to a drive |
 | `tools status` / `tools install` | the tools FramePort downloads |
+| `open-link "<link>"` | install from an "Install with FrameDrop" button's address or a manifest/APK/zip link (`--yes`, `--no-install`) |
 | `diag report <game>` / `share-recipe <game>` | report a problem / share a working recipe |
 | `update` | update FramePort |
 

docs/PLAYBOOK.md

@@ -13,11 +13,28 @@ version is `catalog/triage.yaml` (used by `frameport test` / the Job screen); ke
 ## Startup failures (visible in launch.log)
 | Symptom | Cause | Fix |
 |---|---|---|
+| A launch test suggests a fix (e.g. triage `sdl-no-clipboard` → `frame.sdl_clipboard`) but the game page doesn't show it / lists it as not applicable; or a game added long ago lacks warnings newer ones get (Android version, web wrapper, missing OBB) (GitHub #104, Dramatic Shape) | the library entry was analysed by an older FramePort: the analysis field the patch reads (`sdl_java`, `min_sdk`, `web_wrapper`, `expects_obb`, …) is missing, so `applies()` is false | entries whose `analysis.extra.analysis_version` is below `detect.ANALYSIS_VERSION` are analysed again at the GUI's start (background) and before a build (`pipeline.refresh_analyses`); by hand: game menu → "Analyze again", then Update on Frame. An unreadable APK is marked `analysis_failed` (retried after the next version bump). Adding an analysis field: bump `ANALYSIS_VERSION` |
+| One eye (usually the right) shimmers or jitters in the 3D view while menus and panels look steady; pacing is clean (GitHub #69, e.g. RTCWQuest, Moss) | Valve's eye-tracked foveation layer (`VALVE_fdm_injection`) moves its low-density regions with each eye's gaze, and the right eye's gaze filter restarts often (`CEyePoseUKF R: Large dt … Bootstrapped` in `~/.local/share/Steam/logs/eyetracking.txt`) | Customize → "Eye-tracked foveation (Valve)" (`device.foveation`): **Fixed** (`FDM_DEBUG=disable_offsets`, keeps the GPU saving) or **Off** (`VK_INSTANCE_LAYERS=""`); catalog field `foveation:` |
+| A Unity OpenXR game closes right after the OpenXR instance is created: `F VrApiLoader: vrapi_SetPropertyInt was called before vrapi_Initialize()!`, SIGABRT on UnityMain (GitHub #62, Jurassic World Aftermath) | the APK still ships Meta's VrApi loader; OVRPlugin (1.89, on OpenXR) calls it without starting VrApi and Meta's loader aborts. The VrApi bridge can't replace it (39 of the loader's 114 functions: OVRPlugin wouldn't link) | `frame.vrapi_stub` (same exports, each returns 0); triage `vrapi-before-init` |
+| A VrApi game exits at once: `UnsatisfiedLinkError … dlopen failed: cannot locate symbol "vrapi_PollEvent"` (GitHub #57, BlazeRush) | the engine imports a VrApi function the VrApi bridge didn't implement | the bridge has `vrapi_PollEvent`, `RecenterPose`, `SetDisplayRefreshRate`, `GetSystemPropertyFloatArray` (rebuild the game); the static check "VrApi functions resolvable" names any other missing one; triage `vrapi-symbol-missing` |
+| A Team Beef port (Lambda1VR, RTCWQuest, …) exits at once: `UnsatisfiedLinkError: dlopen failed: library "libopenxr_loader_valve.so" not found` (GitHub #59) | TBXR loads `openxr_loader_<Build.MANUFACTURER>` (Lepton: valve) and takes the Meta path only when `strstr(OPENXR_HMD, "meta")` matches, else Pico's | `frame.tbxr_vendor` (empty `libopenxr_loader_valve.so` + the "meta" literal → "alve"). Game data (`xash/`, …) goes to /sdcard: upload it with the Files tab to the game's storage. Black eyes with `TBXR: Incomplete frame buffer object: GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE`: TBXR always uses multisampled render-to-texture (even `--msaa 1`); `frame.tbxr_vendor` links the GL shim, which hands it single-sampled versions (log `GL shim: multisampled render-to-texture … drawn single-sampled`) |
+| Logos and a loading animation, then black (no crash, frames keep coming) in a game whose OBB folder has extra `*.pak` files (GitHub #61, Star Wars: Tales from the Galaxy's Edge: seasons + Wwise banks) | the game asks Meta's platform for these asset files (`ovr_AssetFile_GetList` / `DownloadById`); OVRPort's loader doesn't know them, so the content never "arrives" | `frame.asset_files` (native/langpack lists the data's `*.pak` as installed `default` assets, IAP `free`, and answers DownloadById at once with the path; off: env FRAMEPORT_ASSET_FILES=0) |
+| `cannot locate symbol "ovrPeerConnectionState_ToString"` (or another `ovr<Enum>_ToString`) at start (BlazeRush, GitHub #57) | OVRPort's platform loader lacks several Platform SDK enum helpers | `frame.ovrstubs` now stubs them too; `*_ToString` stubs return "" (not NULL) |
+| Exits right after the OpenXR instance is created: `Failed to create XR session: -50` (`XR_ERROR_GRAPHICS_REQUIREMENTS_CALL_MISSING`, Lambda1VR) | the game skips `xrGet*GraphicsRequirementsKHR`; Meta's runtime tolerates it, SteamVR's doesn't. Lambda1VR's TBXR doesn't even enable `XR_KHR_opengl_es_enable` (only `XR_EXT_local_floor`) | FrameBridge adds `XR_KHR_opengl_es_enable` when an app enables no graphics API extension, asks for the requirements on the game's behalf and retries xrCreateSession once (logs `added XR_KHR_opengl_es_enable …`, `the app skipped …; asked for it`; every launch logs the final extension list `xrCreateInstance with N extension(s)`); triage `graphics-requirements-missing`. Verified headless: Lambda1VR runs at 72 fps |
+| Exits at start: `OVRAvatar-Loader: DisplayErrorAndExit: Failed to launch SystemActivities` after `ovrAvatar_Initialize: Failed to load AvatarSDK driver` (BlazeRush, GitHub #57) | Meta's avatar loader needs Horizon; it then tries Meta's error screen and aborts | `frame.avatar_stub` (same exports, do nothing); triage `avatar-driver-missing`. Games that ship the library but don't start avatars at launch (Lucky's Tale, BattleSisters, Arcsmith) don't need it |
+| Frame freezes or the game is killed (OOM) on the first controller vibration (e.g. Lucky's Tale's save slots, BattleSisters, Sniper Elite VR's tutorial grab: memory grows ~1 GB/s until the kill) | OVRPort runtimes up to 3.4.3-23204ea read the haptic envelope's duration (ns) as seconds and allocate gigabytes of samples (GitHub #9, ovrport/app#73); also reached from Unity's legacy `ovrp_SetControllerHaptics`; perf page faults all in `libopenxr_loader.so` `xrApplyHapticFeedback` | `adapter.haptic_fix` (envelope → one plain vibration in `native/xrshim`; PCM vibrations (`XrHapticPcmVibrationFB`) are converted the same way). Fixed in runtime 3.4.3-aa54c3f: builds made with it leave the workaround out by themselves (log "not needed: adapter.haptic_fix", `frameport show` "last build left out"); rebuild an older build to switch |
+| Controller vibrations much stronger than on a Quest (The Boys VR, Jurassic World, BONELAB, …) | OVRPlugin games send amplitude envelopes; `haptic_fix` turned each into one vibration at the envelope's *peak* for its whole duration (a short fading pulse became a long full-strength buzz) | `haptic_fix` now uses the envelope's RMS; Game settings → "Vibration strength" (`haptic_scale`, 0-1) scales every vibration in FrameBridge; launch.log shows the first requests (`haptic: …`). OVRPlugin stops a vibration with amplitude 0 (2 s duration): FrameBridge turns that into xrStopHapticFeedback (without it the last buzz ran its full 2 s) |
+| Play or a launch test fails at once: `Game files missing at <path> (storage not mounted?)` in launch.log, or "… files are on a drive that isn't inserted" (GitHub #90) | the game was installed or moved to a microSD card (`<mount>/FramePort/<pkg>`) that isn't inserted or mounted now | insert the card; or move the game back (game menu → Move to…, `frameport frame move <pkg> --to internal`) once the card is back. `frameport frame drives` shows what the agent sees (exFAT/NTFS cards are refused: format in SteamOS) |
+| A Linux app started from Desktop Mode's menu closes after ~2 s, or opens on the wrong display (GitHub #84) | its launcher predates agent v63: the "Steam parent gone" watchdog ended it when Plasma's launcher exited, and it took gamescope's DISPLAY from Steam | connect FramePort once (agent v63's `upgrade_launchers` adds the `FRAMEPORT_DESKTOP` checks; the menu entry runs `env FRAMEPORT_DESKTOP=1 <anchor>/launch.sh`). Game Mode controller problems in such apps are Steam Input's (a separate issue) |
+| A Linux app (AppImage) shows no/FramePort's placeholder icon in Desktop Mode or Steam (GitHub #99) | before agent v64 only FramePort's art set's icon was used, and a lone AppImage has no store art | connect FramePort once (agent v64 copies the app's `.DirIcon` / `.desktop` `Icon=` to `<anchor>/artwork/app-icon.*` and refreshes the menu entry); reinstall to also get it into the library + Steam shortcut. Still the placeholder: check `<base>/app/squashfs-root/.DirIcon` and the `.desktop` file's `Icon=` (an icon outside the app folder or only an XPM isn't used); a chosen icon (`artwork/.icon-source` = `custom`) always wins |
 | Every game suddenly fails to start: `crun: create keyring …: Disk quota exceeded`, `is not a running context` | rootless podman leaked a kernel keyring per launch; 200-key quota exhausted | `keyring = false` in `~/.config/containers/containers.conf` (FramePort agent does it), then reboot the Frame once |
 | A Unity app's text field shows a caret for a moment and loses focus; no keyboard appears (e.g. Stremio VR login) | Unity's TMP_InputField/InputField wait for Android's on-screen keyboard and close themselves without one (Lepton has none); headless VR apps also have no focused Android window, so no key press reaches them | `frame.unity_text_input` (Cpp2IL finds `TouchScreenKeyboardShouldBeUsed`/`isKeyboardUsingEvents`, rewritten to false/true) + `device.text_input_window` (lepton-show-flatscreen: Steam's keyboard and Type on Frame work) |
+| Play gives Steam's "Game configuration unavailable"; Steam's console_log: `GameAction [AppID <id>] … RequestingLicense → UpdatingAppInfo → LaunchApp failed with AppError_9` | this Frame's Steam never loaded FramePort's shortcuts.vdf entry (it treats the id as a store app); cause unknown (GitHub #21/#30) | automatic since agent v43: Play registers the game through Steam's devkit interface ("Devkit Game: …", `devkit_register`) and starts that; uninstall removes it. Agent v58: a devkit entry Steam forgot after a restart is added again live on Play (no NOT_IN_LIBRARY → no Steam restart), and installs/art updates of devkit games only copy art (no Steam restart, GitHub #41) |
+| Steam's Exit game leaves the game running (container `lepton-steamlaunch-<appid>` still up) | Steam stopped only its `reaper`; launch.sh and Lepton (setsid) never got a signal (GitHub #36) | agent v44: launch.sh's 2 s loop ends the game when its parent is gone (`upgrade_launchers` adds it to existing launchers); by hand: `podman kill lepton-steamlaunch-<appid>` |
 | Black screen at start while audio/ExoPlayer runs; log `xrEndFrame: dropped N unusable layer(s)`, a quad layer with swapchain 0x0 (e.g. I Am Monkey's intro video) | The game plays video into an Android-surface swapchain (XR_KHR_android_surface_swapchain); the Frame's runtime lists the extension but returns FUNCTION_UNSUPPORTED | adapter `surface_emul` (default on): FrameBridge gives the player a SurfaceTexture-backed Surface and copies each frame into an ordinary swapchain (log `surface_emul: …`) |
 | The game quits right after start: `Something failed to initialize. Quitting!` / `We don't have write permission to …/files/cloud/data` (e.g. SUPERHOT) | The game created a save folder with mode 1700; inside Lepton the app writes through the folder's group | launch.sh `fix_perms` adds owner + group write to every folder in the game's storage (agent 41); reinstall to get the new launcher |
 | The whole Frame slows to a halt, then the game is killed (`Out of memory: Killed process … anon-rss:10+ GB`), e.g. Lucky's Tale | The game's own memory grows ~1 GB/s on Unity's `Loading.PreloadManager` thread (perf page-fault profile); not the flat window, not the text-input patches | none yet: mark unsupported; profile with `perf record -p <pid> -e page-faults --call-graph fp` (works as steamos, `perf_event_paranoid` 2) |
+| A Linux app exits at once: `cannot execute binary file: Exec format error` in launch.log | an x86_64 program started directly (installed before FramePort ran x86 builds through FEX, or by hand) | reinstall it: x86_64 Linux apps install FEX on the Frame and start through it (agent v61, `kind: linux_x86`; FEX also needs `STEAM_COMPAT_DATA_PATH`: "No compat data path?" in launch.log = an agent v60 launcher, reinstall); triage `linux-x86-no-fex`. Prefer an arm64 build when the app offers one |
 | `APP_ACTIVITY is empty`, nothing starts | Manifest has category INFO only; Lepton needs LAUNCHER | `frame.launcher` (automatic) |
 | PC VR game on the Frame shows as a flat window / Revive: `Unable to load LibOVRRT DLL` / `LoaderInstance::CreateInstance chained CreateInstance call failed` | Frame SteamVR runtime rejects OpenXR apiVersion 1.1 (`XR_ERROR_API_VERSION_UNSUPPORTED`), which Proton 11's VR helper requests | `pcvr.xr_timefix` (Frame OpenXR layer, default on): retries xrCreateInstance as 1.0 |
 | Unreal PC VR game on the Frame runs as a flat window although OpenXR works (no `LogHMD` OVRPlugin lines; Unreal logs nothing when it skips the Oculus plugin) / launch.log: `FramePort oculushmd: could not create the OculusHMDConnected event` | UE's OculusHMD (and LibOVR's `ovr_Detect`) only start when the Windows event `OculusHMDConnected` exists and is signalled; on a PC the Oculus service creates it. Revive hooks `OpenEventW` for it, but that relies on Detours patching Wine's (ARM64EC) kernelbase | `pcvr.oculus_unreal` (default for Unreal Rift games; PC VR counterpart of overport's `patch_oculus_unreal`): launch.sh runs the injector through `fp_oculushmd.exe`, which provides the real event until the game exits |
@@ -29,14 +46,21 @@ version is `catalog/triage.yaml` (used by `frameport test` / the Job screen); ke
 | PC VR game: `Failed to initialize Oculus API (-3001)` / `Unable to load LibOVRRT DLL` | Revive's LoadLibrary hook doesn't work under Proton arm64 (ARM64EC kernelbase); the game's LibOVR shim finds no runtime DLL | Symlink `LibOVRRT64_1.dll` → Revive's DLL in the prefix's system32 (manual so far) → then -3021 (runtime signature check; open) |
 | Uploads to the Frame are slow (~15 MB/s) | PC and Frame both on Wi-Fi through the home router | Connect the PC to the Frame's own hotspot (or a USB cable): FramePort uses the direct link automatically (~80-100 MB/s); job log line "Transfer link" |
 | PC VR game exits right away: `Unhandled Exception: 0xc06d007e` (after `FOnlineSubsystemOculus::InitWithWindowsPlatform`) | Delay-loaded `LibOVRPlatform64_1.dll` (Oculus Platform SDK, installed with the Oculus app) is missing | None on the Frame (entitlement check; FramePort doesn't replace it). PC mode with the Oculus app |
+| Unity PC VR game (Oculus + SteamVR build: `OVRPlugin.dll` and `openvr_api.dll` in `<Name>_Data/Plugins`) opens a window and quits after ~20 s; no VR Vulkan instance after the game's DXVK device in launch.log; Unity log (`unity log … Player.log`, agent v67): `OpenVR failed initialization` / `Initialization of device … failed` | Unity's built-in VR tries its SDKs in list order (Oculus first) unless `-vrmode` picks one; a catalog recipe verified with another build of the game (e.g. SUPERHOT VR's OpenXR build, GitHub #105) used to drop the build's own arguments | `pcvr.launch_args` = `-vrmode OpenVR` (detected for such builds; kept when the catalog's `xr` differs from the build's). A game's Electron launcher next to it (SHVR.exe) is ranked below the game |
 | Unreal PC VR game opens the crash reporter instead of closing | UE starts CrashReportClient.exe on a crash | `pcvr.no_crash_reporter` (default for Unreal Rift games): `-nocrashreports` + CrashReportClient.exe renamed `.disabled` in the Frame copy |
+| A backup's game was added without its data (library `data_dir` null, `data_bytes` 0) although the folder has .obb files | The OBBs sit in a layout the scan didn't know: `<game>/obb/<package>/`, `Android/obb/<package>/`, or SideQuest-style `<game>/apk/x.apk` + `<game>/obb/<package>/` | `sources/quest_dump.find_data_dir` finds a `<package>` folder with .obb files ≤3 levels below the APK's folder or ≤2 below its parent (skipping neighbouring folders with APKs: other games); an `apk`/`apks` folder counts as part of its game folder. Add the folder again (Analyze again doesn't look for data) |
+| Game hangs at start / never loads although its .obb files are right there: next to the APK, in an `obb` folder beside an `apk` folder inside a `<package>` folder, or a SideQuest backup (`<timestamp>_<versionCode>.apk`) (GitHub #85, #91) | No folder named after the package, so the folder-layout checks found nothing and no OBB was uploaded | `quest_dump.find_data` then looks for the files by name, `(main\|patch).<versionCode>.<package>.obb` (any case), in the APK's folder, its parent and up to 3 levels below each (folders with their own APKs are other games); prefers the folder and files of the APK's own versionCode, else the newest older, else any version. When that folder also holds other things (the APK itself, other games' OBBs), the library entry gets `data_files` and only those files are uploaded, counted and deleted with the game. Add the folder again |
+| Unreal game: `JNI_OnLoad` (OVRPlugin), then silence: no OpenXR instance, no crash, no frames (GitHub #85 TRIANGLE STRATEGY; launch-test finding `missing-obb`) | Installed without its OBB: the manifest says `com.epicgames.ue4.GameActivity.bHasOBBFiles` = true (UE5: `com.epicgames.unreal.…`) but the library has no data folder (`data_dir` null, `data_bytes` 0) | Put the .obb files in a `<package>` (or `obb/`) folder next to the APK, add the folder again, reinstall. Analysis `extra.expects_obb`; the game page, the install question and `frameport scan`/`install` warn; launch tests that sent no frames get the `missing-obb` finding from the library (the game logs nothing). Unity split-binary builds count too (`extra.unity_split`, `analysis/unity_split.py`): an XR-plugin build (Oculus XR Plugin / Unity OpenXR library) without `assets/bin/Data/UnitySubsystems/` in the APK, or BuildSettings listing more scenes than the APK has `levelN` files (globalgamemanagers loose or read from the head of data.unity3d); exact on the 48 Unity APKs of the dumps (13 split, 17 full games; OBBs of full builds are asset bundles or sound banks) |
 | `INSTALL_FAILED_NO_MATCHING_ABIS` | 32-bit-only APK; Frame has no AArch32 | None. PC/Rift version via Revive |
+| Crash at start: `NoClassDefFoundError: … Landroid/window/OnBackInvokedCallback;` or `NoSuchMethodError: No static method storeStoreFence()V in class Ljava/lang/invoke/VarHandle;` (GitHub #71/#72, triage `android-too-new`) | The APK needs Android 13+ (minSdk 33 or more; those were 34) and calls its classes at start; Lepton's Android is 11 (API 30). OVRPort lowers minSdk to 29, so it installs anyway. minSdk ≤ 32 (Quest's Android 12L) is fine: 16 working catalog games declare 32 | None (analysis `extra.min_sdk` > 32 → a warning on the game page/CLI and in the recipe notes; never unsupported from the manifest alone, the launch test's triage decides). Waits for Valve to update Lepton's Android |
+| Nothing opens; `TWALauncherActivity: Using URL from Manifest (https://…)`, `Creating TwaLauncher for com.oculus.browser`, `NameNotFoundException: com.oculus.browser` (GitHub #86 Mahjong Table VR, triage `web-wrapper`) | The APK is a Trusted Web Activity (Bubblewrap / Meta's PWA packaging): a website that opens in Meta's browser, which Lepton doesn't have | None: open the URL in a browser. Analysis `extra.web_wrapper` (manifest meta-data `android.support.customtabs.trusted.DEFAULT_URL`, resolved through resources.arsc, or androidbrowserhelper's LauncherActivity) → a warning with the URL (not unsupported: the manifest alone never decides) |
 | `UnsatisfiedLinkError` / `cannot locate symbol "ovr_…"` | overport's platform loader lacks Meta platform functions | `frame.ovrstubs` (automatic, generated stubs) |
 | missing `ovrMessageType_ToString` | same, but the game needs a real string | `frame.ovrplatformcompat` (automatic) |
 | The game stays in its built-in language or waits at start although its OBB / files hold language packs (`<tag>.lang`, e.g. `de.lang`) | overport's platform loader answers `ovr_LanguagePack_GetCurrent/SetCurrent` with request id 0, so the game never gets the pack's path | `frame.langpacks` (opt-in, experimental, shown for games whose data has `*.lang`; `native/langpack`, build it with `python native/build.py --only langpack`). Default pack: the one the game applies, else env `FRAMEPORT_LANGPACK=<tag>`, else the only pack; search path override `FRAMEPORT_LANGPACK_DIRS`. Unreal games (Deadpool VR) grey out a pack whose asset `Metadata` differs from the game's version string: the patch writes the APK's versionName as Metadata (env `FRAMEPORT_LANGPACK_META` overrides) and reports the pack under the `/storage/emulated/0/Android/obb/<pkg>/` spelling of its path; with `/sdcard/…` the text switched but the dialogue stayed silent (verified in the headset with Deadpool VR) |
 | `ClassNotFoundException com.oculus.os.AnalyticsEvent` → abort | Quest telemetry lookup in Meta XR Audio (Unreal build) or native code | `frame.metaxr_telemetry` + `frame.oculusos` (automatic) |
 | `JNI DETECTED ERROR`, `GetStringUTFChars … NULL` | CheckJNI is on because overport marks the app debuggable | `frame.nodebug` |
 | Unreal game quits a few seconds after start (`System.exit`) | ForceQuit after a failed Quest platform check | alternate build with `patch_remove_unreal_force_quit` (`use_alt`) |
+| Unreal game crashes a few seconds after the logo with no backtrace (Unreal's own signal handler hides it: logcat-crash.log empty, Zygote `exited due to signal 11`); the crashing thread is `GameThread`, pc in `libaaudio.so`, lr `libovrplatformloader.so (ovr_Microphone_GetOutputBufferMaxSize+0x10)`; the last platform call is `ovr_Microphone_Create` (e.g. The Walking Dead: Saints & Sinners Ch. 2) | OVRPort's platform loader opens the microphone's AAudio stream only in `ovr_Microphone_Start`, but `GetOutputBufferMaxSize` reads that stream unchecked; Unreal's Oculus voice asks for the size right after `Create` | `frame.ovr_microphone` (NULL check rewritten in place; size 0 until the microphone starts). OVRPort runtime 3.4.3-aa54c3f has the check itself: builds made with it leave the patch out (log "not needed: frame.ovr_microphone", `patches/upstream.py`) |
 | `xrCreateSwapchain` -26 / format unsupported (GLES) | Frame takes only sRGB formats, no MSAA | adapter `swapchain_fix` (default on) |
 | Frames rejected, "Waiting…" forever | a layer uses a failed swapchain or an extension that isn't enabled (e.g. equirect2) | adapter `layer_fix` (default on) |
 | `xrConvert…TimeKHR` FUNCTION_UNSUPPORTED spam; VrApi bridge stalls before recenter | runtime lacks timespec conversion | current adapter emulates it |
@@ -53,26 +77,47 @@ version is `catalog/triage.yaml` (used by `frameport test` / the Job screen); ke
 | PC VR game judders/stutters although the GPU keeps up; vrcompositor.txt "Timed out. N total" high or frames dropped | the game misses the headset's refresh (e.g. 96 Hz = 10.4 ms; Stormland's slow frames take 10.7 ms) | `pcvr.steamvr_tuning` (default on): next Play sets SteamVR per-app `preferredRefreshRate` + `motionSmoothingOverride` via `fp_vrsettings.exe` |
 | Quest app keeps recentering / snapping the view when you turn your head; log shows session state 5→4→3→4→5 within a second | the Frame briefly takes focus; the app recenters on focus changes | unfixed: hiding the dips (debounce) made AC Nexus stay black, so it was removed |
 | Video player / app finds no local videos; MediaProvider "Requested path /home/steamos/... doesn't appear under ..." | Lepton's /sdcard is a symlink to a host path, so Android's media index rejects every file | upload in the Files tab (Videos = /sdcard/Movies) and browse folders in the app |
+| Batman: Arkham Shadow closes during smoke-bomb effects; later input-tree corruption | Meta XR Audio Wwise deletes queued metadata still referenced by the current audio frame, then writes through the stale pointer | FrameBridge automatically retires metadata after current-frame references disappear, for the verified AArch64 SDK build only; see [AUDIO_METADATA.md](AUDIO_METADATA.md) |
+| Game stays on a loading or "Waiting" box although it reached FOCUSED; log `FrameBridge: xrEndFrame failed -25` then no more `pacing:` lines (e.g. PowerWash Simulator on some Frames, GitHub #39) | The eye image rect ends a few pixels past its swapchain (Unity rounds the swapchain width, the runtime's recommended size differs per Frame); SteamVR rejects every frame with XR_ERROR_SWAPCHAIN_RECT_INVALID | FrameBridge clamps every projection/quad image rect to its swapchain (`rect_clamp`, default on since 0.11.0; log `rect_clamp: view N image rect clamped`): rebuild + reinstall the game |
+| Unity game (OVRPlugin, GLES) crashes ~10 s in: `FrameBridge: xrCreateSwapchain … faces=6 … result=-2`, OVRPlugin `CreateSwapchain for eye 0: 0x0, 0 stages`, then render-thread SIGSEGV in memset ← libOVRPlugin ← `ovrp_EndFrame4` (libgallium/ANR follow; e.g. Budget Cuts Ultimate, GitHub #107); triage `cube-swapchain-refused` | The game shows a cube-map layer (OVROverlay cubemap); the Frame's runtime has no cube layers and refuses cube swapchains (XR_ERROR_RUNTIME_FAILURE); OVRPlugin doesn't check and writes into the image list it never got | FrameBridge `cube_standin` (default on): a refused cube swapchain is served as a GL cube map in the game's context and its layers are dropped (log `cube_standin: runtime refused …`): rebuild + reinstall. GLES only; a Vulkan game keeps the error |
 | Game (Unity, GLES) freezes, `zink: DEVICE LOST` | multisampled render-to-texture hangs the GPU | `frame.unity_no_msaa`; if it persists: unfixable → PC version |
+| Unreal GLES game crashes ~3 s after start: `Fatal signal 11 … fault addr 0x10000 in tid … (RHIThread)`, `#01 … libgallium_dri.so` (GitHub #83 Star Wars Pinball VR, triage `unreal-msrtt-crash`) | Unreal's mobile MSAA renders through multisampled render-to-texture; Zink's `find_rp_state` then indexes `rendering_state_cache[6]` one past its end (sample count ≥ 32) and calls a junk hash function (0x10000). Mesa bug (no bounds check) | `frame.unreal_gl_shim` (GL shim with `gl_hide_msrtt`, multiview kept for Unreal: Unreal 4.25 only enables multiview with GL_OVR_multiview, GL_OVR_multiview2 **and** GL_OVR_multiview_multisampled_render_to_texture, so the shim keeps the last one visible for Unreal and maps glFramebufferTextureMultisampleMultiviewOVR to the single-sampled glFramebufferTextureMultiviewOVR; log `multiview multisampled render-to-texture (N samples) drawn single-sampled`) |
+| Crash with `SIGILL (ILL_ILLOPN)` and `*pc=0xd50323bf` (autiasp), e.g. on Unreal's HttpManager thread (GitHub #83 Star Wars Pinball VR, triage `pac-unpaired`) | The engine's OpenSSL ARMv8 assembly has autiasp without a matching paciasp (libUE4.so: 38 paciasp, 40 autiasp; Poly1305 NEON). Quest CPUs treat PAC hints as NOPs, the Frame's CPU checks them | `frame.pac_hints`: in a library with unpaired counts every paciasp/autiasp becomes a NOP (in place) |
+| launch.log ends with `logcat: Unexpected EOF!` right after `Waiting for app …`; the game runs, but Steam's "Resume game" menu isn't closed and the launch test shows nothing (Vader Immortal on Lepton 3.0.5, Under Cover on 2.8.14; about 1 launch in 50) | Lepton's logcat mirror died | Agent v67 `_logcat_keeper` (started by launch.sh, added to older launchers by `upgrade_launchers`) reads the container's logcat itself (`podman exec lepton-steamlaunch-<appid> logcat -v threadtime -T 2000`) and appends it to launch.log; log `<base>/logcat-keeper.log` |
+| Unreal game (OVRPlugin) never starts VR: launch.log has `OVRPlugin: JNI_OnLoad` but never `CompositorOpenXR::PreInitialize`, no OpenXR session, then a crash a few seconds in (e.g. Star Wars Pinball VR, UE 4.25: null pointer in `FSceneRenderer::GetMultiViewSceneColor`, GitHub #83) | Unreal's Oculus module looks up every `ovrp_*` function of the OVRPlugin it was built against (`InitializeOculusPluginWrapper`, all ANDed); OVRPort's OpenXR OVRPlugin lacks a few old ones (UE 4.25 / OVRPlugin 1.44: `ovrp_GetPTWNear`), so the wrapper fails and OculusHMD is never pre-initialised | `frame.unreal_ovrp_entrypoints` (suggested when analysis `unreal_ovrp_lookups` name functions the shipped OVRPlugin lacks): generated `libfp_ovrpstubs.so` (DT_NEEDED of libOVRPlugin.so; dlsym on the plugin's handle searches its dependencies) with a stand-in per missing name returning ovrpFailure (-1000); build note lists the names |
 | Only the Android home screen shows; the log has Unity's VR device as `None` (e.g. Accounting+, Unity 2017) | Unity 2017–2018 built-in Oculus support starts VR only when `com.oculus.systemactivities` is installed; Lepton has no Meta system apps, so Unity falls back to non-VR | `frame.unity_oculus_check`: that package name in libunity.so → `android`, plus `native/ovrpshim` (libfp_ovrp.so): Unity 2017's legacy frame loop (`ovrp_Update2`/`ovrp_BeginFrame`) never calls `ovrp_WaitToBeginFrame`, so without the shim no `xrWaitFrame` happens, `CompositorOpenXR::Update … outside of frame bounds` floods the log and the dashboard freezes. With it: log `ovrp frame loop shim: waited for frame N`, ~71 fps. Accounting+ then stops at "press any button" although its OVRInput gets clean input (`INPUT_PROBE` in the patch logs connected controllers/buttons/input focus per call) — unresolved |
+| Black flat window, then a GPU hang: kernel `hangcheck detected gpu lockup` (offending task the game), `zink: DEVICE LOST`, Unity render-thread crash; `outside of frame bounds` thousands of times a second (e.g. BattleSisters, Unity 2019.4) | Unity 2019 on its built-in VR (no `libOculusXRPlugin.so`) uses the same legacy frame loop as Unity 2017: no `xrWaitFrame`, the render thread floods the GPU | `frame.unity_oculus_check` adds the ovrpshim frame wait for these too (revision 2) |
+| Unity built-in VR game (with `frame.unity_oculus_check`) freezes at a scene switch: the log stops after `Boot: Activating Scene: …`, the process stays alive, every thread sleeps (e.g. Sniper Elite VR, Unity 2019.4) | The shim's `xrWaitFrame` blocks until the previously waited frame is begun; Unity skipped beginning it at the scene switch and its render thread then waited for the main thread (gdb: UnityMain in vrclient `CSxrSession::StartNextFrame` ← `ovrp_WaitToBeginFrame` ← `fpov_Update2`). OVRPlugin also only begins the frame index it waited for | `frame.unity_oculus_check` revision 5: libunity.so's `ovrp_BeginFrame`/`ovrp_EndFrame` go through the shim, which waits ≤ 50 ms for the last waited frame to begin, else skips the wait (log `the last waited frame wasn't begun`), and gives a begin/end of another index the waited one |
+| Unity built-in VR game: the hands/weapons trail the controllers by centimetres when moving (headset fine, 72 fps), e.g. Sniper Elite VR | Unity's physics-step `ovrp_Update2` (prediction 0) makes OVRPlugin locate the nodes at the monotonic clock's "now", the XrTime base on a Quest but 0.05–0.9 s behind the Frame's XrTime; the runtime extrapolates backwards and the render-step reads after it get those poses too. A larger prediction is capped by OVRPlugin (~0.07 s) | `frame.unity_oculus_check` revision 5 holds the physics-step update back: both steps read the render update's display-time poses |
+| OVRPlugin game: the hands lag behind the controllers (also with `ovrp_hold_physics` on or off; rendering fine), e.g. BattleSisters | OVRPlugin passes its monotonic-clock "now" on as the OpenXR time (OVRPort's dispatcher converts XR_KHR_convert_timespec_time 1:1: the Frame's runtime lacks it, and FrameBridge's emulation is never asked), but the Frame's XrTime runs ahead of CLOCK_MONOTONIC (2.56 s on SteamOS 0.4.5): with `pose_debug=1` the hand spaces show `time - predicted display time -2564 ms`; BattleSisters also asks for its head at XrTime 0.1 s every frame | `adapter.pose_time_fix` (FrameBridge, suggested for Unity built-in OVRPlugin games): a located time nearer the monotonic clock than XrTime's "now" is moved by the clock offset measured at xrWaitFrame, one more than 0.5 s before the display time goes to "now" (log `pose_time_fix: …`; `pose_debug=1` counts both per 5 s). Once a build has this FrameBridge it is toggled in settings.conf (no rebuild) The offset is the largest of the last ~2 s of xrWaitFrame samples (hitches made single samples dip by up to 2.5 s and pushed fixed times into the future); far-past requests get the frame's display time. Headless survey of 54 games (2026-10-09): no head/view request on the monotonic clock in any other game; UE4 OVRPlugin 1.89 games (Robo Recall, Vader, Phantom, Time Stall) and The Room VR ask for head/views at XrTime ≈ 0 every frame, which works today; hands only show in the headset. Suggested for Unity built-in Oculus games only. A time equal (±1 ms) to one of the last 6 predicted display times is never moved, and monotonic times are only told apart when the clocks are more than 4 display periods apart and the time is clearly nearer the monotonic "now" (GitHub #49: on a Frame with XrTime only ~68 ms ahead, a display-time request after a hitch was moved +67.7 ms) |
+| Unreal game stuck on a loading image after the intro, frames keep coming (72 fps), no crash (e.g. Vader Immortal) | suspect: a Meta Platform SDK request no message ever answers | diagnostics: `frame.ovr_trace` (opt-in) logs every `ovr_*` call, the answers `ovr_PopMessage` returns and every 10 s the unanswered requests (`fp_ovrtrace` in launch.log). Never fake an entitlement answer |
 | Own-engine game crashes in `libVkLayer_fossilize.so` (Fossilize's recording thread, e.g. Roblox) | same as Deadpool VR: uninitialised pointers in what Fossilize records | `frame.vk_sanitize` now also covers own-engine libraries that load `libvulkan.so` by name |
 | Crash right after the game gets focus, in `vrclient.so … UpdateActionStateInternal` / `sxr_xrSyncActions` (e.g. Myst) | a race in the Frame runtime's input code on the first sync after focus (not every launch) | adapter `sync_guard` (input syncs one at a time with event polling, paused 250 ms after FOCUSED) |
 | View jumps sideways / game pauses or freezes for a moment every few seconds (e.g. Blade & Sorcery, BattleGlide) | the Frame drops focus for ~0.5 s (FOCUSED→VISIBLE→SYNCHRONIZED); games pause or re-align the player (`OnVRPresence … Teleport`) | adapter `focus_hold` |
 | SDL / LÖVE app crashes at start: `NullPointerException … ClipboardManager.addPrimaryClipChangedListener` in `SDLClipboardHandler.<init>` (e.g. Dramatic Shape) | Lepton's Android has no clipboard service (`service check clipboard`: not found) | `frame.sdl_clipboard` (that call → nops in classes.dex, in place, `apk/dex.py`); reproduced and verified with LÖVE for Android 11.5 |
+| Game crashes at start: `java.lang.NoSuchMethodError: No virtual method getAvailableCommunicationDevices()… in class Landroid/media/AudioManager` at `com.vivox.sdk.AudioChangeListener.checkAudioRouteAndApplyChanges` (e.g. Green Hell VR, GitHub #101); triage `vivox-api31` | Newer Vivox (voice chat) builds call Android 12 audio-routing methods without a version check; Lepton is Android 11. Older Vivox builds (Eleven Table Tennis, BattleSisters) don't have that code | `frame.vivox_audio_route` (suggested by analysis `vivox_api31`): every AudioChangeListener method that calls one of them returns at once (`Dex.return_early`: return-void / `const/4 v0, 0; return v0`, in place); voice chat keeps the default audio route |
 | Controllers do nothing (e.g. stuck on a setup screen); log: `xrSuggestInteractionProfileBindings … XR_ERROR_PATH_UNSUPPORTED` | the game only suggests bindings for Meta's newer profiles (Touch Plus / Touch Pro); the Frame's Android runtime knows `oculus/touch_controller`, not those | adapter `profile_remap` (default on): the bindings are suggested again for Touch (log: `controller profile … -> oculus/touch_controller`) |
+| Some buttons do nothing or the wrong thing (e.g. a Quest game's X/Y on the Frame's left controller) | the game binds only Quest Touch and SteamVR maps Touch onto the Frame controllers with its own remap (Touch left X/Y land on the d-pad, right X and Y repeat B), or the runtime rejected a profile or an input call | turn on adapter `input_diag` (diagnostics, off by default; `frameport settings <pkg> input_diag=1`) and look for `input_diag:` lines: `bindings: <profile> accepted` or `unsupported: interaction profile <profile> -> <result>` with the rejected paths, `bindings: /user/hand/<hand> uses <profile>`, `unsupported: function <name>`, `unsupported: xrCreateAction -> <result> (<action>)` |
 | Unity game hangs or the whole Frame restarts (e.g. in a menu); log: `The current MSAA level is 0, but the recommended MSAA level is 4. Switching to the recommended level.` (e.g. Lucky's Tale) | Meta's OVRManager (`useRecommendedMSAALevel`) turns 4x MSAA on at runtime, past QualitySettings; multisampled render-to-texture on GLES/Zink hangs the GPU | `frame.unity_runtime_msaa_off` (Cpp2IL: `OVRDisplay.get_recommendedMSAALevel` → 0) |
 | Unity game: one eye shows only effects or grey, the other is fine (e.g. I Am Cat, Oculus XR Plugin on GLES) | the game's single-pass multiview rendering goes wrong for array slice 1 (the adapter submits both slices correctly) | `frame.unity_multipass` (Cpp2IL: `OculusSettings.GetStereoRenderingMode` → MultiPass); `swap_eyes=1` tells whether the game or the adapter is at fault |
 | Setup/intro loops every launch (Espire 2) | save folders created without write permission | launcher repairs permissions every 2 s (built in) |
 | VrApi bridge: never enters VR | Frame reaches FOCUSED later than Quest; tracking only when worn | bridge waits 30 s; test in the headset |
+| Unreal game (ILMxLAB, e.g. Vader Immortal) plays its intro, then stays on its loading card (portrait + progress bar) at 72 fps and ignores input (GitHub #49) | the menu waits for `UVRUtils::GetQuestShaderPrecompilePercent()` to reach 100 %; the precompile only starts when `IsRunningOnSantaCruz()` (a Quest), the other branch returns 0.0 | `frame.unreal_quest_precompile` (non-Quest branch returns 1.0; found by Klownicle); suggested when the engine exports that function (analysis `unreal_quest_gates`) |
 
 ## Picture problems (headset on)
 | Symptom | Cause | Fix |
 |---|---|---|
+| Unreal game (ILMxLAB, e.g. Vader Immortal): controllers track but grip/trigger do nothing, grabbing never works (Unreal's own input values move, the game's stay 0) | `URPOCKeyMapManagerComponent` picks the Quest or the Gear VR key set by `IsRunningOnSantaCruz()`; on the Frame it takes Gear VR, empty in a Quest build | `frame.unreal_quest_keymap` (the Oculus case keeps the Quest set, for action and axis mappings; found by Klownicle, GitHub #49) |
+| The hands' thumbs never move when you touch the thumbstick or buttons (Unreal `ThumbUp` stays 1, e.g. Vader Immortal) | OVRPlugin reports thumb proximity from XR_FB_touch_controller_proximity, which the Frame's runtime lacks; OVRPort's loader offers it anyway and the proximity actions never get a binding | adapter `proximity_emul=1` (thumb proximity from the touch inputs: thumbstick, face buttons, thumb rest; 2 = also the index finger from trigger touch); log `proximity_emul: finger proximity bound to touch`. **For UE4 Oculus games this didn't animate the thumbs** (Vader, GitHub #49): use `frame.unreal_thumb_touch` (found by Klownicle): `OculusInput::FOculusInput::SendControllerEvents` computes ThumbUp from NearTouches (masks 0x2/0x8); the patch makes it read Touches (the slot 4 bytes before) with masks 0x0f00 (X/Y/stick/thumb rest) / 0x000f (A/B/stick/thumb rest), keeping the inversion; three instructions, matched exactly (build note `OculusInput ThumbUp: from the capacitive touches`). Matches Vader Immortal Ep. I, Robo Recall, Phantom: Covert Ops, Time Stall, Star Wars: Tales from the Galaxy's Edge; newer UE4 builds (e.g. Asgard's Wrath 2, RE4, In Death) compile it differently (shared mask registers) and aren't matched |
+| OpenGL ES game: the GPU hangs at one effect (freeze/exit, compositor watchdog, e.g. Vader Immortal's lightspeed jump) | a shader (as Zink compiles it) reads loop counters/accumulators before setting them | capture the SPIR-V (adapter `zink_shader_dump=1` writes every module to `files/fp_spirv/`, or a GPU capture), then a `zink_shader_fix` entry (same format as `vk_shader_fix`) + `frame.zink_shader_fix` (Vulkan layer under Zink, activated through GraphicsEnv's debug layer list); log `shader fix layer: fixed shader module N`; triage `zink-shader-fix-mismatch` when a Frame update changed the driver's output |
 | 2D Android app: Steam says it's running but nothing shows | Lepton runs apps headless unless the app folder has `lepton-show-flatscreen` | FramePort adds it for apps without VR (agent v28+); reinstall apps installed before |
+| A phone/tablet app shows nothing in the headset, or a VR app opens as a flat window | FramePort's VR/2D guess (`vr_kind`) is wrong for this app | patch `device.display_mode` → **Flat window** or **VR** (Customize → "Show as VR or as a flat window"), then Update on Frame |
+| "Install with FrameDrop" button opens FrameDrop (or nothing) instead of FramePort | another program owns `framedrop://`, or the switch is off, or macOS (Flet can't receive links there) | Settings → Install links → **Use FramePort for these links**; else Add games → Install from a link… (paste the button's address) |
 | 2D Android app: back/home/recents buttons cover the app's own buttons | Android's navigation bar | patch `device.hide_navbar` (on by default for apps without VR) sets `qemu.hw.mainkeys=1`; reinstall to apply |
 | Black screen, audio works, GLES engine with direct VrApi | Mesa rejects Quest-style GLSL | `frame.gl_shim` (logs `GLShim: SHADER COMPILE FAILED` + source lines) |
 | Black screen, audio works, log `Unsupported VrApi layer type N` | bridge drops frames containing that layer | extend the bridge (cylinder=3 is converted to a quad already) |
 | Only some draws visible (e.g. controllers) + `glGetError 0x502` | multiview shaders used on single-view FBOs | GL shim `gl_hide_multiview=1` (default) |
+| Own GLES engine (OpenXR, not VrApi): eye view fine, but HUD / menu / PDA panels black (e.g. Doom3Quest, GitHub #77; no error in the log) | every shader declares `layout(num_views=2) in;`, also the ones drawn into the engine's single-layer offscreen framebuffers (2D textures/renderbuffers); OVR_multiview makes such draws INVALID_OPERATION and Mesa drops them (`draw_validate.c`), Quest's driver doesn't | `frame.gl_multiview_fbo` (opt-in, experimental: `libfpglmv.so` interposes GLES and draws those cases with a single-view twin of the program; logs `GLMV: twin built: program N -> M`, per-5-s `single-view draws` counters; `gl_mv_debug=1` adds glGetError checks; triage `gl-multiview-twin-failed`). Alternative: the game's own fix (two-layer multiview pool, Xandrix's patch in #77) |
 | Upside-down image in a GL bridge game | GL images start at the bottom row | fixed in the bridge (swap angleUp/Down for GL chains) |
 | UI panels upside down (AC Nexus) | XrCompositionLayerImageLayoutFB VERTICAL_FLIP unsupported | adapter `flip_emul=1` (default); rotating quads makes them vanish |
 | Passthrough black (BAM) | XR_FB_passthrough missing | adapter `passthrough_emul=1` (default) + `patch_force_passthrough` for MR-only games |
@@ -83,15 +128,29 @@ version is `catalog/triage.yaml` (used by `frameport test` / the Job screen); ke
 | Eye distortion while moving (Arcsmith, Time Stall) | unknown (not eye swap, tracking, Valve layers, depth or pacing) | unresolved |
 | One eye grey / only effects (I Am Cat, Unity Oculus XR Plugin on GLES) | the game's multiview pass draws array slice 1 wrong on Zink | `frame.unity_multipass` (also rewrites the getter's inlined read in `OculusLoader.Initialize`; check for two `array=1` eye swapchains) |
 | View vibrates even when holding still after `frame.unity_multipass` (I Am Cat) | poses/times are consistent, but two passes on Zink make every frame one period late, and the game clamps its physics step to 10 ms | not fixed (scale 0.8 didn't help); next ideas: fix multiview instead, or the game's fixed timestep |
-| Game freezes / pauses for 1-2 s now and then, no flicker; only some games (Blade & Sorcery) | the headset's wear sensor flickers off while worn (SteamVR vrserver.txt `HMD off, stopping eye tracking` … `HMD on`), the Frame turns it into a focus loss and Quest games that pause on focus loss pause | adapter `focus_hold=1` + `focus_hold_ms=2500` per game; native games don't react, so it's per game |
+| Game freezes / pauses for 0.5-2 s now and then, no flicker (e.g. Blade & Sorcery, Lucky's Tale) | the headset's wear sensor flickers off while worn (`logs/eyetracking.txt` `HMD off, stopping eye tracking` … `HMD on`), the Frame turns it into a focus loss and Quest games that pause on focus loss pause | adapter `focus_hold` (on by default since 2026-10-05, dips up to `focus_hold_ms` = 5000 ms are hidden; longer ones still pause) |
 | Minor glitches on some objects (Myst, Unreal Vulkan) | unknown; not application space warp (turning it off changed nothing and ran worse) | unresolved |
-| Graphics crash in vkCreateInstance with pc == fault address, from the game's own Vulkan hooks (BONELAB `libSLZQuestNative`) | a pointer into memory freed with OVRPlugin's pre-init OpenXR instance; not the runtime (vrclient.so) or Fossilize being unloaded (keeping both loaded with RTLD_NODELETE didn't help) | unresolved |
+| Unity game crashes or hangs right as Vulkan starts, after `SLZ Graphics plugin loading!` and OVRPlugin's pre-init `xrDestroyInstance`: SIGSEGV with pc 0 (or pc == fault address in an unloaded library), x16/x23 in `libSLZQuestNative.so` (BONELAB 1.2974) | Stress Level Zero's graphics plugin hooks Unity's Vulkan start-up (IUnityGraphicsVulkanV2 interception: vkCreateInstance/vkCreateDevice) and vkCreateSampler; its vkCreateInstance wrapper calls an invalid pointer on the Frame | `frame.slz_vulkan_hooks` (its two registrations become no-ops; Unity starts Vulkan itself; ~35 s of shader prewarming without its pipeline cache) |
+| Unity game shows a picture but the player body is frozen: no head tracking, the controllers stay on the model, no buttons, although OpenXR input works (BONELAB 1.2068, Oculus XR Plugin) | OVRPlugin reports the headset as not worn (`ovrp_GetUserPresent2` → 0) a few seconds after start, and the game's rig only follows a present user (Marrow `XRHMD.IsUserPresent` = Unity's HMD `UserPresence`) | `frame.unity_user_presence` (the Oculus XR Plugin's lookup → `libfp_ovrp.so`, reports present; log `user presence: OVRPlugin 0 …`) |
+| Unreal 5 game crashes at its first render pass, backtrace `vulkan.freedreno.so` ← `libVkLayer_fossilize.so` ← `libfp_vk.so (create_render_pass2)` (Metro Awakening) | a subpass without a depth attachment names a depth/stencil resolve attachment; the Frame's Turnip reads the missing depth attachment (NULL) | the Vulkan shim drops that resolve (always, FramePort after 0.11.0; log `dropped the depth resolve of subpass N (no depth attachment)`); triage `unreal-vulkan-driver-crash` |
+| Unreal 5 game crashes in `vulkan.freedreno.so` called straight from `libUnreal.so` right after its swapchains, or a few seconds into the first frames (Metro Awakening) | Unreal turns on fragment-density-map foveation because Turnip offers VK_EXT_fragment_density_map, then records barriers (to `FRAGMENT_DENSITY_MAP_OPTIMAL`) and image views (2D array R8G8) for a density map the Frame never provides (VK_NULL_HANDLE); Turnip dereferences it | adapter `vk_hide_fdm=1` (the game doesn't see the extension) + `vk_spec_fixes=1` (leaves out null-image barriers, refuses null-image views); triage `unreal-fdm-missing`. Found by disassembling the driver at the crash pc: the struct offsets (0x58 = VkSubpassDescription2, 0x48/0x60 = image barriers, viewType/format in registers) name the call |
 | Own-engine game crashes in `je_free` from its own library on the first frames (Roblox) | the game frees memory it doesn't own; not the Vulkan shim or the format fallback | unsupported |
 
+## Live view (Live view tab, `install/livestream.py`)
+| Symptom | Cause | Fix |
+|---|---|---|
+| Status line says "software encoder" (30 fps, the Frame's CPU busier) | `fp_venc --probe` failed (missing upload, encoder busy or refused a format: exit 4) or the helper couldn't be put on the Frame | on the Frame: `~/.local/share/frameport/bin/fp_venc --probe; echo $?` and `--selftest`; the app log names upload failures. `FP_VENC_DISABLE=1` forces the fallback for tests |
+| Picture drifts out of sync with the sound | the hardware path relies on one H.264 frame per fps slot (ffmpeg `-framerate`); `fp_venc: stats … skipped=` > 0 on stderr means slots were skipped | see the stats line (every 10 s); a stopped/suspended Frame skips slots on purpose |
+| Viewer joins only after several seconds | the keyframe request (`k` on the channel) didn't reach the encoder; the viewer then waits for the next regular keyframe (4 s) | check `live: encoder=hardware` came first (requests are sent only then) |
+
 ## Debugging techniques that worked
 - A user's problem report: `frameport diag inspect <FramePort-diag-*.zip>` re-triages its launch log with the current
   signatures; the zip has the recipe, analysis, ELF/PE imports, Frame logs and versions (docs/DIAGNOSTICS.md).
 - Read `<base>/launch.log` (logcat mirror). Filter the game's pid: `Start proc <pid>:<package>`.
+- **Monitor tab** (GUI, while a game runs): fps from FrameBridge's pacing lines next to GPU busy %, the hottest
+  sensor, memory pressure and per-process CPU/GPU/memory. A memory runaway (Lucky's Tale, Vader Immortal) shows as
+  rising memory + "waiting" before the OOM kill; a GPU-bound game as GPU near 100 % with fps under target; heat as the
+  temperature tile turning amber/red. Sources and costs: FRAME_RUNTIME.md "Monitoring sources".
 - The adapter logs as `FrameBridge` (settings, xrCreateInstance result, swapchain retries, pacing fps).
 - For GLES/GLAD engines, wrap `eglGetProcAddress` to see shader compile errors (build the shim with `-DGLSHIM_TRACE`
   for per-FBO draw counts and draw-call errors; the bridge has `-DOVP_GL_DIAG` for eye-image readback).
@@ -107,6 +166,14 @@ version is `catalog/triage.yaml` (used by `frameport test` / the Job screen); ke
   touching new memory (`perf script -F comm,tid,ip,dso`); `-t <tid> -F 499` samples one thread. Map IL2CPP
   addresses with a full Cpp2IL diffable-cs dump (method `Offset` = address − the r-xp mapping of libil2cpp.so).
   Sample memory per mapping name from `/proc/<pid>/smaps` (`[anon:libc_malloc]` = native heap).
+- Hangs (every thread asleep): backtraces of all threads with gdb. Root inside the Lepton container may ptrace the
+  game (the host's `ptrace_scope` 1 doesn't apply there) and the guest has `gdbserver64`; `debuggerd -b` fails (no
+  tombstoned). Copy every mapped library to a local sysroot (`podman exec <container> cat /proc/<pid>/maps`, then
+  `tar -chf - -T <list>` through `podman exec -i`; the app's own libs from the installed `lepton-app/game.apk` at their
+  `/data/app/…/lib/arm64` path), then on the PC: `gdb -batch -ex "set sysroot <dir>" -ex "target remote | ssh
+  steamos@<frame> podman exec -i lepton-steamlaunch-<appid> gdbserver64 - --attach <pid in the container>" -ex
+  "thread apply all bt 25" -ex detach` (`set sysroot target:` makes gdbserver assert in linux_mntns_readlink).
+  `/proc/<pid>/task/*/syscall` (read inside the container) shows each thread's syscall and pc without a debugger.
 - Unity catches native crashes itself: no debuggerd backtrace in Lepton's logcat-crash.log, but a
   `tombstone_00` in the game's `Android/data/<pkg>/files/` with the memory map (map pc/lr/registers to libraries).
 - Focus losses: the game sees FOCUSED→VISIBLE→SYNCHRONIZED (OVRPlugin `[XR_SESSION]`, FrameBridge `focus_hold:`

native/README.md

@@ -1,5 +1,9 @@
 # Native components
 
+FrameBridge includes automatic metadata retirement for the verified Meta XR Audio
+Wwise build; see [AUDIO_METADATA.md](../docs/AUDIO_METADATA.md) for its lifetime
+invariant and regression coverage. It uses the existing adapter installation.
+
 Sources of the prebuilt binaries in `../artifacts/` (committed, with `SHA256SUMS`). End users never compile anything;
 developers rebuild with `python native/build.py` (downloads NDK r27c, OpenXR headers at pinned commits, d8 into
 `native/.cache/`, git-ignored). The adapter, GL shim and platform compat rebuild byte-identically; the VrApi bridge
@@ -7,14 +11,17 @@ embeds debug paths (`-g`) and the dex depends on the d8 version, so those differ
 
 | Dir | Artifact | What / why |
 |---|---|---|
-| `adapter/` | `{arm64-v8a,armeabi-v7a}/libopenxr_loader_generic.so` | **FrameBridge**: replaces overport's generic loader (which is renamed `libopenxr_loader_original.so`) and fixes Steam Frame runtime gaps. Hooks xrCreateInstance, swapchains, xrEndFrame, spaces, xrPollEvent, … everything else is forwarded by `gen_forwarders.py`-generated tail calls. `scene_emu.c` = Meta scene/spatial-entity emulation; `flip_vk.c` = Vulkan blit for VERTICAL_FLIP quads. `session_fixes.c` = per-game session fixes, all off by default and hooked only when on (`layer_debug` diagnostics, `stable_local`, `focus_hold`, aim correction `aim_pitch/aim_yaw/aim_forward`, `refresh_rate`); `layer_emul_gl.c` = `equirect_emul` (GLES sessions only): 360° equirect/equirect2 layers become one adapter projection layer, drawn by a worker thread with its own EGL context shared with the app's: each 360° image is converted to a cube map only when it changes, and the view is redrawn only after a 4° head turn (GL/EGL resolved with dlopen, so Vulkan games never load them); `layer_math.h` = their pose/face math, tested on the host by `tests/test_layer_emul.py`. `render_model.c` = XR_FB_render_model emulation (setting `controller_models`, off by default): serves `files/framebridge/controller_{left,right}.glb`, which the agent converts on the Frame from SteamVR's own Frame controller render models (never shipped by FramePort); tested on the host by `tests/test_render_model.py`. Settings: `libframe_settings.so` in the APK + `settings.conf`/`framebridge.conf` on the Frame. |
-| `vrapi-bridge/` | `arm64-v8a/libvrapi.so` | VrApi → OpenXR bridge from [Android-XR-Bridge/OVRPort](https://github.com/Android-XR-Bridge/OVRPort) `native/vrapi` at 5e7df52 (GPL-3.0, `LICENSE.upstream`; unchanged upstream as of OVRPort v1.2.5, which ships the unpatched code as its opt-in `patch_vrapi_openxr` in experimental CLI builds), with our changes in `upstream-patches/`: GLES sessions + GL texture swapchains, cylinder→quad layers, GL vertical flip, UNORM↔sRGB format twins, 30 s VR-mode deadline, VALID-only recenter, loading-icon layers skipped, diagnostics behind `-DOVP_GL_DIAG`. |
+| `adapter/` | `{arm64-v8a,armeabi-v7a}/libopenxr_loader_generic.so` | **FrameBridge**: replaces overport's generic loader (which is renamed `libopenxr_loader_original.so`) and fixes Steam Frame runtime gaps. Hooks xrCreateInstance, swapchains, xrEndFrame, spaces, xrPollEvent, … everything else is forwarded by `gen_forwarders.py`-generated tail calls. `scene_emu.c` = Meta scene/spatial-entity emulation; `flip_vk.c` = Vulkan blit for VERTICAL_FLIP quads. `session_fixes.c` = per-game session fixes, all off by default and hooked only when on (`layer_debug` diagnostics, `stable_local`, `focus_hold`, aim correction `aim_pitch/aim_yaw/aim_forward`, `refresh_rate`, `proximity_emul` = finger proximity (XR_FB_touch_controller_proximity, which the Frame lacks) from the capacitive touch inputs: OVRPlugin's `hand_thumb_proximity`/`hand_trigger_proximity` actions get extra Touch bindings); `input_diag.c` = controller-input diagnostics (setting `input_diag`, off by default and hooked only when on; logs suggested interaction profiles and the runtime's answers, each hand's current profile, functions the runtime lacks and failing input/haptics/perf calls, each line once; tested on the host by `tests/test_input_diag.py`); `layer_emul_gl.c` = `equirect_emul` (GLES sessions only): 360° equirect/equirect2 layers become one adapter projection layer, drawn by a worker thread with its own EGL context shared with the app's: each 360° image is converted to a cube map only when it changes, and the view is redrawn only after a 4° head turn (GL/EGL resolved with dlopen, so Vulkan games never load them); `layer_math.h` = their pose/face math, tested on the host by `tests/test_layer_emul.py`. `render_model.c` = XR_FB_render_model emulation (setting `controller_models`, off by default): serves `files/framebridge/controller_{left,right}.glb`, which the agent converts on the Frame from SteamVR's own Frame controller render models (never shipped by FramePort); tested on the host by `tests/test_render_model.py`. Settings: `libframe_settings.so` in the APK + `settings.conf`/`framebridge.conf` on the Frame. |
+| `vrapi-bridge/` | `arm64-v8a/libvrapi.so` | VrApi → OpenXR bridge from [Android-XR-Bridge/OVRPort](https://github.com/Android-XR-Bridge/OVRPort) `native/vrapi` at 5e7df52 (GPL-3.0, `LICENSE.upstream`; unchanged upstream as of OVRPort v1.2.5, which ships the unpatched code as its opt-in `patch_vrapi_openxr` in experimental CLI builds), with our changes in `upstream-patches/`: GLES sessions + GL texture swapchains, cylinder→quad layers, GL vertical flip, UNORM↔sRGB format twins, 30 s VR-mode deadline, VALID-only recenter, loading-icon layers skipped, `vrapi_PollEvent`/`RecenterPose`/`SetDisplayRefreshRate`/`GetSystemPropertyFloatArray` (BlazeRush imports them, GitHub #57), diagnostics behind `-DOVP_GL_DIAG`. `upstream-patches/` reproduces these sources from the fork's `native/vrapi` (checked 2026-10-06 against its latest commit); upstream PRs Android-XR-Bridge/OVRPort#3-#8, tracked in GitHub #75. |
 | `platformcompat/` | `arm64-v8a/libovrplatformcompat.so` | Real `ovrMessageType_ToString` (same fork, `native/platform`). |
-| `langpack/` | `arm64-v8a/libfp_langpack.so` | Language packs for the Meta Platform SDK (patch `frame.langpacks`, opt-in). overport's platform loader is a dispatcher in front of Meta's own loader and answers `ovr_LanguagePack_GetCurrent/SetCurrent` with `return 0` (no reply ever). This library becomes the loader's first DT_NEEDED; the loader's own exports of the 31 functions it defines are made STB_LOCAL in `.dynsym` (`elf.hide_exports`, nothing moves), so symbol lookups reach the library first. It serves `<tag>.lang` files found in the game's OBB / app files (`$FRAMEPORT_LANGPACK_DIRS` overrides the search path) through `ovr_LanguagePack_*`, `ovr_AssetFile_GetList` (the loader's list + the packs) and `ovr_AssetFile_StatusById`; its own message queue is merged into `ovr_PopMessage`, and every handle that is not ours (an address-range check) goes to the loader's original function, whose address is read at run time from the loader's in-memory `.dynsym`. Host-tested against a stand-in loader (`tests/test_langpack.py`, plain `cc`, no NDK); the bionic/headset side is unverified. |
+| `langpack/` | `arm64-v8a/libfp_langpack.so` | Language packs for the Meta Platform SDK (patch `frame.langpacks`, opt-in). overport's platform loader is a dispatcher in front of Meta's own loader and answers `ovr_LanguagePack_GetCurrent/SetCurrent` with `return 0` (no reply ever). This library becomes the loader's first DT_NEEDED; the loader's own exports of the 31 functions it defines are made STB_LOCAL in `.dynsym` (`elf.hide_exports`, nothing moves), so symbol lookups reach the library first. It serves `<tag>.lang` files found in the game's OBB / app files (`$FRAMEPORT_LANGPACK_DIRS` overrides the search path) through `ovr_LanguagePack_*`, `ovr_AssetFile_GetList` (the loader's list + the packs) and `ovr_AssetFile_StatusById`; its own message queue is merged into `ovr_PopMessage`, and every handle that is not ours (an address-range check) goes to the loader's original function, whose address is read at run time from the loader's in-memory `.dynsym`. With patch `frame.asset_files` (marker byte `@FPASSETS@`, or env `FRAMEPORT_ASSET_FILES=1`) it also lists the data's `*.pak` content files as installed `default` asset files and answers `ovr_AssetFile_DownloadById` for them at once (a completed `DownloadUpdate`, then the result with the path). Host-tested against a stand-in loader (`tests/test_langpack.py`, plain `cc`, no NDK); the bionic/headset side is unverified. |
 | `glshim/` | `arm64-v8a/libglshim.so` | Mesa GLSL compatibility for GLAD engines (hooks eglGetProcAddress): comments out `#pragma` before `#extension`, enables `GL_EXT_shader_implicit_conversions`, hides GL_OVR_multiview (`gl_hide_multiview`, default 1) and logs failed shaders. `-DGLSHIM_TRACE` adds per-FBO draw/error tracing. |
+| `glmv/` | `arm64-v8a/libfpglmv.so` | Single-view draws of OVR_multiview programs (patch `frame.gl_multiview_fbo`, opt-in, GitHub #77). Mesa enforces OVR_multiview's rule that a draw's program declares as many views as the draw framebuffer has; engines that compile every shader with `num_views=2` and also draw into ordinary 2D framebuffers (Doom3Quest's HUD/PDA pool) lose those draws. The engine library gets it as first DT_NEEDED (direct `gl*` imports) and its `dlopen("libGLESv3.so")` string is rewritten to `libfpglmv.so` (same length; its `qgl*` dlsym table); linked `--no-as-needed` to libGLESv3 so dlsym on its handle finds everything it doesn't wrap. It records stage sources at glLinkProgram, caches the draw framebuffer's color-attachment view count per bind, and when a multiview program draws into a 0-view framebuffer it binds a lazily built twin (`glmv_rewrite.h`: num_views layout blanked, `gl_ViewID_OVR` -> `(0u)`; attribute locations + uniform block bindings copied, default-block uniforms copied before every such draw with a shadow to skip unchanged ones), draws, rebinds the original. Logcat tag `GLMV`; `gl_mv_debug=1`. The rewriter is host-tested on Doom3Quest's 19 shaders (`tests/test_gl_multiview_fbo.py`); untested on the device. |
+| `zinkfix/` | `arm64-v8a/libVkLayer_fp_shaderfix.so` | Shader-fix Vulkan layer `VK_LAYER_FP_shader_fix` for OpenGL ES games (patch `frame.zink_shader_fix`): sits between Zink (Mesa's GL on Vulkan) and the driver and inserts the words of `zink_shader_fix` (same format as the Vulkan shim's `vk_shader_fix`: size + SHA-256 match) into SPIR-V modules; `zink_shader_dump=1` writes every distinct module to `files/fp_spirv/`. The engine library loads it first (DT_NEEDED); its constructor puts the layer in front of Android's GraphicsEnv debug layer list (private Android 11 `getDebugLayers`/`setDebugLayers`, found through libvulkan.so's dependencies) before EGL starts, so the loader picks it up from the app's lib dir. Exports only the enumeration functions and `VK_LAYER_FP_shader_fixGet*ProcAddr` (never plain `vk*` entry points). Vader Immortal's lightspeed shaders (Klownicle, GitHub #49). |
 | `xrlayer/` | `linux-arm64/libxr_frameport_timefix.so` + `XR_APILAYER_FRAMEPORT_timefix.json` | OpenXR API layer for Windows PC VR games under Proton on the Frame (glibc aarch64, built freestanding with the NDK's clang), on by default (patch `pcvr.xr_timefix`). Retries `xrCreateInstance` as an OpenXR 1.0 app when the runtime rejects 1.1 (the Frame's SteamVR runtime does, and Proton 11's VR helper asks for 1.1). Also emulates `xrConvertTimespecTimeToTimeKHR`/`xrConvertTimeToTimespecTimeKHR` if the runtime refuses them (the Frame's Android runtime does; its Linux runtime, used by Proton, supports them as of 2026-09-29 — so this part is only a fallback; Proton's wineopenxr needs them for `XR_KHR_win32_convert_performance_counter_time`, which Revive requires) with the adapter's xrWaitFrame-calibrated offset, and drops the extension from xrCreateInstance if the runtime rejects it. Enabled per game by the Proton launch.sh (`XR_API_LAYER_PATH`, `XR_ENABLE_API_LAYERS`). `tests/test_xrlayer.py` builds it for x86_64 and drives it via ctypes. |
 | `oculushmd/` | `win-x64/fp_oculushmd.exe` | PC VR counterpart of overport's `patch_oculus_unreal` (patch `pcvr.oculus_unreal`, default for Unreal Rift games on the Frame). Unreal's OculusHMD and LibOVR's `ovr_Detect` only start when the Windows named event `OculusHMDConnected` exists and is signalled (the Oculus service creates it). `fp_oculushmd.exe <command line>` creates it (manual reset, signalled), runs the command (Revive's injector) in a job object and keeps the event until every process in the job — the game and its children — has exited (fallback without job support: 3 minutes); returns the command's exit code and logs `FramePort oculushmd: …` to stderr (launch.log). Freestanding Windows x64 console exe (no CRT, no Windows SDK): the NDK's clang + `lld-link /Brepro` with a kernel32 import library generated by `llvm-dlltool`, so it's byte-reproducible. Tested on Windows from WSL with a build whose event name is `-DEVENT_NAME=L"…"` (the Oculus service owns the real event on a PC with the Oculus app). |
 | `xrshim/` | `arm64-v8a/libframe_xrshim.so` | FrameBridge extension shim, only in builds with `controller_models=1`. overport's dispatcher (`libopenxr_loader.so`) answers `xrGetInstanceProcAddr` from a fixed table and refuses everything else (`overportOXR: Unknown proc addr: xrLoadRenderModelFB`), so the adapter never sees XR_FB_render_model lookups. Meta's OVRPlugin gets the function with `dlopen("libopenxr_loader.so")` + `dlsym`, so FramePort rewrites that `.rodata` string in `libOVRPlugin.so` (same length, in place) to `libframe_xrshim.so`. The shim returns the adapter's emulated functions (`framebridge_extension_proc`) and forwards every other name to overport. A DT_NEEDED interposer does not work here (dlsym on a handle searches that library first); tried and dropped. |
+| `venc/` | `linux-arm64-bin/fp_venc` | Hardware H.264 encoder for the live view, run on the Frame (spec: `venc/SPEC.md`). Reads SteamVR's "headset view" webcam (v4l2loopback `/dev/video99`, RGB24), box-scales and converts it to NV12 (BT.709 limited range; `convert.c`, NEON with a bit-identical scalar reference, also built for x86_64 by the host test), and feeds the SoC's V4L2 stateful encoder (`dev-encoder.rst`, Qualcomm iris `/dev/video-enc0`): CBR, no B-frames, SPS/PPS on every IDR, one frame per slot of a fixed grid (fps = a divisor of the panel refresh read through DRM KMS, default cap 45), Annex B on stdout. stdin `k` = keyframe, `q`/EOF = drain and stop; `--probe` prints the setup as JSON, `--selftest` compares NEON and scalar output. Fully static and freestanding (raw syscalls, own `_start`; only the NDK's kernel UAPI headers, staged in `.cache/uapi-arm64`), byte-reproducible. Lives in `linux-arm64-bin/` because `linux-arm64/` is uploaded whole as the OpenXR layer. |
 | `java-stubs/` | `dex/oculusos-stubs.dex` | No-op `com.oculus.os.AnalyticsEvent` / `UnifiedTelemetryLogger` for native code that looks them up. |
 
 The ovr_* stub library is *not* prebuilt: `src/frameport/analysis/stubgen.py` generates it per game from the exact

native/adapter/audio_metadata.h

@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// Meta XR Audio Wwise metadata retirement. Enabled automatically for the
+// exact verified AArch64 SDK build; unrelated libraries remain untouched.
+#pragma once
+#if defined(__aarch64__)
+#include <pthread.h>
+#include <sched.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <time.h>
+#include <link.h>
+#include <string.h>
+static size_t mx_audio_page;
+static void *mx_audio_detour(unsigned char *address,void *replacement,const uint32_t expected[4]) {
+    if(memcmp(address,expected,16)) return NULL;
+    unsigned char *trampoline=mmap(NULL,mx_audio_page,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANONYMOUS,-1,0);
+    if(trampoline==MAP_FAILED) return NULL;
+    uint32_t branch[2]={0x58000050u,0xd61f0200u}; // ldr x16, +8; br x16
+    memcpy(trampoline,address,16);
+    memcpy(trampoline+16,branch,8);
+    uintptr_t continuation=(uintptr_t)address+16;
+    memcpy(trampoline+24,&continuation,8);
+    __builtin___clear_cache((char*)trampoline,(char*)trampoline+32);
+    if(mprotect(trampoline,mx_audio_page,PROT_READ|PROT_EXEC)) return NULL;
+    unsigned char *page=(unsigned char*)((uintptr_t)address&~(mx_audio_page-1));
+    if(mprotect(page,mx_audio_page,PROT_READ|PROT_WRITE|PROT_EXEC)) return NULL;
+    memcpy(address,branch,8);
+    memcpy(address+8,&replacement,8);
+    __builtin___clear_cache((char*)address,(char*)address+16);
+    mprotect(page,mx_audio_page,PROT_READ|PROT_EXEC);
+    return trampoline;
+}
+#include "audio_metadata_queue.h"
+typedef struct {float previous,current;} MxAudioRamp;
+static uintptr_t mx_audio_base;
+// set once the library was found but isn't the verified build: stop looking (xrPollEvent runs several times a frame)
+static int mx_audio_checked;
+static uint64_t (*mx_audio_consume_original)(void*,void*,void*,const void*,MxAudioRamp);
+static void mx_audio_kill(unsigned experimental) {
+    void *mutex=(void*)(mx_audio_base+(experimental?0x5fe2e0:0x5fe380));
+    int (*trylock)(void*)=(void*)(mx_audio_base+0x5b369c);
+    void (*unlock)(void*)=(void*)(mx_audio_base+0x5b36bc);
+    if(!trylock(mutex))return;
+    mx_audio_drain((void**)(mx_audio_base+(experimental?0x5fe2d8:0x5fe378)),experimental?40:24);
+    unlock(mutex);
+}
+static void mx_audio_kill_experimental(void) {mx_audio_kill(1);}
+static void mx_audio_kill_regular(void) {mx_audio_kill(0);}
+static uint64_t mx_audio_consume(void *sink,void *main_mix,void *passthrough,const void *objects,MxAudioRamp ramp) {
+    const unsigned char *previous=mx_audio_objects;mx_audio_objects=objects;
+    // An audio thread can enter just after its prologue was patched, before
+    // the installing thread publishes the completed trampoline.
+    uint64_t (*original)(void*,void*,void*,const void*,MxAudioRamp);
+    while(!(original=__atomic_load_n(&mx_audio_consume_original,__ATOMIC_ACQUIRE)))sched_yield();
+    uint64_t result=original(sink,main_mix,passthrough,objects,ramp);
+    mx_audio_objects=previous;return result;
+}
+static int mx_audio_find(struct dl_phdr_info *info,size_t size,void *unused) {
+    (void)size;(void)unused;
+    if(!strstr(info->dlpi_name,"/libMetaXRAudioWwise.so"))return 0;
+    if(mx_audio_base)return 1;
+    const unsigned char id[20]={0xe1,0x61,0x9e,0x7f,0xb8,0x39,0xba,0xdf,0x0e,0xa5,0xec,0xc2,0x2d,0x9f,0x02,0x8d,0x0b,0x17,0xc3,0x4d};
+    int match=0;
+    for(unsigned i=0;i<info->dlpi_phnum;i++)if(info->dlpi_phdr[i].p_type==PT_NOTE) {
+        const unsigned char *p=(void*)(info->dlpi_addr+info->dlpi_phdr[i].p_vaddr);
+        const unsigned char *end=p+info->dlpi_phdr[i].p_memsz;
+        while(p+sizeof(Elf64_Nhdr)<=end) {
+            const Elf64_Nhdr *note=(void*)p;
+            const unsigned char *name=p+sizeof(*note),*desc=name+((note->n_namesz+3)&~3u);
+            const unsigned char *next=desc+((note->n_descsz+3)&~3u);
+            if(next>end || next<=p)break;
+            if(note->n_type==NT_GNU_BUILD_ID && note->n_namesz==4 && !memcmp(name,"GNU",4) && note->n_descsz==20 && !memcmp(desc,id,20))match=1;
+            p=next;
+        }
+    }
+    if(!match){__atomic_store_n(&mx_audio_checked,1,__ATOMIC_RELEASE);return 1;}
+    const uint32_t consume[4]={0xd10743ff,0x6d1623e9,0xa9177bfd,0xa9186ffc};
+    const uint32_t kill[4]={0xa9bd7bfd,0xf9000bf5,0xa9024ff4,0x910003fd};
+    unsigned char *base=(void*)info->dlpi_addr;
+    if(memcmp(base+0x2c8fac,consume,16) || memcmp(base+0x2be2c0,kill,16) || memcmp(base+0x2be7b0,kill,16)) {
+        __atomic_store_n(&mx_audio_checked,1,__ATOMIC_RELEASE);return 1;
+    }
+    __atomic_store_n(&mx_audio_base,info->dlpi_addr,__ATOMIC_RELEASE);
+    void *original=mx_audio_detour(base+0x2c8fac,(void*)mx_audio_consume,consume);
+    __atomic_store_n(&mx_audio_consume_original,original,__ATOMIC_RELEASE);
+    if(!__atomic_load_n(&mx_audio_consume_original,__ATOMIC_ACQUIRE)) {
+        __atomic_store_n(&mx_audio_base,0,__ATOMIC_RELEASE);return 1;
+    }
+    if(!mx_audio_detour(base+0x2be2c0,(void*)mx_audio_kill_experimental,kill) || !mx_audio_detour(base+0x2be7b0,(void*)mx_audio_kill_regular,kill)) {
+        LOG("FrameBridge audio metadata: incomplete installation");return 1;
+    }
+    LOG("FrameBridge audio metadata: metadata reclamation follows current audio-frame references; Meta audio base=%p",base);
+    return 1;
+}
+static pthread_mutex_t mx_audio_install_mutex=PTHREAD_MUTEX_INITIALIZER;
+static void mx_audio_initialize(void) {
+    if(__atomic_load_n(&mx_audio_base,__ATOMIC_ACQUIRE) || __atomic_load_n(&mx_audio_checked,__ATOMIC_ACQUIRE))return;
+    // until the game loads the library: look at most once a second (dl_iterate_phdr takes the linker's lock)
+    static _Atomic long mx_audio_last_scan;
+    struct timespec now;clock_gettime(CLOCK_MONOTONIC,&now);
+    if(now.tv_sec==mx_audio_last_scan)return;
+    mx_audio_last_scan=now.tv_sec;
+    if(pthread_mutex_trylock(&mx_audio_install_mutex))return;
+    if(!mx_audio_page)mx_audio_page=(size_t)sysconf(_SC_PAGESIZE);
+    if(!mx_audio_base)dl_iterate_phdr(mx_audio_find,NULL);
+    pthread_mutex_unlock(&mx_audio_install_mutex);
+}
+#else
+static void mx_audio_initialize(void) {}
+#endif

native/adapter/audio_metadata_queue.h

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-3.0-only
+#pragma once
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+// Experimental lifetime repair for the pinned Meta XR Audio Wwise build.
+// A queued metadata object must not be reclaimed while the current immutable
+// AkAudioObjects snapshot still references it. Preserve the SDK's queue mutex,
+// virtual destructor, list linkage, audio processing, and dirty-flag writes.
+static _Thread_local const unsigned char *mx_audio_objects;
+static unsigned mx_audio_held,mx_audio_reclaimed;
+static int mx_audio_referenced(const void *pointer) {
+    if(!mx_audio_objects)return 0;
+    uint32_t count;memcpy(&count,mx_audio_objects,4);
+    const unsigned char *const *objects;memcpy(&objects,mx_audio_objects+16,8);
+    // Refuse to reclaim on an unrecognised snapshot rather than dereferencing
+    // unbounded arrays. These bounds exceed the game's ordinary voice counts.
+    if(count>4096 || (count && !objects))return 1;
+    for(unsigned i=0;i<count;i++) {
+        const unsigned char *object=objects[i];if(!object)continue;
+        uint32_t metadata_count;const unsigned char *metadata;
+        memcpy(&metadata,object+104,8);memcpy(&metadata_count,object+112,4);
+        if(metadata_count>4096 || (metadata_count && !metadata))return 1;
+        for(unsigned j=0;j<metadata_count;j++) {
+            const void *parameter;memcpy(&parameter,metadata+(size_t)j*24+8,8);
+            if(parameter==pointer)return 1;
+        }
+    }
+    return 0;
+}
+// Caller holds the original queue's mutex, just as ExecuteKillList did.
+static void mx_audio_drain(void **head,size_t next_offset) {
+    void **link=head;
+    while(*link) {
+        void *pointer=*link;void **next=(void**)((unsigned char*)pointer+next_offset);
+        if(mx_audio_referenced(pointer)) {
+            link=next;
+            unsigned held=__atomic_fetch_add(&mx_audio_held,1,__ATOMIC_RELAXED);
+            if(held<8)LOG("FrameBridge audio metadata: queued metadata=%p still referenced by audio frame; retained",pointer);
+        } else {
+            *link=*next;
+            void (**table)(void*)=*(void (***)(void*))pointer;
+            table[1](pointer);
+            __atomic_fetch_add(&mx_audio_reclaimed,1,__ATOMIC_RELAXED);
+        }
+    }
+}

native/adapter/cube_standin.c

@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// Included by frame_adapter.c (after layer_emul_gl.c, whose GL entry points it shares). cube_standin (default on):
+// the Frame's runtime has no cube layers (XR_KHR_composition_layer_cube) and refuses cube swapchains (faceCount 6)
+// with XR_ERROR_RUNTIME_FAILURE. OVRPlugin doesn't check: it goes on with "CreateSwapchain for eye 0: 0x0, 0 stages"
+// and writes past its empty image list in the next ovrp_EndFrame4 (Unity's render thread SIGSEGV in memset, e.g.
+// Budget Cuts Ultimate's cube-map overlay, GitHub #107). Only when the runtime refused one, a cube swapchain is served
+// by the adapter instead: one GL cube-map texture (the format, size and mip levels asked for) in the app's current
+// GLES context, acquire/wait/release succeed at once. The app renders or copies into it as usual; layers that use it
+// are dropped in xrEndFrame (the runtime couldn't show them anyway). Vulkan sessions (no current EGL context) keep
+// the runtime's error.
+#define STANDIN_MAX 8
+static struct { XrSwapchain handle; GLuint tex; } standins[STANDIN_MAX];
+static pthread_mutex_t standin_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int standin_find(XrSwapchain handle) {
+    if (!handle) return -1;
+    int slot = -1;
+    pthread_mutex_lock(&standin_lock);
+    for (int i = 0; i < STANDIN_MAX && slot < 0; ++i)
+        if (standins[i].handle == handle) slot = i;
+    pthread_mutex_unlock(&standin_lock);
+    return slot;
+}
+
+static int is_standin(XrSwapchain handle) { return cube_standin && standin_find(handle) >= 0; }
+
+// After the runtime refused a swapchain: serve a cube stand-in if it was a cube swapchain in a GLES context.
+static XrResult standin_after_failure(const XrSwapchainCreateInfo *info, XrSwapchain *out, XrResult result) {
+    if (XR_SUCCEEDED(result) || !cube_standin || !info || !out || info->faceCount != 6) return result;
+    if (info->width != info->height || !info->width || info->arraySize > 1) return result;
+    if (!p_eglCreateContext && !emul_load_gl()) { LOG("cube_standin: no GLES, the runtime's error stays"); return result; }
+    if (p_eglGetCurrentContext() == EGL_NO_CONTEXT) {
+        LOG("cube_standin: no current GLES context (Vulkan?), the runtime's error stays");
+        return result;
+    }
+    int slot = -1;
+    pthread_mutex_lock(&standin_lock);
+    for (int i = 0; i < STANDIN_MAX && slot < 0; ++i)
+        if (!standins[i].handle) slot = i;
+    if (slot >= 0) standins[slot].handle = (XrSwapchain)1;  // reserved
+    pthread_mutex_unlock(&standin_lock);
+    if (slot < 0) { LOG("cube_standin: too many cube swapchains, the runtime's error stays"); return result; }
+    GLsizei levels = info->mipCount > 1 ? (GLsizei)info->mipCount : 1;
+    for (int i = 0; i < 8 && p_glGetError() != GL_NO_ERROR; ++i) {}
+    GLint previous = 0;
+    p_glGetIntegerv(GL_TEXTURE_BINDING_CUBE_MAP, &previous);
+    GLuint tex = 0;
+    p_glGenTextures(1, &tex);
+    p_glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
+    p_glTexStorage2D(GL_TEXTURE_CUBE_MAP, levels, (GLenum)info->format, (GLsizei)info->width, (GLsizei)info->height);
+    GLenum err = p_glGetError();
+    p_glBindTexture(GL_TEXTURE_CUBE_MAP, (GLuint)previous);  // the app's binding, untouched
+    if (err != GL_NO_ERROR) {
+        p_glDeleteTextures(1, &tex);
+        pthread_mutex_lock(&standin_lock);
+        standins[slot].handle = XR_NULL_HANDLE;
+        pthread_mutex_unlock(&standin_lock);
+        LOG("cube_standin: couldn't make a %ux%u cube map (GL 0x%x), the runtime's error stays", info->width,
+            info->height, err);
+        return result;
+    }
+    XrSwapchain handle = FAKE_HANDLE(XrSwapchain);
+    pthread_mutex_lock(&standin_lock);
+    standins[slot].handle = handle;
+    standins[slot].tex = tex;
+    pthread_mutex_unlock(&standin_lock);
+    *out = handle;
+    LOG("cube_standin: runtime refused a %ux%u cube swapchain (result=%d): served by FrameBridge (GL cube map %u, "
+        "%d levels); its cube layers are dropped", info->width, info->height, result, tex, (int)levels);
+    return XR_SUCCESS;
+}
+
+static XrResult standin_enumerate(XrSwapchain handle, uint32_t capacity, uint32_t *count, XrSwapchainImageBaseHeader *images) {
+    if (!count) return XR_ERROR_VALIDATION_FAILURE;
+    *count = 1;
+    if (!capacity) return XR_SUCCESS;
+    if (!images) return XR_ERROR_VALIDATION_FAILURE;
+    if (images->type != XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_ES_KHR) return XR_ERROR_VALIDATION_FAILURE;
+    int slot = standin_find(handle);
+    ((emul_gles_image *)images)[0].image = slot >= 0 ? standins[slot].tex : 0;
+    return XR_SUCCESS;
+}
+
+static void standin_destroy(XrSwapchain handle) {
+    pthread_mutex_lock(&standin_lock);
+    for (int i = 0; i < STANDIN_MAX; ++i)
+        if (standins[i].handle == handle) {
+            if (p_eglGetCurrentContext && p_eglGetCurrentContext() != EGL_NO_CONTEXT) p_glDeleteTextures(1, &standins[i].tex);
+            standins[i].handle = XR_NULL_HANDLE;
+            standins[i].tex = 0;
+        }
+    pthread_mutex_unlock(&standin_lock);
+}
+
+// A layer that shows a stand-in: never passed to the runtime (whatever layer_fix says).
+static int layer_uses_standin(const XrCompositionLayerBaseHeader *layer) {
+    if (!cube_standin || !layer) return 0;
+    switch (layer->type) {
+    case XR_TYPE_COMPOSITION_LAYER_CUBE_KHR:
+        return is_standin(((const XrCompositionLayerCubeKHR *)layer)->swapchain);
+    case XR_TYPE_COMPOSITION_LAYER_QUAD:
+        return is_standin(((const XrCompositionLayerQuad *)layer)->subImage.swapchain);
+    case XR_TYPE_COMPOSITION_LAYER_CYLINDER_KHR:
+        return is_standin(((const XrCompositionLayerCylinderKHR *)layer)->subImage.swapchain);
+    case XR_TYPE_COMPOSITION_LAYER_EQUIRECT_KHR:
+        return is_standin(((const XrCompositionLayerEquirectKHR *)layer)->subImage.swapchain);
+    case XR_TYPE_COMPOSITION_LAYER_EQUIRECT2_KHR:
+        return is_standin(((const XrCompositionLayerEquirect2KHR *)layer)->subImage.swapchain);
+    case XR_TYPE_COMPOSITION_LAYER_PROJECTION: {
+        const XrCompositionLayerProjection *p = (const XrCompositionLayerProjection *)layer;
+        for (uint32_t v = 0; v < p->viewCount; ++v)
+            if (is_standin(p->views[v].subImage.swapchain)) return 1;
+        return 0;
+    }
+    default:
+        return 0;
+    }
+}
+
+// XR_FB_swapchain_update_state on a stand-in: nothing to update (only hooked when the runtime has the function).
+static PFN_xrUpdateSwapchainFB real_update_swapchain;
+static PFN_xrGetSwapchainStateFB real_get_swapchain_state;
+static XRAPI_ATTR XrResult XRAPI_CALL standin_update_swapchain(XrSwapchain swapchain, const XrSwapchainStateBaseHeaderFB *state) {
+    if (is_standin(swapchain)) return XR_SUCCESS;
+    return real_update_swapchain ? real_update_swapchain(swapchain, state) : XR_ERROR_FUNCTION_UNSUPPORTED;
+}
+static XRAPI_ATTR XrResult XRAPI_CALL standin_get_swapchain_state(XrSwapchain swapchain, XrSwapchainStateBaseHeaderFB *state) {
+    if (is_standin(swapchain)) return XR_ERROR_VALIDATION_FAILURE;  // no state to report (apps treat it as "unsupported")
+    return real_get_swapchain_state ? real_get_swapchain_state(swapchain, state) : XR_ERROR_FUNCTION_UNSUPPORTED;
+}

native/adapter/eye_debug.c

@@ -40,6 +40,7 @@ static XRAPI_ATTR XrResult XRAPI_CALL eye_hook_xrReleaseSwapchainImage(XrSwapcha
                                                                        const XrSwapchainImageReleaseInfo *info) {
     PFN_xrReleaseSwapchainImage fn = (PFN_xrReleaseSwapchainImage)lookup(active_instance, "xrReleaseSwapchainImage");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) return XR_SUCCESS;
     if (release_wait_active()) eye_wait_for_gpu();
     XrResult result = fn(swapchain, info);
     if (eye_debug) {

native/adapter/forwarders.S

@@ -1,19 +1,4 @@
 // Generated: register-preserving tail-call forwarders (see frame_adapter.c).
-    .text
-    .p2align 2
-    .globl xrApplyHapticFeedback
-    .type xrApplyHapticFeedback, %function
-xrApplyHapticFeedback:
-    adrp x16, fwd_xrApplyHapticFeedback
-    ldr x16, [x16, :lo12:fwd_xrApplyHapticFeedback]
-    br x16
-    .size xrApplyHapticFeedback, .-xrApplyHapticFeedback
-    .data
-    .p2align 3
-    .globl fwd_xrApplyHapticFeedback
-    .hidden fwd_xrApplyHapticFeedback
-fwd_xrApplyHapticFeedback:
-    .quad frame_unsupported
     .text
     .p2align 2
     .globl xrAttachSessionActionSets
@@ -28,21 +13,6 @@ xrAttachSessionActionSets:
     .globl fwd_xrAttachSessionActionSets
     .hidden fwd_xrAttachSessionActionSets
 fwd_xrAttachSessionActionSets:
-    .quad frame_unsupported
-    .text
-    .p2align 2
-    .globl xrBeginFrame
-    .type xrBeginFrame, %function
-xrBeginFrame:
-    adrp x16, fwd_xrBeginFrame
-    ldr x16, [x16, :lo12:fwd_xrBeginFrame]
-    br x16
-    .size xrBeginFrame, .-xrBeginFrame
-    .data
-    .p2align 3
-    .globl fwd_xrBeginFrame
-    .hidden fwd_xrBeginFrame
-fwd_xrBeginFrame:
     .quad frame_unsupported
     .text
     .p2align 2
@@ -403,21 +373,6 @@ xrPathToString:
     .globl fwd_xrPathToString
     .hidden fwd_xrPathToString
 fwd_xrPathToString:
-    .quad frame_unsupported
-    .text
-    .p2align 2
-    .globl xrReleaseSwapchainImage
-    .type xrReleaseSwapchainImage, %function
-xrReleaseSwapchainImage:
-    adrp x16, fwd_xrReleaseSwapchainImage
-    ldr x16, [x16, :lo12:fwd_xrReleaseSwapchainImage]
-    br x16
-    .size xrReleaseSwapchainImage, .-xrReleaseSwapchainImage
-    .data
-    .p2align 3
-    .globl fwd_xrReleaseSwapchainImage
-    .hidden fwd_xrReleaseSwapchainImage
-fwd_xrReleaseSwapchainImage:
     .quad frame_unsupported
     .text
     .p2align 2
@@ -523,20 +478,5 @@ xrSyncActions:
     .globl fwd_xrSyncActions
     .hidden fwd_xrSyncActions
 fwd_xrSyncActions:
-    .quad frame_unsupported
-    .text
-    .p2align 2
-    .globl xrWaitSwapchainImage
-    .type xrWaitSwapchainImage, %function
-xrWaitSwapchainImage:
-    adrp x16, fwd_xrWaitSwapchainImage
-    ldr x16, [x16, :lo12:fwd_xrWaitSwapchainImage]
-    br x16
-    .size xrWaitSwapchainImage, .-xrWaitSwapchainImage
-    .data
-    .p2align 3
-    .globl fwd_xrWaitSwapchainImage
-    .hidden fwd_xrWaitSwapchainImage
-fwd_xrWaitSwapchainImage:
     .quad frame_unsupported
     .section .note.GNU-stack,"",%progbits

native/adapter/forwarders.inc

@@ -1,7 +1,5 @@
 // Generated from overport 3.4.3 libopenxr_loader_generic.so exports minus hooked functions.
-FORWARD(xrApplyHapticFeedback)
 FORWARD(xrAttachSessionActionSets)
-FORWARD(xrBeginFrame)
 FORWARD(xrBeginSession)
 FORWARD(xrCreateAction)
 FORWARD(xrCreateActionSet)
@@ -26,7 +24,6 @@ FORWARD(xrGetReferenceSpaceBoundsRect)
 FORWARD(xrGetSystem)
 FORWARD(xrGetViewConfigurationProperties)
 FORWARD(xrPathToString)
-FORWARD(xrReleaseSwapchainImage)
 FORWARD(xrRequestExitSession)
 FORWARD(xrResultToString)
 FORWARD(xrStopHapticFeedback)
@@ -34,4 +31,3 @@ FORWARD(xrStringToPath)
 FORWARD(xrStructureTypeToString)
 FORWARD(xrSuggestInteractionProfileBindings)
 FORWARD(xrSyncActions)
-FORWARD(xrWaitSwapchainImage)

native/adapter/forwarders_arm32.S

@@ -3,23 +3,6 @@
     .arm
     .text
     .p2align 2
-    .globl xrApplyHapticFeedback
-    .type xrApplyHapticFeedback, %function
-xrApplyHapticFeedback:
-    ldr ip, 1f
-2:  add ip, pc, ip
-    ldr ip, [ip]
-    bx ip
-1:  .word fwd_xrApplyHapticFeedback - (2b + 8)
-    .size xrApplyHapticFeedback, .-xrApplyHapticFeedback
-    .data
-    .p2align 2
-    .globl fwd_xrApplyHapticFeedback
-    .hidden fwd_xrApplyHapticFeedback
-fwd_xrApplyHapticFeedback:
-    .word frame_unsupported
-    .text
-    .p2align 2
     .globl xrAttachSessionActionSets
     .type xrAttachSessionActionSets, %function
 xrAttachSessionActionSets:
@@ -34,23 +17,6 @@ xrAttachSessionActionSets:
     .globl fwd_xrAttachSessionActionSets
     .hidden fwd_xrAttachSessionActionSets
 fwd_xrAttachSessionActionSets:
-    .word frame_unsupported
-    .text
-    .p2align 2
-    .globl xrBeginFrame
-    .type xrBeginFrame, %function
-xrBeginFrame:
-    ldr ip, 1f
-2:  add ip, pc, ip
-    ldr ip, [ip]
-    bx ip
-1:  .word fwd_xrBeginFrame - (2b + 8)
-    .size xrBeginFrame, .-xrBeginFrame
-    .data
-    .p2align 2
-    .globl fwd_xrBeginFrame
-    .hidden fwd_xrBeginFrame
-fwd_xrBeginFrame:
     .word frame_unsupported
     .text
     .p2align 2
@@ -459,23 +425,6 @@ xrPathToString:
     .globl fwd_xrPathToString
     .hidden fwd_xrPathToString
 fwd_xrPathToString:
-    .word frame_unsupported
-    .text
-    .p2align 2
-    .globl xrReleaseSwapchainImage
-    .type xrReleaseSwapchainImage, %function
-xrReleaseSwapchainImage:
-    ldr ip, 1f
-2:  add ip, pc, ip
-    ldr ip, [ip]
-    bx ip
-1:  .word fwd_xrReleaseSwapchainImage - (2b + 8)
-    .size xrReleaseSwapchainImage, .-xrReleaseSwapchainImage
-    .data
-    .p2align 2
-    .globl fwd_xrReleaseSwapchainImage
-    .hidden fwd_xrReleaseSwapchainImage
-fwd_xrReleaseSwapchainImage:
     .word frame_unsupported
     .text
     .p2align 2
@@ -595,22 +544,5 @@ xrSyncActions:
     .globl fwd_xrSyncActions
     .hidden fwd_xrSyncActions
 fwd_xrSyncActions:
-    .word frame_unsupported
-    .text
-    .p2align 2
-    .globl xrWaitSwapchainImage
-    .type xrWaitSwapchainImage, %function
-xrWaitSwapchainImage:
-    ldr ip, 1f
-2:  add ip, pc, ip
-    ldr ip, [ip]
-    bx ip
-1:  .word fwd_xrWaitSwapchainImage - (2b + 8)
-    .size xrWaitSwapchainImage, .-xrWaitSwapchainImage
-    .data
-    .p2align 2
-    .globl fwd_xrWaitSwapchainImage
-    .hidden fwd_xrWaitSwapchainImage
-fwd_xrWaitSwapchainImage:
     .word frame_unsupported
     .section .note.GNU-stack,"",%progbits

native/adapter/frame_adapter.c

@@ -15,6 +15,7 @@
 //  * drops requested instance extensions the runtime lacks (e.g. XR_FB_passthrough);
 //  * retries rejected swapchains with 1 sample / a supported format (swapchain_fix, overport #71);
 //  * drops composition layers that reference swapchains that failed to create (layer_fix);
+//  * serves cube swapchains the runtime refuses as GL cube maps and drops their layers (cube_standin, cube_standin.c);
 //  * optionally requests mutable-format swapchain images (mutable_fix, off by default);
 //  * optionally swaps left/right images of stereo projection layers (swap_eyes, off by default);
 //  * emulates XR_FB_passthrough with XR_ENVIRONMENT_BLEND_MODE_ALPHA_BLEND when the runtime lacks it
@@ -26,6 +27,9 @@
 //    render_model.c);
 //  * per-game session fixes (session_fixes.c, all off by default): layer_debug diagnostics, stable_local,
 //    focus_hold, aim pose correction (aim_pitch/aim_yaw/aim_forward), refresh_rate;
+//  * optionally logs controller-input diagnostics: suggested interaction profiles and the runtime's answers, each
+//    hand's current profile, functions the runtime lacks, failing input/haptics/perf calls (input_diag,
+//    input_diag.c, off by default);
 //  * optionally shows 360° (equirect/equirect2) layers as cube-face quads drawn by a worker thread with a shared
 //    GLES context (equirect_emul, layer_emul_gl.c; GLES sessions only, off by default).
 //
@@ -69,6 +73,7 @@ static void fb_log(const char *fmt, ...) {
     funlockfile(log_file);
 }
 #define LOG(...) fb_log(__VA_ARGS__)
+#include "audio_metadata.h"
 
 static void *loader;
 static PFN_xrGetInstanceProcAddr next_gipa;
@@ -82,8 +87,28 @@ static void surf_on_destroy(XrSwapchain handle);
 
 static float scale = 1.0f;
 static int foveation_fix = 1;
+// hide XR_FB_space_warp: games then render every frame themselves (UE5 Application SpaceWarp flickered on the Frame,
+// e.g. Into The Radius 2; OVRPort's patch_disable_space_warp doesn't reach UE5's OpenXR plugin)
+static int hide_space_warp = 0;
+static int strip_color_bias = 0;
+static int snapshot = 0;  // seconds between eye-image snapshots (snapshot_gl.c; 0 = off)
+static char snap_dir[256];
+static void snap_on_create(XrSwapchain handle, const XrSwapchainCreateInfo *info);
+static void snap_on_destroy(XrSwapchain handle);
+static void snap_on_enumerate(XrSwapchain handle, uint32_t count, const XrSwapchainImageBaseHeader *images);
+static void snap_on_acquire(XrSwapchain handle, uint32_t index);
+static void snap_end_frame(const XrFrameEndInfo *info);
+static int frame_balance = 0;  // end a still-open frame before the next xrBeginFrame
+static int frame_begins, frame_discarded, frame_ends, frame_balanced;  // per pacing period (layer_debug)
+static int frame_open;
+static int sc_acquires, sc_waits, sc_releases, sc_wait_fails;  // per pacing period (layer_debug)  // drop XrCompositionLayerColorScaleBiasKHR (the runtime's color pass)
 static int controller_fix = 1;
 static int swapchain_fix = 1;
+static int cube_standin = 1;  // cube swapchains the runtime refuses: served by the adapter (cube_standin.c)
+static int rect_clamp = 1;
+static int pose_consistency = 0;  // repeat xrLocateViews queries for one display time get the same poses (GitHub #8)  // clamp submitted image rects to their swapchain (SteamVR rejects a 1 px overrun)
+static int pose_time_fix;   // poses asked for at CLOCK_MONOTONIC "now" or far in the past: at XrTime "now" (pose_time.c)
+static int pose_debug;      // diagnostics: requested pose times vs the predicted display time (pose_time.c)
 static int layer_fix = 1;
 static int mutable_fix = 0;
 static int swap_eyes = 0;
@@ -106,10 +131,14 @@ static int controller_models;  // serve Frame controller models via XR_FB_render
 // Per-game settings, all off by default (session_fixes.c, layer_emul_gl.c).
 static int sync_guard;       // xrSyncActions one at a time with xrPollEvent, paused briefly after focus returns
 static int profile_remap = 1; // Meta's newer controller profiles (rejected by the Frame) -> oculus/touch_controller
+static int proximity_emul;   // finger proximity from capacitive touch: 1 thumb, 2 thumb + index (session_fixes.c)
+static int runtime_has_proximity;  // the runtime has XR_FB_touch_controller_proximity itself
 static int layer_debug;      // diagnostics: layers, swapchains, session states, spaces, aim/grip, refresh rates
+static int input_diag;       // diagnostics: controller profiles, bindings, missing functions, failing input calls
 static int stable_local;     // keep every LOCAL space the app creates on the session-start origin
-static int focus_hold;       // hide brief focus dips once the session has been focused for a while
-static float focus_hold_ms = 1000;  // longest focus dip focus_hold hides
+static int focus_hold = 1;   // hide brief focus dips once the session has been focused for a while
+static float focus_hold_ms = 5000;  // longest focus dip focus_hold hides
+static float haptic_scale = 1.0f;   // vibration strength (0-1), all vibration types (xrApplyHapticFeedback)
 static float aim_pitch, aim_yaw, aim_forward;  // aim pose correction (degrees, degrees, metres)
 static float refresh_rate;   // requested display refresh rate (Hz), 0 = the app's choice
 static int equirect_emul;    // show 360 layers as cube faces (GLES)
@@ -129,8 +158,17 @@ static void read_settings(const char *path) {
     while (fgets(line, sizeof(line), f)) {
         if (sscanf(line, "scale=%f", &value) == 1 && value >= 0.5f && value <= 2.0f) scale = value;
         if (sscanf(line, "foveation_fix=%f", &value) == 1) foveation_fix = value != 0;
+        if (sscanf(line, "hide_space_warp=%f", &value) == 1) hide_space_warp = value != 0;
+        if (sscanf(line, "strip_color_bias=%f", &value) == 1) strip_color_bias = (int)value;
+        if (sscanf(line, "frame_balance=%f", &value) == 1) frame_balance = value != 0;
+        if (sscanf(line, "snapshot=%f", &value) == 1) snapshot = value > 0 ? (int)value : 0;
         if (sscanf(line, "controller_fix=%f", &value) == 1) controller_fix = value != 0;
         if (sscanf(line, "swapchain_fix=%f", &value) == 1) swapchain_fix = value != 0;
+        if (sscanf(line, "cube_standin=%f", &value) == 1) cube_standin = value != 0;
+        if (sscanf(line, "rect_clamp=%f", &value) == 1) rect_clamp = value != 0;
+        if (sscanf(line, "pose_consistency=%f", &value) == 1) pose_consistency = value != 0;
+        if (sscanf(line, "pose_debug=%f", &value) == 1) pose_debug = value != 0;
+        if (sscanf(line, "pose_time_fix=%f", &value) == 1) pose_time_fix = value != 0;
         if (sscanf(line, "layer_fix=%f", &value) == 1) layer_fix = value != 0;
         if (sscanf(line, "mutable_fix=%f", &value) == 1) mutable_fix = value != 0;
         if (sscanf(line, "swap_eyes=%f", &value) == 1) swap_eyes = value != 0;
@@ -146,14 +184,17 @@ static void read_settings(const char *path) {
         if (sscanf(line, "scene_depth=%f", &value) == 1 && value > 0.5f && value < 20.0f) scene_depth = value;
         if (sscanf(line, "controller_models=%f", &value) == 1) controller_models = value != 0;
         if (sscanf(line, "layer_debug=%f", &value) == 1) layer_debug = value != 0;
+        if (sscanf(line, "input_diag=%f", &value) == 1) input_diag = value != 0;
         if (sscanf(line, "surface_emul=%f", &value) == 1) surface_emul = value != 0;
         if (sscanf(line, "eye_debug=%f", &value) == 1) eye_debug = value != 0;
         if (sscanf(line, "release_wait=%f", &value) == 1) release_wait = (int)value;
         if (sscanf(line, "profile_remap=%f", &value) == 1) profile_remap = value != 0;
+        if (sscanf(line, "proximity_emul=%f", &value) == 1 && value >= 0 && value <= 2) proximity_emul = (int)value;
         if (sscanf(line, "sync_guard=%f", &value) == 1) sync_guard = value != 0;
         if (sscanf(line, "stable_local=%f", &value) == 1) stable_local = value != 0;
         if (sscanf(line, "focus_hold=%f", &value) == 1) focus_hold = value != 0;
         if (sscanf(line, "focus_hold_ms=%f", &value) == 1 && value >= 100 && value <= 5000) focus_hold_ms = value;
+        if (sscanf(line, "haptic_scale=%f", &value) == 1 && value >= 0 && value <= 1) haptic_scale = value;
         if (sscanf(line, "aim_pitch=%f", &value) == 1 && fabsf(value) <= 90) aim_pitch = value;
         if (sscanf(line, "aim_yaw=%f", &value) == 1 && fabsf(value) <= 90) aim_yaw = value;
         if (sscanf(line, "aim_forward=%f", &value) == 1 && fabsf(value) <= 0.5f) aim_forward = value;
@@ -200,10 +241,20 @@ static void initialize(void) {
     }
     const char *env = getenv("FRAMEBRIDGE_CONFIG");
     if (env && *env) read_settings(env);
+    if (snapshot && *process && !strchr(process, '/')) {
+        snprintf(snap_dir, sizeof(snap_dir), "/sdcard/Android/data/%s/files", process);
+        LOG("per-game: snapshot every %d s to %s/fb_snap_N.ppm", snapshot, snap_dir);
+    }
     if (eye_debug && *process && !strchr(process, '/')) {
         snprintf(path, sizeof(path), "/sdcard/Android/data/%s/files/framebridge.log", process);
         log_file = fopen(path, "a");
     }
+    if (input_diag) LOG("per-game: input_diag=1 (controller-input diagnostics)");
+    if (proximity_emul) LOG("per-game: proximity_emul=%d (finger proximity from capacitive touch: %s)", proximity_emul,
+                            proximity_emul > 1 ? "thumb + index" : "thumb");
+    if (hide_space_warp) LOG("per-game: hide_space_warp=1 (XR_FB_space_warp hidden, space warp info removed)");
+    if (strip_color_bias) LOG("per-game: strip_color_bias=%d (layer color scale/bias removed)", strip_color_bias);
+    if (frame_balance) LOG("per-game: frame_balance=1 (an open frame is ended before the next one begins)");
     if (eye_debug || release_wait) LOG("per-game: eye_debug=%d release_wait=%d log_file=%s", eye_debug, release_wait,
                                        log_file ? path : "none");
     if (controller_models && *process && !strchr(process, '/')) render_model_init(process);
@@ -261,7 +312,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateInstance(const XrInstanceCreateInfo *info
     }
 
     XrInstanceCreateInfo fixed = *info;
-    const char **names = calloc(info->enabledExtensionCount + 2, sizeof(*names));
+    const char **names = calloc(info->enabledExtensionCount + 3, sizeof(*names));
     if (!names) { free(available); return XR_ERROR_OUT_OF_MEMORY; }
     uint32_t kept = 0;
     for (uint32_t i = 0; i < info->enabledExtensionCount; ++i) {
@@ -269,6 +320,10 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateInstance(const XrInstanceCreateInfo *info
         int supported = !available;  // if we could not enumerate, pass everything through
         for (uint32_t j = 0; available && j < available_count && !supported; ++j)
             supported = !strcmp(available[j].extensionName, ext);
+        if (hide_space_warp && !strcmp(ext, "XR_FB_space_warp")) {
+            LOG("hide_space_warp: XR_FB_space_warp not enabled");
+            continue;
+        }
         if (supported) names[kept++] = ext;
         else if (scene_emul && is_scene_extension(ext)) {
             if (!emulate_scene) LOG("emulating Meta scene/spatial-entity extensions from the guardian bounds");
@@ -285,6 +340,19 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateInstance(const XrInstanceCreateInfo *info
         names[kept++] = "XR_KHR_android_create_instance";
         LOG("added %s", "XR_KHR_android_create_instance");
     }
+    {   // no graphics API extension at all: Meta's runtime still accepts a GLES session, the Frame's doesn't
+        // (Lambda1VR's TBXR enables only XR_EXT_local_floor). Add GLES, which every such app uses, if offered.
+        int graphics = 0, gles_offered = 0;
+        for (uint32_t i = 0; i < kept; ++i)
+            graphics |= !strcmp(names[i], "XR_KHR_opengl_es_enable") || !strcmp(names[i], "XR_KHR_vulkan_enable") ||
+                        !strcmp(names[i], "XR_KHR_vulkan_enable2");
+        for (uint32_t j = 0; available && j < available_count; ++j)
+            gles_offered |= !strcmp(available[j].extensionName, "XR_KHR_opengl_es_enable");
+        if (!graphics && gles_offered) {
+            names[kept++] = "XR_KHR_opengl_es_enable";
+            LOG("added XR_KHR_opengl_es_enable (the app enabled no graphics API extension)");
+        }
+    }
     if (refresh_rate > 0) {  // the refresh_rate setting needs XR_FB_display_refresh_rate even if the app doesn't use it
         int requested = 0, offered = 0;
         for (uint32_t i = 0; i < kept; ++i) requested |= !strcmp(names[i], "XR_FB_display_refresh_rate");
@@ -293,8 +361,17 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateInstance(const XrInstanceCreateInfo *info
     }
     fixed.enabledExtensionNames = names;
     fixed.enabledExtensionCount = kept;
+    {   // what the runtime gets (diagnostics: e.g. a graphics extension the app forgot)
+        char list[1024] = "";
+        for (uint32_t i = 0; i < kept; ++i) {
+            size_t len = strlen(list);
+            snprintf(list + len, sizeof list - len, "%s%s", i ? " " : "", names[i] + (strncmp(names[i], "XR_", 3) ? 0 : 3));
+        }
+        LOG("xrCreateInstance with %u extension(s): %s", kept, list);
+    }
     for (uint32_t j = 0; available && j < available_count; ++j)
         if (!strcmp(available[j].extensionName, "XR_FB_composition_layer_image_layout")) runtime_has_image_layout = 1;
+        else if (!strcmp(available[j].extensionName, "XR_FB_touch_controller_proximity")) runtime_has_proximity = 1;
     // Layer types are only valid if their extension ends up enabled; some apps submit them regardless.
     int has_equirect = 0, has_equirect2 = 0, has_cylinder = 0, has_cube = 0;
     for (uint32_t i = 0; i < kept; ++i) {
@@ -305,10 +382,11 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateInstance(const XrInstanceCreateInfo *info
     }
     no_equirect = !has_equirect; no_equirect2 = !has_equirect2; no_cylinder = !has_cylinder; no_cube = !has_cube;
     free(available);
+    mx_audio_initialize();
     XrResult result = fn(&fixed, instance);
     free(names);
     LOG("xrCreateInstance result=%d", result);
-    if (XR_SUCCEEDED(result)) active_instance = *instance;
+    if (XR_SUCCEEDED(result)) { active_instance = *instance; mx_audio_initialize(); }
     return result;
 }
 
@@ -379,6 +457,45 @@ static void remember_swapchain(XrSwapchain handle) {
     pthread_mutex_unlock(&swapchains_lock);
 }
 
+// Swapchain sizes, to keep submitted image rects inside them (rect_clamp).
+#define MAX_SIZES 256
+static struct { XrSwapchain handle; uint32_t w, h; } sizes[MAX_SIZES];
+static pthread_mutex_t sizes_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static void note_swapchain_size(XrSwapchain handle, uint32_t w, uint32_t h) {
+    pthread_mutex_lock(&sizes_lock);
+    int slot = -1;
+    for (int i = 0; i < MAX_SIZES; ++i) {
+        if (sizes[i].handle == handle) { slot = i; break; }
+        if (slot < 0 && sizes[i].handle == XR_NULL_HANDLE) slot = i;
+    }
+    if (slot >= 0) { sizes[slot].handle = handle; sizes[slot].w = w; sizes[slot].h = h; }
+    pthread_mutex_unlock(&sizes_lock);
+}
+
+static int swapchain_size(XrSwapchain handle, uint32_t *w, uint32_t *h) {
+    int found = 0;
+    pthread_mutex_lock(&sizes_lock);
+    for (int i = 0; i < MAX_SIZES && !found; ++i)
+        if (sizes[i].handle == handle && handle != XR_NULL_HANDLE) { *w = sizes[i].w; *h = sizes[i].h; found = 1; }
+    pthread_mutex_unlock(&sizes_lock);
+    return found;
+}
+
+// Clamp `r` to a w x h image; returns whether it changed.
+static int clamp_rect(XrRect2Di *r, uint32_t w, uint32_t h) {
+    XrRect2Di c = *r;
+    if (c.offset.x < 0) { c.extent.width += c.offset.x; c.offset.x = 0; }
+    if (c.offset.y < 0) { c.extent.height += c.offset.y; c.offset.y = 0; }
+    if ((uint32_t)c.offset.x >= w || (uint32_t)c.offset.y >= h) return 0;  // nothing sensible to keep: leave it
+    if ((int64_t)c.offset.x + c.extent.width > (int64_t)w) c.extent.width = (int32_t)(w - (uint32_t)c.offset.x);
+    if ((int64_t)c.offset.y + c.extent.height > (int64_t)h) c.extent.height = (int32_t)(h - (uint32_t)c.offset.y);
+    if (c.extent.width <= 0 || c.extent.height <= 0) return 0;
+    int changed = memcmp(&c, r, sizeof c) != 0;
+    *r = c;
+    return changed;
+}
+
 static void forget_swapchain(XrSwapchain handle) {
     pthread_mutex_lock(&swapchains_lock);
     for (size_t i = 0; i < swapchain_count; ++i)
@@ -395,6 +512,10 @@ static int emul_is_virtual(XrSwapchain handle);
 static void emul_virtual_destroy(XrSwapchain handle);
 static XrResult emul_virtual_enumerate(XrSwapchain handle, uint32_t capacity, uint32_t *count, XrSwapchainImageBaseHeader *images);
 static void emul_on_acquire(XrSwapchain handle, uint32_t index);
+static XrResult standin_after_failure(const XrSwapchainCreateInfo *info, XrSwapchain *out, XrResult result);
+static int is_standin(XrSwapchain handle);
+static void standin_destroy(XrSwapchain handle);
+static XrResult standin_enumerate(XrSwapchain handle, uint32_t capacity, uint32_t *count, XrSwapchainImageBaseHeader *images);
 
 static int known_swapchain(XrSwapchain handle) {
     int found = 0;
@@ -420,6 +541,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateSwapchain(XrSession session, const XrSwap
     if (equirect_emul && swapchain && emul_virtual_create(session, &fixed, swapchain)) {
         remember_swapchain(*swapchain);
         emul_on_create_swapchain(*swapchain, &fixed);
+        snap_on_create(*swapchain, &fixed);
         return XR_SUCCESS;
     }
     XrResult result = fn(session, &fixed, swapchain);
@@ -428,11 +550,13 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateSwapchain(XrSession session, const XrSwap
         (unsigned long long)fixed.usageFlags, (unsigned long long)fixed.createFlags, result);
     if (XR_SUCCEEDED(result)) {
         remember_swapchain(*swapchain);
+        note_swapchain_size(*swapchain, fixed.width, fixed.height);
         flip_on_create_swapchain(*swapchain, &fixed);
         emul_on_create_swapchain(*swapchain, &fixed);
+        snap_on_create(*swapchain, &fixed);
         return result;
     }
-    if (!swapchain_fix) return result;
+    if (!swapchain_fix) return standin_after_failure(&fixed, swapchain, result);
 
     // Frame's runtime rejects some GLES formats (GL_RGBA8) and MSAA swapchains (overport #71).
     if (fixed.sampleCount > 1) {
@@ -450,19 +574,27 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateSwapchain(XrSession session, const XrSwap
     }
     if (XR_SUCCEEDED(result)) {
         remember_swapchain(*swapchain);
+        note_swapchain_size(*swapchain, fixed.width, fixed.height);
         flip_on_create_swapchain(*swapchain, &fixed);
         emul_on_create_swapchain(*swapchain, &fixed);
+        snap_on_create(*swapchain, &fixed);
     }
-    return result;
+    return standin_after_failure(&fixed, swapchain, result);
 }
 
 XRAPI_ATTR XrResult XRAPI_CALL xrDestroySwapchain(XrSwapchain swapchain) {
     PFN_xrDestroySwapchain fn = (PFN_xrDestroySwapchain)lookup(active_instance, "xrDestroySwapchain");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (layer_debug) {
+        static int logged;
+        if (logged++ < 200) LOG("layer_debug: xrDestroySwapchain %p", (void *)swapchain);
+    }
+    if (is_standin(swapchain)) { standin_destroy(swapchain); return XR_SUCCESS; }
     forget_swapchain(swapchain);
     surf_on_destroy(swapchain);
     flip_on_destroy(swapchain);
     emul_on_destroy_swapchain(swapchain);
+    snap_on_destroy(swapchain);
     if (equirect_emul && emul_is_virtual(swapchain)) { emul_virtual_destroy(swapchain); return XR_SUCCESS; }
     return fn(swapchain);
 }
@@ -639,6 +771,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrGetSystemProperties(XrInstance instance, XrSyst
 }
 
 #include "flip_vk.c"
+#include "pose_time.c"
 
 // XR_KHR_convert_timespec_time for runtimes that lack it (Frame): XrTime is derived from the monotonic clock
 // using the offset measured at the last xrWaitFrame. The runtime's own implementation is preferred.
@@ -648,10 +781,14 @@ static PFN_xrConvertTimeToTimespecTimeKHR runtime_time_to_timespec;
 static XRAPI_ATTR XrResult XRAPI_CALL emu_timespec_to_time(XrInstance instance, const struct timespec *ts, XrTime *time) {
     if (runtime_timespec_to_time) {
         XrResult r = runtime_timespec_to_time(instance, ts, time);
-        if (r != XR_ERROR_FUNCTION_UNSUPPORTED) return r;
+        if (r != XR_ERROR_FUNCTION_UNSUPPORTED) {
+            if (XR_SUCCEEDED(r) && time) pose_time_note("xrConvertTimespecTimeToTimeKHR (runtime)", 0, 0, *time);
+            return r;
+        }
     }
     if (!ts || !time) return XR_ERROR_VALIDATION_FAILURE;
     *time = (XrTime)((int64_t)ts->tv_sec * 1000000000ll + ts->tv_nsec + (xr_time_calibrated ? xr_time_offset : 0));
+    pose_time_note("xrConvertTimespecTimeToTimeKHR", 0, 0, *time);
     return XR_SUCCESS;
 }
 static XRAPI_ATTR XrResult XRAPI_CALL emu_time_to_timespec(XrInstance instance, XrTime time, struct timespec *ts) {
@@ -667,6 +804,8 @@ static XRAPI_ATTR XrResult XRAPI_CALL emu_time_to_timespec(XrInstance instance,
 }
 
 XRAPI_ATTR XrResult XRAPI_CALL xrLocateSpace(XrSpace space, XrSpace baseSpace, XrTime time, XrSpaceLocation *location) {
+    time = pose_time_fixed(time);
+    pose_time_note("xrLocateSpace", (uint64_t)(uintptr_t)space, (uint64_t)(uintptr_t)baseSpace, time);
     if (emulate_scene && location) {
         XrPosef pose; XrSpaceLocationFlags flags;
         if (locate_fake(space, baseSpace, time, &pose, &flags)) {
@@ -682,6 +821,14 @@ XRAPI_ATTR XrResult XRAPI_CALL xrLocateSpace(XrSpace space, XrSpace baseSpace, X
 static XrResult locate_spaces_common(const char *name, XrSession session, const XrSpacesLocateInfo *info,
                                      XrSpaceLocations *locations) {
     int any_fake = 0;
+    XrSpacesLocateInfo moved;
+    if (info && pose_time_fix) {
+        moved = *info;
+        moved.time = pose_time_fixed(info->time);
+        info = &moved;
+    }
+    if (info) pose_time_note(name, info->spaceCount ? (uint64_t)(uintptr_t)info->spaces[0] : 0,
+                             (uint64_t)(uintptr_t)info->baseSpace, info->time);
     if (emulate_scene && info && locations) {
         any_fake = fake_space_index(info->baseSpace) >= 0;
         for (uint32_t i = 0; i < info->spaceCount && !any_fake; ++i) any_fake = fake_space_index(info->spaces[i]) >= 0;
@@ -712,15 +859,48 @@ XRAPI_ATTR XrResult XRAPI_CALL xrDestroySpace(XrSpace space) {
     return fn ? fn(space) : XR_ERROR_FUNCTION_UNSUPPORTED;
 }
 
+#include "input_diag.c"
 #include "session_fixes.c"
 #include "layer_emul_gl.c"
+#include "cube_standin.c"
+#include "snapshot_gl.c"
 #include "surface_swapchain.c"
 #include "eye_debug.c"
 
+// OpenXR requires xrGet*GraphicsRequirementsKHR before xrCreateSession; Meta's runtime doesn't enforce it, the Frame's
+// does (XR_ERROR_GRAPHICS_REQUIREMENTS_CALL_MISSING, e.g. Lambda1VR's TBXR). Ask on the app's behalf, once, and retry.
+static int ask_graphics_requirements(XrInstance instance, const XrSessionCreateInfo *info) {
+    const XrBaseInStructure *binding = info ? (const XrBaseInStructure *)info->next : NULL;
+    for (; binding; binding = binding->next) {
+        const char *name = NULL;
+        XrStructureType type = 0;
+        if (binding->type == (XrStructureType)1000024001) {  // XR_TYPE_GRAPHICS_BINDING_OPENGL_ES_ANDROID_KHR
+            name = "xrGetOpenGLESGraphicsRequirementsKHR";
+            type = (XrStructureType)1000024003;               // XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_ES_KHR
+        } else if (binding->type == (XrStructureType)1000025000) {  // XR_TYPE_GRAPHICS_BINDING_VULKAN_KHR
+            name = "xrGetVulkanGraphicsRequirementsKHR";
+            type = (XrStructureType)1000025002;               // XR_TYPE_GRAPHICS_REQUIREMENTS_VULKAN_KHR
+        }
+        if (!name) continue;
+        // XrGraphicsRequirementsOpenGLESKHR and ...VulkanKHR share this layout
+        struct { XrStructureType type; void *next; XrVersion min, max; } req = {type, NULL, 0, 0};
+        typedef XrResult (XRAPI_PTR *PFN_requirements)(XrInstance, XrSystemId, void *);
+        PFN_requirements get = (PFN_requirements)lookup(instance, name);
+        if (!get && type == (XrStructureType)1000025002)  // XR_KHR_vulkan_enable2 apps: same struct and call
+            get = (PFN_requirements)lookup(instance, "xrGetVulkanGraphicsRequirements2KHR");
+        XrResult r = get ? get(instance, info->systemId, &req) : XR_ERROR_FUNCTION_UNSUPPORTED;
+        LOG("xrCreateSession: the app skipped %s; asked for it (result=%d)", name, (int)r);
+        return XR_SUCCEEDED(r);
+    }
+    return 0;
+}
+
 XRAPI_ATTR XrResult XRAPI_CALL xrCreateSession(XrInstance instance, const XrSessionCreateInfo *info, XrSession *session) {
     PFN_xrCreateSession fn = (PFN_xrCreateSession)lookup(instance, "xrCreateSession");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
     XrResult result = fn(instance, info, session);
+    if (result == XR_ERROR_GRAPHICS_REQUIREMENTS_CALL_MISSING && ask_graphics_requirements(instance, info))
+        result = fn(instance, info, session);
     if (XR_SUCCEEDED(result)) {
         flip_emul = flip_emul_setting;
         flip_on_create_session(info);
@@ -731,23 +911,106 @@ XRAPI_ATTR XrResult XRAPI_CALL xrCreateSession(XrInstance instance, const XrSess
     return result;
 }
 
+// Vibrations: logged (the first few, to see what games ask for) and scaled by haptic_scale. Plain vibrations, Meta's
+// amplitude envelopes and PCM buffers all pass here: games' own calls, OVRPort's VrApi bridge and the xrshim alike.
+static int haptics_logged;
+static XrResult apply_haptics(XrSession session, const XrHapticActionInfo *info, const XrHapticBaseHeader *feedback) {
+    PFN_xrApplyHapticFeedback fn = (PFN_xrApplyHapticFeedback)lookup(active_instance, "xrApplyHapticFeedback");
+    if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (!feedback) return fn(session, info, feedback);
+    if (feedback->type == XR_TYPE_HAPTIC_VIBRATION) {
+        XrHapticVibration v = *(const XrHapticVibration *)feedback;
+        if (haptics_logged++ < 8)
+            LOG("haptic: vibration amplitude=%.2f duration=%lld ns frequency=%.0f (scale %.2f)", v.amplitude,
+                (long long)v.duration, v.frequency, haptic_scale);
+        v.amplitude *= haptic_scale;
+        if (v.amplitude <= 0.001f) {
+            // OVRPlugin stops a vibration by sending amplitude 0 with its usual 2 s duration (Jurassic World, The Boys
+            // VR): on a Quest that stops the motor; OpenXR's stop is xrStopHapticFeedback, and without it the last
+            // buzz ran its full 2 s
+            PFN_xrStopHapticFeedback stop = (PFN_xrStopHapticFeedback)lookup(active_instance, "xrStopHapticFeedback");
+            if (stop) return stop(session, info);
+        }
+        return fn(session, info, (const XrHapticBaseHeader *)&v);
+    }
+    if (feedback->type == (XrStructureType)1000173001 || feedback->type == (XrStructureType)1000209001) {
+        // XR_TYPE_HAPTIC_AMPLITUDE_ENVELOPE_VIBRATION_FB / XR_TYPE_HAPTIC_PCM_VIBRATION_FB: a sample buffer
+        typedef struct { XrStructureType type; const void *next; XrDuration duration; uint32_t count; const float *s; } env_t;
+        typedef struct { XrStructureType type; const void *next; uint32_t count; const float *s; float rate; XrBool32 append;
+                         uint32_t *consumed; } pcm_t;
+        int envelope = feedback->type == (XrStructureType)1000173001;
+        uint32_t n = envelope ? ((const env_t *)feedback)->count : ((const pcm_t *)feedback)->count;
+        const float *in = envelope ? ((const env_t *)feedback)->s : ((const pcm_t *)feedback)->s;
+        if (haptics_logged++ < 8) {
+            float peak = 0;
+            for (uint32_t i = 0; in && i < n; ++i) peak = fmaxf(peak, in[i]);
+            LOG("haptic: %s %u samples peak=%.2f (scale %.2f)", envelope ? "envelope" : "pcm", n, peak, haptic_scale);
+        }
+        if (haptic_scale >= 0.999f || !in || !n || n > 1u << 20) return fn(session, info, feedback);
+        float *scaled = malloc(n * sizeof *scaled);
+        if (!scaled) return fn(session, info, feedback);
+        for (uint32_t i = 0; i < n; ++i) scaled[i] = in[i] * haptic_scale;
+        XrResult r;
+        if (envelope) { env_t e = *(const env_t *)feedback; e.s = scaled; r = fn(session, info, (const XrHapticBaseHeader *)&e); }
+        else { pcm_t c = *(const pcm_t *)feedback; c.s = scaled; r = fn(session, info, (const XrHapticBaseHeader *)&c); }
+        free(scaled);
+        return r;
+    }
+    return fn(session, info, feedback);
+}
+
+XRAPI_ATTR XrResult XRAPI_CALL xrApplyHapticFeedback(XrSession session, const XrHapticActionInfo *info,
+                                                    const XrHapticBaseHeader *feedback) {
+    XrResult result = apply_haptics(session, info, feedback);
+    if (input_diag && XR_FAILED(result))  // always hooked (haptic_scale), so input_diag reports failures here
+        diag_call_failed("xrApplyHapticFeedback", result,
+                         feedback && feedback->type != XR_TYPE_HAPTIC_VIBRATION ? "(not XrHapticVibration)" : NULL);
+    return result;
+}
+
 XRAPI_ATTR XrResult XRAPI_CALL xrEnumerateSwapchainImages(XrSwapchain swapchain, uint32_t capacity, uint32_t *count,
         XrSwapchainImageBaseHeader *images) {
     PFN_xrEnumerateSwapchainImages fn = (PFN_xrEnumerateSwapchainImages)lookup(active_instance, "xrEnumerateSwapchainImages");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) return standin_enumerate(swapchain, capacity, count, images);
     XrResult result = equirect_emul && emul_is_virtual(swapchain) ? emul_virtual_enumerate(swapchain, capacity, count, images)
                                                                   : fn(swapchain, capacity, count, images);
     if (XR_SUCCEEDED(result) && images && capacity && count) {
         flip_on_enumerate_images(swapchain, *count, images);
         emul_on_enumerate(swapchain, *count < capacity ? *count : capacity, images);
+        snap_on_enumerate(swapchain, *count < capacity ? *count : capacity, images);
     }
     return result;
 }
 
+// counted for layer_debug (an app that skips the wait or release keeps runtime resources alive)
+XRAPI_ATTR XrResult XRAPI_CALL xrWaitSwapchainImage(XrSwapchain swapchain, const XrSwapchainImageWaitInfo *info) {
+    PFN_xrWaitSwapchainImage fn = (PFN_xrWaitSwapchainImage)lookup(active_instance, "xrWaitSwapchainImage");
+    if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) return XR_SUCCESS;
+    XrResult result = fn(swapchain, info);
+    __atomic_add_fetch(&sc_waits, 1, __ATOMIC_RELAXED);
+    if (result != XR_SUCCESS) __atomic_add_fetch(&sc_wait_fails, 1, __ATOMIC_RELAXED);
+    return result;
+}
+
+XRAPI_ATTR XrResult XRAPI_CALL xrReleaseSwapchainImage(XrSwapchain swapchain, const XrSwapchainImageReleaseInfo *info) {
+    PFN_xrReleaseSwapchainImage fn = (PFN_xrReleaseSwapchainImage)lookup(active_instance, "xrReleaseSwapchainImage");
+    if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) return XR_SUCCESS;
+    __atomic_add_fetch(&sc_releases, 1, __ATOMIC_RELAXED);
+    return fn(swapchain, info);
+}
+
 XRAPI_ATTR XrResult XRAPI_CALL xrAcquireSwapchainImage(XrSwapchain swapchain, const XrSwapchainImageAcquireInfo *info,
         uint32_t *index) {
     PFN_xrAcquireSwapchainImage fn = (PFN_xrAcquireSwapchainImage)lookup(active_instance, "xrAcquireSwapchainImage");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) {  // adapter-served cube stand-in: one image
+        if (!index) return XR_ERROR_VALIDATION_FAILURE;
+        *index = 0;
+        return XR_SUCCESS;
+    }
     if (equirect_emul && emul_is_virtual(swapchain)) {  // adapter-served write-once picture: one image
         if (!index) return XR_ERROR_VALIDATION_FAILURE;
         *index = 0;
@@ -755,7 +1018,12 @@ XRAPI_ATTR XrResult XRAPI_CALL xrAcquireSwapchainImage(XrSwapchain swapchain, co
         return XR_SUCCESS;
     }
     XrResult result = fn(swapchain, info, index);
-    if (XR_SUCCEEDED(result) && index) { flip_on_acquire(swapchain, *index); emul_on_acquire(swapchain, *index); }
+    __atomic_add_fetch(&sc_acquires, 1, __ATOMIC_RELAXED);
+    if (XR_SUCCEEDED(result) && index) {
+        flip_on_acquire(swapchain, *index);
+        emul_on_acquire(swapchain, *index);
+        snap_on_acquire(swapchain, *index);
+    }
     return result;
 }
 
@@ -769,6 +1037,7 @@ static XrSession focused_session = XR_NULL_HANDLE;
 static int kicks_pending = -1;  // -1: not yet armed
 
 XRAPI_ATTR XrResult XRAPI_CALL xrPollEvent(XrInstance instance, XrEventDataBuffer *event) {
+    mx_audio_initialize();
     PFN_xrPollEvent fn = (PFN_xrPollEvent)lookup(instance, "xrPollEvent");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
     if (emulate_scene && event) {
@@ -852,16 +1121,85 @@ XRAPI_ATTR XrResult XRAPI_CALL xrWaitFrame(XrSession session, const XrFrameWaitI
         // predictedDisplayTime is about one display period ahead of "now".
         xr_time_offset = (int64_t)(state->predictedDisplayTime - state->predictedDisplayPeriod) - mono;
         xr_time_calibrated = 1;
+        last_display_period = state->predictedDisplayPeriod;
+        pose_time_sample(xr_time_offset);
+        pose_time_display(state->predictedDisplayTime);
+        pose_time_note_offset((long long)(state->predictedDisplayTime - mono));
         if (layer_debug) debug_aim_vs_grip(state->predictedDisplayTime);
     }
     return result;
 }
 
+// pose_consistency (GitHub #8, proposed by Klownicle for I Am Cat): the game asks xrLocateViews ~3 times per frame
+// for the same display time and got slightly different poses each time (tenths of a degree), so parts of its pipeline
+// rendered with different heads: judder. The first fully tracked answer for (session, space, view configuration,
+// display time) is kept and repeated; a new display time, another space or a failed/untracked answer is never cached.
+#define POSE_CACHE 8
+static struct {
+    XrSession session; XrSpace space; XrViewConfigurationType config; XrTime time;
+    XrViewStateFlags flags; uint32_t count; XrPosef pose[2]; XrFovf fov[2];
+} pose_cache[POSE_CACHE];
+static int pose_cache_next, pose_cache_hits;
+static pthread_mutex_t pose_cache_lock = PTHREAD_MUTEX_INITIALIZER;
+#define POSE_TRACKED (XR_VIEW_STATE_ORIENTATION_VALID_BIT | XR_VIEW_STATE_POSITION_VALID_BIT | \
+                      XR_VIEW_STATE_ORIENTATION_TRACKED_BIT | XR_VIEW_STATE_POSITION_TRACKED_BIT)
+
+static int pose_cache_lookup(XrSession session, const XrViewLocateInfo *info, XrViewState *state, uint32_t capacity,
+                             uint32_t *count, XrView *views) {
+    int hit = 0;
+    pthread_mutex_lock(&pose_cache_lock);
+    for (int i = 0; i < POSE_CACHE && !hit; ++i) {
+        if (pose_cache[i].session != session || pose_cache[i].space != info->space ||
+            pose_cache[i].config != info->viewConfigurationType || pose_cache[i].time != info->displayTime ||
+            !pose_cache[i].count || capacity < pose_cache[i].count)
+            continue;
+        state->viewStateFlags = pose_cache[i].flags;
+        *count = pose_cache[i].count;
+        for (uint32_t v = 0; v < pose_cache[i].count; ++v) {  // only the values: the caller's type/next stay
+            views[v].pose = pose_cache[i].pose[v];
+            views[v].fov = pose_cache[i].fov[v];
+        }
+        hit = 1;
+    }
+    if (hit && pose_cache_hits++ == 0) LOG("pose_consistency: repeated query answered with the frame's first poses");
+    pthread_mutex_unlock(&pose_cache_lock);
+    return hit;
+}
+
+static void pose_cache_store(XrSession session, const XrViewLocateInfo *info, const XrViewState *state,
+                             uint32_t count, const XrView *views) {
+    if (count == 0 || count > 2 || (state->viewStateFlags & POSE_TRACKED) != POSE_TRACKED) return;
+    pthread_mutex_lock(&pose_cache_lock);
+    int slot = pose_cache_next;
+    pose_cache_next = (pose_cache_next + 1) % POSE_CACHE;
+    pose_cache[slot].session = session;
+    pose_cache[slot].space = info->space;
+    pose_cache[slot].config = info->viewConfigurationType;
+    pose_cache[slot].time = info->displayTime;
+    pose_cache[slot].flags = state->viewStateFlags;
+    pose_cache[slot].count = count;
+    for (uint32_t v = 0; v < count; ++v) {
+        pose_cache[slot].pose[v] = views[v].pose;
+        pose_cache[slot].fov[v] = views[v].fov;
+    }
+    pthread_mutex_unlock(&pose_cache_lock);
+}
+
 XRAPI_ATTR XrResult XRAPI_CALL xrLocateViews(XrSession session, const XrViewLocateInfo *info, XrViewState *state,
         uint32_t capacity, uint32_t *count, XrView *views) {
     PFN_xrLocateViews fn = (PFN_xrLocateViews)lookup(active_instance, "xrLocateViews");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    XrViewLocateInfo moved;
+    if (info && pose_time_fix) {
+        moved = *info;
+        moved.displayTime = pose_time_fixed(info->displayTime);
+        info = &moved;
+    }
+    if (info) pose_time_note("xrLocateViews", (uint64_t)(uintptr_t)info->space, 0, info->displayTime);
+    int cacheable = pose_consistency && info && state && count && views && capacity > 0;
+    if (cacheable && pose_cache_lookup(session, info, state, capacity, count, views)) return XR_SUCCESS;
     XrResult result = fn(session, info, state, capacity, count, views);
+    if (cacheable && result == XR_SUCCESS) pose_cache_store(session, info, state, *count, views);
     if (equirect_emul && XR_SUCCEEDED(result) && info && count && views && state &&
         (state->viewStateFlags & XR_VIEW_STATE_ORIENTATION_VALID_BIT))
         emul_on_locate_views(info->space, info->displayTime, *count < capacity ? *count : capacity, views);
@@ -904,9 +1242,40 @@ XRAPI_ATTR XrResult XRAPI_CALL xrLocateViews(XrSession session, const XrViewLoca
     return result;
 }
 
+// xrBeginFrame: counted for layer_debug. A game that begins a new frame while the previous one is still open
+// (never ended) makes the runtime discard it; the Frame's runtime then never recycles that frame's GPU timing
+// command buffer (Vader Immortal: ~430 GPU mappings / 20 MB a second). frame_balance ends the open frame first,
+// with no layers, as the runtime expects.
+static XrTime last_begin_display_time;
+XRAPI_ATTR XrResult XRAPI_CALL xrBeginFrame(XrSession session, const XrFrameBeginInfo *info) {
+    PFN_xrBeginFrame fn = (PFN_xrBeginFrame)lookup(active_instance, "xrBeginFrame");
+    if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (frame_open && frame_balance) {
+        PFN_xrEndFrame end = (PFN_xrEndFrame)lookup(active_instance, "xrEndFrame");
+        XrFrameEndInfo empty = {XR_TYPE_FRAME_END_INFO, NULL, last_begin_display_time ? last_begin_display_time
+                                                                                        : last_predicted_time,
+                                XR_ENVIRONMENT_BLEND_MODE_OPAQUE, 0, NULL};
+        XrResult r = end ? end(session, &empty) : XR_ERROR_FUNCTION_UNSUPPORTED;
+        static int logged;
+        if (logged++ < 3) LOG("frame_balance: ended an open frame before xrBeginFrame (result %d)", r);
+        __atomic_add_fetch(&frame_balanced, 1, __ATOMIC_RELAXED);
+    }
+    XrResult result = fn(session, info);
+    __atomic_add_fetch(&frame_begins, 1, __ATOMIC_RELAXED);
+    if (result == XR_FRAME_DISCARDED) __atomic_add_fetch(&frame_discarded, 1, __ATOMIC_RELAXED);
+    if (XR_SUCCEEDED(result)) {
+        frame_open = 1;
+        last_begin_display_time = last_predicted_time;
+    }
+    return result;
+}
+
 XRAPI_ATTR XrResult XRAPI_CALL xrEndFrame(XrSession session, const XrFrameEndInfo *info) {
     PFN_xrEndFrame fn = (PFN_xrEndFrame)lookup(active_instance, "xrEndFrame");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    frame_open = 0;
+    __atomic_add_fetch(&frame_ends, 1, __ATOMIC_RELAXED);
+    snap_end_frame(info);
     if (eye_debug) eye_debug_end_frame(session, info);
     {   // frame pacing statistics every ~5 s: fps and submitted-vs-predicted display time
         static struct timespec start;
@@ -923,12 +1292,25 @@ XRAPI_ATTR XrResult XRAPI_CALL xrEndFrame(XrSession session, const XrFrameEndInf
         if (elapsed >= 5.0) {
             LOG("pacing: %.1f fps, displayTime vs predicted: avg %.2f ms, max %.2f ms", frames / elapsed,
                 drift_sum / (double)frames / 1e6, drift_max / 1e6);
+            if (layer_debug)
+                LOG("layer_debug: swapchain images: %d acquired, %d waited (%d not ok), %d released",
+                    __atomic_exchange_n(&sc_acquires, 0, __ATOMIC_RELAXED),
+                    __atomic_exchange_n(&sc_waits, 0, __ATOMIC_RELAXED),
+                    __atomic_exchange_n(&sc_wait_fails, 0, __ATOMIC_RELAXED),
+                    __atomic_exchange_n(&sc_releases, 0, __ATOMIC_RELAXED));
+            if (layer_debug)
+                LOG("layer_debug: frames: %d xrBeginFrame (%d discarded), %d xrEndFrame, %d balanced",
+                    __atomic_exchange_n(&frame_begins, 0, __ATOMIC_RELAXED),
+                    __atomic_exchange_n(&frame_discarded, 0, __ATOMIC_RELAXED),
+                    __atomic_exchange_n(&frame_ends, 0, __ATOMIC_RELAXED),
+                    __atomic_exchange_n(&frame_balanced, 0, __ATOMIC_RELAXED));
             if (layer_debug)
                 LOG("layer_debug: input: %d xrSyncActions (%d ok, last %d), %d bool reads, %d pressed",
                     __atomic_exchange_n(&input_syncs, 0, __ATOMIC_RELAXED),
                     __atomic_exchange_n(&input_sync_ok, 0, __ATOMIC_RELAXED), input_last_sync_result,
                     __atomic_exchange_n(&input_bool_reads, 0, __ATOMIC_RELAXED),
                     __atomic_exchange_n(&input_bool_true, 0, __ATOMIC_RELAXED));
+            pose_time_report();
             frames = 0; drift_sum = drift_max = 0;
         }
     }
@@ -1020,6 +1402,12 @@ XRAPI_ATTR XrResult XRAPI_CALL xrEndFrame(XrSession session, const XrFrameEndInf
             ++dropped;  // an emulated video surface without a frame yet
             continue;
         }
+        if (layer_uses_standin(layer)) {  // a cube layer whose swapchain the runtime refused (cube_standin.c)
+            static int logged;
+            if (logged++ < 3) LOG("cube_standin: dropped a layer (type=%d) that shows a stand-in swapchain", layer->type);
+            ++dropped;
+            continue;
+        }
         if (!layer || (layer_fix && !layer_usable(layer))) { ++dropped; continue; }
         if (layer->type == XR_TYPE_COMPOSITION_LAYER_QUAD) {
             const XrCompositionLayerQuad *flipped = flip_quad(session, (const XrCompositionLayerQuad *)layer, &quads[count]);
@@ -1056,6 +1444,73 @@ XRAPI_ATTR XrResult XRAPI_CALL xrEndFrame(XrSession session, const XrFrameEndInf
             if (!logged++) LOG("strip_depth: removed depth info from projection layer");
             ++swapped;
         }
+        {
+            // XR_KHR_composition_layer_color_scale_bias (1000034000) on the layer itself: logged when its values
+            // change (layer_debug); with strip_color_bias the runtime never gets it (Vader Immortal: the Frame's
+            // runtime allocates GPU memory for it every frame and never frees it)
+            const XrBaseInStructure *head = (const XrBaseInStructure *)layer->next;
+            const XrCompositionLayerColorScaleBiasKHR *cb = NULL;
+            for (const XrBaseInStructure *n = head; n; n = n->next)
+                if (n->type == XR_TYPE_COMPOSITION_LAYER_COLOR_SCALE_BIAS_KHR) cb = (const XrCompositionLayerColorScaleBiasKHR *)n;
+            if (cb && layer_debug) {
+                static float last[8] = {-1};
+                float now[8] = {cb->colorScale.r, cb->colorScale.g, cb->colorScale.b, cb->colorScale.a,
+                                cb->colorBias.r, cb->colorBias.g, cb->colorBias.b, cb->colorBias.a};
+                static int logged;
+                if (memcmp(now, last, sizeof(now)) && logged++ < 100) {
+                    LOG("layer_debug: layer type=%d color scale %.2f %.2f %.2f %.2f bias %.2f %.2f %.2f %.2f", layer->type,
+                        now[0], now[1], now[2], now[3], now[4], now[5], now[6], now[7]);
+                    memcpy(last, now, sizeof(now));
+                }
+            }
+            if (cb && strip_color_bias && (layer->type == XR_TYPE_COMPOSITION_LAYER_PROJECTION ||
+                                           layer->type == XR_TYPE_COMPOSITION_LAYER_QUAD)) {
+                const XrBaseInStructure *rest = head;  // skip leading color structs; one further down drops the chain
+                while (rest && rest->type == XR_TYPE_COMPOSITION_LAYER_COLOR_SCALE_BIAS_KHR) rest = rest->next;
+                for (const XrBaseInStructure *n = rest; n; n = n->next)
+                    if (n->type == XR_TYPE_COMPOSITION_LAYER_COLOR_SCALE_BIAS_KHR) rest = NULL;
+                if (strip_color_bias > 1) rest = NULL;  // 2: the layer's whole extension chain (diagnostics)
+                if (layer->type == XR_TYPE_COMPOSITION_LAYER_PROJECTION) {
+                    if (layer != (const XrCompositionLayerBaseHeader *)&projections[count])
+                        projections[count] = *(const XrCompositionLayerProjection *)layer;
+                    projections[count].next = rest;
+                    layer = (const XrCompositionLayerBaseHeader *)&projections[count];
+                } else {
+                    if (layer != (const XrCompositionLayerBaseHeader *)&quads[count])
+                        quads[count] = *(const XrCompositionLayerQuad *)layer;
+                    quads[count].next = rest;
+                    layer = (const XrCompositionLayerBaseHeader *)&quads[count];
+                }
+                static int logged;
+                if (!logged++) LOG("strip_color_bias: removed the color scale/bias from a layer");
+                ++swapped;
+            }
+        }
+        if (hide_space_warp && layer->type == XR_TYPE_COMPOSITION_LAYER_PROJECTION &&
+            ((const XrCompositionLayerProjection *)layer)->viewCount == 2) {
+            // The game may still attach XrCompositionLayerSpaceWarpInfoFB (1000171000) to its views: OVRPort's
+            // dispatcher offers XR_FB_space_warp itself even when hidden here. Unlink it (keeping what follows when
+            // it heads the chain, else the whole chain) so the runtime never uses the motion vectors.
+            const XrCompositionLayerProjection *src = (const XrCompositionLayerProjection *)layer;
+            int found = 0;
+            for (uint32_t v = 0; v < 2; ++v)
+                for (const XrBaseInStructure *n = (const XrBaseInStructure *)src->views[v].next; n; n = n->next)
+                    found |= n->type == 1000171000;
+            if (found) {
+                if (layer != (const XrCompositionLayerBaseHeader *)&projections[count]) projections[count] = *src;
+                for (uint32_t v = 0; v < 2; ++v) {
+                    views[count][v] = src->views[v];
+                    const XrBaseInStructure *head = (const XrBaseInStructure *)src->views[v].next;
+                    if (head && head->type == 1000171000) views[count][v].next = head->next;
+                    else if (head) views[count][v].next = NULL;
+                }
+                projections[count].views = views[count];
+                layer = (const XrCompositionLayerBaseHeader *)&projections[count];
+                static int logged;
+                if (!logged++) LOG("hide_space_warp: removed space warp info from the eye images");
+                ++swapped;
+            }
+        }
         if (swap_eyes && layer->type == XR_TYPE_COMPOSITION_LAYER_PROJECTION &&
             ((const XrCompositionLayerProjection *)layer)->viewCount == 2) {
             // Show each eye the image the game rendered for it: keep poses/FOVs, swap sub-images.
@@ -1073,6 +1528,51 @@ XRAPI_ATTR XrResult XRAPI_CALL xrEndFrame(XrSession session, const XrFrameEndInf
             layer = (const XrCompositionLayerBaseHeader *)&projections[count];
             ++swapped;
         }
+        if (rect_clamp) {
+            // Keep every image rect inside its swapchain: Unity/OVRPlugin can size the eye area a few pixels past
+            // the image on some Frames (PowerWash Simulator: rect 268+1656 on a 1920 wide swapchain) and SteamVR
+            // then rejects every frame with XR_ERROR_SWAPCHAIN_RECT_INVALID (-25) (GitHub #39).
+            uint32_t w, h;
+            if (layer->type == XR_TYPE_COMPOSITION_LAYER_PROJECTION &&
+                ((const XrCompositionLayerProjection *)layer)->viewCount <= 2) {
+                const XrCompositionLayerProjection *cur = (const XrCompositionLayerProjection *)layer;
+                int over = 0;
+                for (uint32_t v = 0; v < cur->viewCount; ++v) {
+                    XrRect2Di r = cur->views[v].subImage.imageRect;
+                    if (swapchain_size(cur->views[v].subImage.swapchain, &w, &h) && clamp_rect(&r, w, h)) over = 1;
+                }
+                if (over) {
+                    if (layer != (const XrCompositionLayerBaseHeader *)&projections[count]) projections[count] = *cur;
+                    if (projections[count].views != views[count])
+                        for (uint32_t v = 0; v < cur->viewCount; ++v) views[count][v] = cur->views[v];
+                    for (uint32_t v = 0; v < cur->viewCount; ++v)
+                        if (swapchain_size(views[count][v].subImage.swapchain, &w, &h) &&
+                            clamp_rect(&views[count][v].subImage.imageRect, w, h)) {
+                            static int logged;
+                            if (logged++ < 3)
+                                LOG("rect_clamp: view %u image rect clamped to %dx%d at %d,%d (swapchain %ux%u)", v,
+                                    views[count][v].subImage.imageRect.extent.width,
+                                    views[count][v].subImage.imageRect.extent.height,
+                                    views[count][v].subImage.imageRect.offset.x,
+                                    views[count][v].subImage.imageRect.offset.y, w, h);
+                        }
+                    projections[count].views = views[count];
+                    layer = (const XrCompositionLayerBaseHeader *)&projections[count];
+                    ++swapped;
+                }
+            } else if (layer->type == XR_TYPE_COMPOSITION_LAYER_QUAD) {
+                const XrCompositionLayerQuad *q = (const XrCompositionLayerQuad *)layer;
+                XrRect2Di r = q->subImage.imageRect;
+                if (swapchain_size(q->subImage.swapchain, &w, &h) && clamp_rect(&r, w, h)) {
+                    if (layer != (const XrCompositionLayerBaseHeader *)&quads[count]) quads[count] = *q;
+                    quads[count].subImage.imageRect = r;
+                    layer = (const XrCompositionLayerBaseHeader *)&quads[count];
+                    ++swapped;
+                    static int logged;
+                    if (!logged++) LOG("rect_clamp: quad image rect clamped (swapchain %ux%u)", w, h);
+                }
+            }
+        }
         kept[count++] = layer;
     }
     XrFrameEndInfo fixed = *info;
@@ -1148,6 +1648,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrGetCurrentInteractionProfile(XrSession session,
         (PFN_xrGetCurrentInteractionProfile)lookup(active_instance, "xrGetCurrentInteractionProfile");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
     XrResult result = fn(session, user, state);
+    if (input_diag && XR_SUCCEEDED(result) && state) input_diag_current_profile(user, state->interactionProfile);
     if (layer_debug && active_instance) {  // which device each hand has, as the runtime reports it
         PFN_xrPathToString str = (PFN_xrPathToString)lookup(active_instance, "xrPathToString");
         char who[XR_MAX_PATH_LENGTH] = "?", what[XR_MAX_PATH_LENGTH] = "(none)";
@@ -1179,7 +1680,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrEnumerateInstanceExtensionProperties(const char
         XR_NULL_HANDLE, "xrEnumerateInstanceExtensionProperties");
     if (!fn) return XR_ERROR_INITIALIZATION_FAILED;
     if (!count) return XR_ERROR_VALIDATION_FAILURE;
-    if ((!foveation_fix && !passthrough_emul && !scene_emul && !controller_models) || layer)
+    if ((!foveation_fix && !hide_space_warp && !passthrough_emul && !scene_emul && !controller_models) || layer)
         return fn(layer, capacity, count, properties);
 
     uint32_t total = 0;
@@ -1196,6 +1697,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrEnumerateInstanceExtensionProperties(const char
         if (!strcmp(all[i].extensionName, "XR_FB_passthrough")) runtime_has_fb_passthrough = 1;
         if (!strcmp(all[i].extensionName, XR_FB_RENDER_MODEL_EXTENSION_NAME)) runtime_has_render_model = 1;
         if (foveation_fix && strstr(all[i].extensionName, "foveation")) continue;
+        if (hide_space_warp && !strcmp(all[i].extensionName, "XR_FB_space_warp")) continue;
         if (properties && kept < capacity) properties[kept] = all[i];
         ++kept;
     }
@@ -1263,6 +1765,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrGetInstanceProcAddr(XrInstance instance, const
     if (!emulated && emulate_scene && !strcmp(name, "xrLocateSpacesKHR")) emulated = (PFN_xrVoidFunction)emu_locate_spaces_khr;
     if (emulated) { *function = emulated; return XR_SUCCESS; }
     HOOK(xrGetSystemProperties)
+    HOOK(xrApplyHapticFeedback)
     HOOK(xrCreateReferenceSpace)
     HOOK(xrLocateViews)
     HOOK(xrPollEvent)
@@ -1278,6 +1781,7 @@ XRAPI_ATTR XrResult XRAPI_CALL xrGetInstanceProcAddr(XrInstance instance, const
     HOOK(xrCreateSwapchain)
     HOOK(xrDestroySwapchain)
     HOOK(xrEndFrame)
+    HOOK(xrBeginFrame)
     HOOK(xrLocateHandJointsEXT)
     HOOK(xrGetCurrentInteractionProfile)
     HOOK(xrEnumerateInstanceExtensionProperties)
@@ -1294,15 +1798,39 @@ XRAPI_ATTR XrResult XRAPI_CALL xrGetInstanceProcAddr(XrInstance instance, const
     }
     if (surface_emul) HOOK_AS(xrCreateSwapchainAndroidSurfaceKHR, hook_xrCreateSwapchainAndroidSurfaceKHR)
     if (eye_debug || release_wait) HOOK_AS(xrReleaseSwapchainImage, eye_hook_xrReleaseSwapchainImage)
-    if (sync_guard || layer_debug) HOOK_AS(xrSyncActions, hook_xrSyncActions)
+    if (layer_debug || cube_standin) {  // counters + cube stand-ins; every other wait/release hook above takes precedence
+        HOOK(xrWaitSwapchainImage)
+        HOOK(xrReleaseSwapchainImage)
+    }
+    if (cube_standin && (!strcmp(name, "xrUpdateSwapchainFB") || !strcmp(name, "xrGetSwapchainStateFB"))) {
+        XrResult result = next_gipa(instance, name, function);  // only wrapped where the runtime has it
+        if (XR_FAILED(result) || !*function) return result;
+        if (!strcmp(name, "xrUpdateSwapchainFB")) {
+            real_update_swapchain = (PFN_xrUpdateSwapchainFB)*function;
+            *function = (PFN_xrVoidFunction)standin_update_swapchain;
+        } else {
+            real_get_swapchain_state = (PFN_xrGetSwapchainStateFB)*function;
+            *function = (PFN_xrVoidFunction)standin_get_swapchain_state;
+        }
+        return result;
+    }
+    if (sync_guard || layer_debug || input_diag) HOOK_AS(xrSyncActions, hook_xrSyncActions)
     if (layer_debug) HOOK_AS(xrGetActionStateBoolean, hook_xrGetActionStateBoolean)
-    if (layer_debug || aim_correction_on() || profile_remap)
+    if (layer_debug || aim_correction_on() || profile_remap || input_diag || proximity_emul)
         HOOK_AS(xrSuggestInteractionProfileBindings, hook_xrSuggestInteractionProfileBindings)
+    if (proximity_emul) HOOK_AS(xrCreateAction, hook_xrCreateAction)
     if (layer_debug || aim_correction_on()) {
         HOOK_AS(xrCreateActionSpace, hook_xrCreateActionSpace)
     }
 #undef HOOK_AS
 #undef HOOK
+    if (input_diag) {  // logs only: wraps a few input/haptics/perf calls, notes lookups the runtime can't answer
+        PFN_xrVoidFunction diag = input_diag_hook(name);
+        XrResult result = next_gipa(instance, name, function);
+        input_diag_lookup(instance, name, result, *function);
+        if (diag && XR_SUCCEEDED(result) && *function) *function = diag;
+        return result;
+    }
     return next_gipa(instance, name, function);
 }
 

native/adapter/input_diag.c

@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// Included by frame_adapter.c (before session_fixes.c). input_diag: controller-input diagnostics, off by default and
+// hooked only when on; logs only, never changes what the game or the runtime sees. Each distinct line is logged once:
+//  * every interaction profile the game suggests bindings for, with the runtime's answer; a rejected profile lists
+//    all its binding paths ("unsupported: interaction profile ...");
+//  * the profile the runtime reports for each hand (xrGetCurrentInteractionProfile, before controller_fix rewrites
+//    the answer for the game): a game without a Steam Frame binding gets SteamVR's Touch remap, so this shows
+//    whether the game's input runs through it;
+//  * functions the game looks up that the runtime doesn't provide ("unsupported: function ...");
+//  * failing input, haptics and performance calls with the result name and the argument that failed.
+
+#define DIAG_MAX 512
+#define DIAG_KEY (2 * XR_MAX_PATH_LENGTH + 32)
+static uint64_t diag_seen[DIAG_MAX];  // FNV-1a hashes of the keys already logged
+static int diag_count;
+static pthread_mutex_t diag_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int diag_first(const char *key) {  // 1 the first time `key` is seen; 0 for everything after DIAG_MAX keys
+    uint64_t hash = 14695981039346656037ull;
+    for (const unsigned char *c = (const unsigned char *)key; *c; ++c) hash = (hash ^ *c) * 1099511628211ull;
+    pthread_mutex_lock(&diag_lock);
+    int first = 1;
+    for (int i = 0; i < diag_count && first; ++i) first = diag_seen[i] != hash;
+    if (first && diag_count < DIAG_MAX) diag_seen[diag_count++] = hash;
+    else if (first) {  // full: stop rather than repeat a per-frame failure
+        static int full;
+        if (!full) { full = 1; LOG("input_diag: %d distinct findings, logging no more", DIAG_MAX); }
+        first = 0;
+    }
+    pthread_mutex_unlock(&diag_lock);
+    return first;
+}
+
+static const char *diag_result_name(XrResult result, char *buf, size_t size) {
+    PFN_xrResultToString fn =
+        active_instance ? (PFN_xrResultToString)lookup(active_instance, "xrResultToString") : NULL;
+    char name[XR_MAX_RESULT_STRING_SIZE];
+    if (fn && XR_SUCCEEDED(fn(active_instance, result, name))) snprintf(buf, size, "%s", name);
+    else snprintf(buf, size, "%d", result);
+    return buf;
+}
+
+static void diag_call_failed(const char *fn, XrResult result, const char *detail) {
+    char key[DIAG_KEY], name[XR_MAX_RESULT_STRING_SIZE];
+    snprintf(key, sizeof(key), "%s:%d:%s", fn, result, detail ? detail : "");
+    if (diag_first(key))
+        LOG("input_diag: unsupported: %s -> %s%s%s", fn, diag_result_name(result, name, sizeof(name)),
+            detail ? " " : "", detail ? detail : "");
+}
+
+// Called by hook_xrSuggestInteractionProfileBindings with the runtime's answer to the game's own suggestion (before
+// profile_remap suggests it again for Touch).
+static void input_diag_suggested(XrInstance instance, const XrInteractionProfileSuggestedBinding *suggested,
+                                 XrResult result, PFN_xrPathToString to_string) {
+    if (!input_diag || !suggested || !to_string) return;
+    char profile[XR_MAX_PATH_LENGTH] = "?", key[DIAG_KEY], name[XR_MAX_RESULT_STRING_SIZE];
+    uint32_t size = 0;
+    to_string(instance, suggested->interactionProfile, sizeof(profile), &size, profile);
+    snprintf(key, sizeof(key), "suggest:%s:%d", profile, result);
+    if (!diag_first(key)) return;
+    if (XR_SUCCEEDED(result)) {
+        LOG("input_diag: bindings: %s accepted (%u paths)", profile, suggested->countSuggestedBindings);
+        return;
+    }
+    LOG("input_diag: unsupported: interaction profile %s -> %s (%u bindings):", profile,
+        diag_result_name(result, name, sizeof(name)), suggested->countSuggestedBindings);
+    for (uint32_t i = 0; i < suggested->countSuggestedBindings; ++i) {
+        char path[XR_MAX_PATH_LENGTH];
+        if (XR_SUCCEEDED(to_string(instance, suggested->suggestedBindings[i].binding, sizeof(path), &size, path)))
+            LOG("input_diag:   %s", path);
+    }
+}
+
+// Called by xrGetCurrentInteractionProfile with the runtime's answer.
+static void input_diag_current_profile(XrPath user, XrPath profile) {
+    PFN_xrPathToString to_string =
+        active_instance ? (PFN_xrPathToString)lookup(active_instance, "xrPathToString") : NULL;
+    if (!input_diag || !to_string) return;
+    char u[XR_MAX_PATH_LENGTH] = "?", p[XR_MAX_PATH_LENGTH] = "none", key[DIAG_KEY];
+    uint32_t size = 0;
+    to_string(active_instance, user, sizeof(u), &size, u);
+    if (profile) to_string(active_instance, profile, sizeof(p), &size, p);
+    snprintf(key, sizeof(key), "current:%s:%s", u, p);
+    if (diag_first(key)) LOG("input_diag: bindings: %s uses %s", u, p);
+}
+
+// ---------------------------------------------------------------- failing calls
+// xrSyncActions and xrSuggestInteractionProfileBindings are reported from session_fixes.c's hooks,
+// xrApplyHapticFeedback from frame_adapter.c's (always hooked for haptic_scale).
+#define DIAG_CHECKED(name, params, args, detail)                                                                    \
+    static XRAPI_ATTR XrResult XRAPI_CALL diag_##name params {                                                     \
+        PFN_##name fn = (PFN_##name)lookup(active_instance, #name);                                                \
+        if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;                                                             \
+        XrResult result = fn args;                                                                                 \
+        if (XR_FAILED(result)) diag_call_failed(#name, result, detail);                                            \
+        return result;                                                                                             \
+    }
+static const char *diag_name_detail(const char *name) {
+    static __thread char buf[XR_MAX_PATH_LENGTH + 8];
+    snprintf(buf, sizeof(buf), "(%s)", name ? name : "null");
+    return buf;
+}
+static const char *diag_perf_detail(XrPerfSettingsDomainEXT domain, XrPerfSettingsLevelEXT level) {
+    static __thread char buf[64];
+    snprintf(buf, sizeof(buf), "(domain %d level %d)", (int)domain, (int)level);
+    return buf;
+}
+DIAG_CHECKED(xrStringToPath, (XrInstance instance, const char *path, XrPath *out), (instance, path, out),
+             diag_name_detail(path))
+DIAG_CHECKED(xrCreateAction, (XrActionSet set, const XrActionCreateInfo *info, XrAction *action), (set, info, action),
+             diag_name_detail(info ? info->actionName : NULL))
+DIAG_CHECKED(xrAttachSessionActionSets, (XrSession session, const XrSessionActionSetsAttachInfo *info),
+             (session, info), NULL)
+DIAG_CHECKED(xrPerfSettingsSetPerformanceLevelEXT,
+             (XrSession session, XrPerfSettingsDomainEXT domain, XrPerfSettingsLevelEXT level),
+             (session, domain, level), diag_perf_detail(domain, level))
+#undef DIAG_CHECKED
+
+// xrGetInstanceProcAddr: our wrapper for `name`, NULL if it isn't one of ours.
+static PFN_xrVoidFunction input_diag_hook(const char *name) {
+#define DIAG(fn) if (!strcmp(name, #fn)) return (PFN_xrVoidFunction)diag_##fn;
+    DIAG(xrStringToPath)
+    DIAG(xrCreateAction)
+    DIAG(xrAttachSessionActionSets)
+    DIAG(xrPerfSettingsSetPerformanceLevelEXT)
+#undef DIAG
+    return NULL;
+}
+
+// After the runtime's own lookup: a function the game asked for that the runtime doesn't provide.
+static void input_diag_lookup(XrInstance instance, const char *name, XrResult result, PFN_xrVoidFunction fn) {
+    if (!input_diag || instance == XR_NULL_HANDLE || (XR_SUCCEEDED(result) && fn)) return;
+    char key[DIAG_KEY], rname[XR_MAX_RESULT_STRING_SIZE];
+    snprintf(key, sizeof(key), "fn:%s", name);
+    if (diag_first(key))
+        LOG("input_diag: unsupported: function %s not provided by the runtime (%s)", name,
+            diag_result_name(result, rname, sizeof(rname)));
+}

native/adapter/layer_emul_gl.c

@@ -304,6 +304,7 @@ static void emul_on_destroy_swapchain(XrSwapchain handle) {
 static XRAPI_ATTR XrResult XRAPI_CALL hook_xrReleaseSwapchainImage(XrSwapchain swapchain, const XrSwapchainImageReleaseInfo *info) {
     PFN_xrReleaseSwapchainImage fn = (PFN_xrReleaseSwapchainImage)lookup(active_instance, "xrReleaseSwapchainImage");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) return XR_SUCCESS;
     pthread_mutex_lock(&emul_lock);
     emul_source *s = emul_active() ? emul_find_source(swapchain, 0) : NULL;
     int index = s && s->acquired_count ? (int)s->acquired[0] : -1;
@@ -335,6 +336,7 @@ static XRAPI_ATTR XrResult XRAPI_CALL hook_xrReleaseSwapchainImage(XrSwapchain s
 static XRAPI_ATTR XrResult XRAPI_CALL hook_xrWaitSwapchainImage(XrSwapchain swapchain, const XrSwapchainImageWaitInfo *info) {
     PFN_xrWaitSwapchainImage fn = (PFN_xrWaitSwapchainImage)lookup(active_instance, "xrWaitSwapchainImage");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    if (is_standin(swapchain)) return XR_SUCCESS;
     XrResult result = emul_is_virtual(swapchain) ? XR_SUCCESS : fn(swapchain, info);
     pthread_mutex_lock(&emul_lock);
     emul_source *s = emul_active() ? emul_find_source(swapchain, 0) : NULL;

native/adapter/pose_time.c

@@ -0,0 +1,174 @@
+// Included by frame_adapter.c: the times games locate poses at (pose_time_fix, pose_debug).
+//
+// pose_debug (diagnostics): every ~5 s, per located space (xrLocateSpace/xrLocateSpaces) and for xrLocateViews, the
+// number of calls and the min/max of (requested time - the last xrWaitFrame's predictedDisplayTime); for
+// xrConvertTimespecTimeToTimeKHR the same for its answers, plus the spread of the XrTime-vs-CLOCK_MONOTONIC offset
+// measured at xrWaitFrame.
+
+static XrDuration last_display_period;
+
+#define PT_SLOTS 12
+typedef struct {
+    const char *kind;
+    uint64_t space, base;
+    int count;
+    long long min, max;  // ns relative to the last predicted display time
+} pt_stat;
+static pt_stat pt_stats[PT_SLOTS];
+static int pt_overflow;
+static long long pt_offset_min, pt_offset_max;
+static int pt_offset_count;
+static pthread_mutex_t pt_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static void pose_time_note(const char *kind, uint64_t space, uint64_t base, XrTime time) {
+    if (!pose_debug || !last_predicted_time) return;
+    long long d = (long long)(time - last_predicted_time);
+    pthread_mutex_lock(&pt_lock);
+    int i = 0;
+    while (i < PT_SLOTS && pt_stats[i].count &&
+           !(pt_stats[i].kind == kind && pt_stats[i].space == space && pt_stats[i].base == base))
+        ++i;
+    if (i == PT_SLOTS) {
+        ++pt_overflow;
+    } else {
+        pt_stat *s = &pt_stats[i];
+        if (!s->count) s->kind = kind, s->space = space, s->base = base, s->min = s->max = d;
+        if (d < s->min) s->min = d;
+        if (d > s->max) s->max = d;
+        ++s->count;
+    }
+    pthread_mutex_unlock(&pt_lock);
+}
+
+// The offset sampled at xrWaitFrame dips (by up to 2.5 s) whenever xrWaitFrame returns late after a hitch, which put
+// corrected times up to 2 s in the future (headless survey, 2026-10-09). The steady value is the largest recent sample:
+// pose_time_fix uses the maximum of the last PT_RING samples (~2 s at 72 Hz; the offset drifts only ~0.14 s per hour).
+#define PT_RING 144
+static int64_t pt_ring[PT_RING];
+static int pt_ring_n, pt_ring_i;
+
+static void pose_time_sample(int64_t offset) {  // XrTime "now" minus CLOCK_MONOTONIC, from xrWaitFrame
+    pthread_mutex_lock(&pt_lock);
+    pt_ring[pt_ring_i] = offset;
+    pt_ring_i = (pt_ring_i + 1) % PT_RING;
+    if (pt_ring_n < PT_RING) ++pt_ring_n;
+    pthread_mutex_unlock(&pt_lock);
+}
+
+// The last few predicted display times (xrWaitFrame): a pose asked for at one of them is the game rendering a frame
+// and is never moved. On a Frame whose XrTime runs only ~70 ms ahead of the monotonic clock (GitHub #49), such a
+// request could look nearer the monotonic "now" than XrTime's and was moved 68 ms into the future.
+#define PT_DISPLAY_RING 6
+#define PT_DISPLAY_MATCH 1000000ll  // 1 ms
+static XrTime pt_display[PT_DISPLAY_RING];
+static int pt_display_i;
+
+static void pose_time_display(XrTime predicted) {  // from xrWaitFrame
+    pthread_mutex_lock(&pt_lock);
+    pt_display[pt_display_i] = predicted;
+    pt_display_i = (pt_display_i + 1) % PT_DISPLAY_RING;
+    pthread_mutex_unlock(&pt_lock);
+}
+
+static int pose_time_is_display(XrTime time) {
+    int found = 0;
+    pthread_mutex_lock(&pt_lock);
+    for (int i = 0; i < PT_DISPLAY_RING && !found; i++) {
+        long long d = (long long)(time - pt_display[i]);
+        found = pt_display[i] && d <= PT_DISPLAY_MATCH && d >= -PT_DISPLAY_MATCH;
+    }
+    pthread_mutex_unlock(&pt_lock);
+    return found;
+}
+
+static int64_t pose_time_offset(void) {
+    pthread_mutex_lock(&pt_lock);
+    int64_t best = pt_ring_n ? pt_ring[0] : 0;
+    for (int i = 1; i < pt_ring_n; i++)
+        if (pt_ring[i] > best) best = pt_ring[i];
+    pthread_mutex_unlock(&pt_lock);
+    return best;
+}
+
+static void pose_time_note_offset(long long offset) {
+    if (!pose_debug) return;
+    pthread_mutex_lock(&pt_lock);
+    if (!pt_offset_count || offset < pt_offset_min) pt_offset_min = offset;
+    if (!pt_offset_count || offset > pt_offset_max) pt_offset_max = offset;
+    ++pt_offset_count;
+    pthread_mutex_unlock(&pt_lock);
+}
+
+// pose_time_fix: Meta's OVRPlugin takes "now" from CLOCK_MONOTONIC and passes it on as an XrTime unchanged (no
+// conversion reaches FrameBridge: OVRPort's dispatcher answers XR_KHR_convert_timespec_time itself, 1:1, since the
+// Frame's runtime lacks it). On a Quest XrTime is the monotonic clock; on the Frame it runs ahead (2.56 s measured on
+// SteamOS 0.4.5, 0.05-0.9 s seen on older builds), so every "now" pose (Unity's physics step, OVRInput's controller
+// poses) was located that far in the past and the hands trailed the controllers (BattleSisters, Sniper Elite VR).
+// A located time nearer the monotonic clock than XrTime's "now" is taken as a monotonic timestamp and moved to the
+// same moment in XrTime (offset measured at xrWaitFrame); a time more than PT_PAST_LIMIT before the predicted display
+// time that isn't one (BattleSisters asks for its head at XrTime 0.1 s; Robo Recall, Phantom, Vader, Time Stall and
+// The Room VR at ~0 every frame) is located at the predicted display time, the time the game renders with.
+// A monotonic timestamp is only told apart when the clocks are more than PT_MONO_PERIODS display periods apart, and the
+// time must be clearly nearer the monotonic "now" (at most a third of its distance to XrTime's "now"); a time equal to
+// a recent predicted display time is never moved (GitHub #49: XrTime only ~68 ms ahead, display-time requests moved).
+#define PT_PAST_LIMIT 500000000ll  // 0.5 s: no runtime keeps a longer pose history; real past queries are far shorter
+#define PT_MIN_OFFSET 5000000ll    // XrTime and the monotonic clock this close: nothing to tell apart or to fix
+#define PT_MONO_PERIODS 4
+#define PT_DEFAULT_PERIOD 13888889ll  // 72 Hz, before xrWaitFrame reported a period
+static int pt_fixed_mono, pt_fixed_past;
+static long long pt_fixed_min;
+
+static XrTime pose_time_fixed(XrTime time) {
+    if (!pose_time_fix || !last_predicted_time || pt_ring_n < 8) return time;  // a few frames of offset samples first
+    int64_t offset = pose_time_offset();  // XrTime "now" minus the monotonic clock (robust, see above)
+    if (offset < PT_MIN_OFFSET && offset > -PT_MIN_OFFSET) return time;
+    if (pose_time_is_display(time)) return time;  // the frame (or a recent one) the game renders
+    long long period = last_display_period > 0 ? (long long)last_display_period : PT_DEFAULT_PERIOD;
+    long long abs_offset = offset < 0 ? -offset : offset;
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    long long mono = (long long)ts.tv_sec * 1000000000ll + ts.tv_nsec;
+    long long d_mono = (long long)time - mono, d_xr = (long long)time - (mono + offset);
+    long long abs_mono = d_mono < 0 ? -d_mono : d_mono, abs_xr = d_xr < 0 ? -d_xr : d_xr;
+    XrTime fixed;
+    int kind;
+    if (abs_offset > PT_MONO_PERIODS * period && abs_mono < PT_PAST_LIMIT && 3 * abs_mono < abs_xr) {
+        fixed = (XrTime)(time + offset), kind = 0;  // a monotonic timestamp
+    } else if ((long long)(time - last_predicted_time) < -PT_PAST_LIMIT) {
+        fixed = last_predicted_time, kind = 1;  // far in the past: the frame's display time
+    } else {
+        return time;
+    }
+    if (pose_debug) {
+        long long d = (long long)(time - last_predicted_time);
+        pthread_mutex_lock(&pt_lock);
+        if (!(pt_fixed_mono + pt_fixed_past) || d < pt_fixed_min) pt_fixed_min = d;
+        ++*(kind ? &pt_fixed_past : &pt_fixed_mono);
+        pthread_mutex_unlock(&pt_lock);
+    }
+    static int logged[2];
+    if (logged[kind]++ < 3)
+        LOG("pose_time_fix: pose asked for at %.1f ms from the predicted display time (%s) located at %.1f ms",
+            (long long)(time - last_predicted_time) / 1e6, kind ? "far in the past" : "a monotonic-clock time",
+            (long long)(fixed - last_predicted_time) / 1e6);
+    return fixed;
+}
+
+// called from the pacing statistics in xrEndFrame
+static void pose_time_report(void) {
+    if (!pose_debug) return;
+    pthread_mutex_lock(&pt_lock);
+    LOG("pose_debug: period %.2f ms; XrTime - monotonic at xrWaitFrame (%d): %.2f..%.2f ms", last_display_period / 1e6,
+        pt_offset_count, pt_offset_min / 1e6, pt_offset_max / 1e6);
+    for (int i = 0; i < PT_SLOTS && pt_stats[i].count; ++i)
+        LOG("pose_debug: %s space=0x%llx base=0x%llx: %d calls, time - predicted display time %.2f..%.2f ms",
+            pt_stats[i].kind, (unsigned long long)pt_stats[i].space, (unsigned long long)pt_stats[i].base,
+            pt_stats[i].count, pt_stats[i].min / 1e6, pt_stats[i].max / 1e6);
+    if (pt_overflow) LOG("pose_debug: %d calls not counted (more than %d spaces)", pt_overflow, PT_SLOTS);
+    if (pt_fixed_mono + pt_fixed_past)
+        LOG("pose_debug: pose_time_fix moved %d monotonic-clock times and %d far-past times (earliest asked %.2f ms)",
+            pt_fixed_mono, pt_fixed_past, pt_fixed_min / 1e6);
+    memset(pt_stats, 0, sizeof(pt_stats));
+    pt_overflow = pt_offset_count = pt_fixed_mono = pt_fixed_past = 0;
+    pthread_mutex_unlock(&pt_lock);
+}

native/adapter/session_fixes.c

@@ -110,11 +110,12 @@ static int input_syncs, input_sync_ok, input_bool_reads, input_bool_true, input_
 static XRAPI_ATTR XrResult XRAPI_CALL hook_xrSyncActions(XrSession session, const XrActionsSyncInfo *info) {
     PFN_xrSyncActions fn = (PFN_xrSyncActions)lookup(active_instance, "xrSyncActions");
     if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
-    if (!sync_guard) {  // installed for layer_debug only: count
+    if (!sync_guard) {  // installed for layer_debug / input_diag only: count, report failures
         XrResult r = fn(session, info);
         __atomic_add_fetch(&input_syncs, 1, __ATOMIC_RELAXED);
         if (r == XR_SUCCESS) __atomic_add_fetch(&input_sync_ok, 1, __ATOMIC_RELAXED);
         input_last_sync_result = r;
+        if (input_diag && XR_FAILED(r)) diag_call_failed("xrSyncActions", r, NULL);
         return r;
     }
     pthread_mutex_lock(&sync_lock);
@@ -123,6 +124,7 @@ static XRAPI_ATTR XrResult XRAPI_CALL hook_xrSyncActions(XrSession session, cons
     pthread_mutex_unlock(&sync_lock);
     static int logged;
     if (wait > 0 && logged++ < 5) LOG("sync_guard: input paused for %.0f ms after focus returned", wait / 1e6);
+    if (input_diag && XR_FAILED(r)) diag_call_failed("xrSyncActions", r, NULL);
     return r;
 }
 
@@ -140,7 +142,7 @@ static XRAPI_ATTR XrResult XRAPI_CALL hook_xrGetActionStateBoolean(XrSession ses
 // ---------------------------------------------------------------- focus_hold
 #define FOCUS_HOLD_MIN_FOCUSED_NS 1000000000ll  // only after this long in FOCUSED (start-up transitions untouched;
                                                 // 3 s let a 27 ms dip through in Blade & Sorcery)
-// dips longer than focus_hold_ms (setting, default 1000) are delivered (late, in order): taking the headset off or the
+// dips longer than focus_hold_ms (setting, default 5000) are delivered (late, in order): taking the headset off or the
 // system menu must still pause the game. A longer limit is for headsets whose wear sensor flickers ("HMD off" for
 // 0.5-2 s while worn; Blade & Sorcery pauses on each)
 #define FOCUS_HOLD_MAX_DIP_NS ((int64_t)(focus_hold_ms * 1000000.0f))
@@ -283,6 +285,90 @@ static int touch_has(const char *path) {
     return 0;
 }
 
+// ---------------------------------------------------------------- finger proximity from touch (proximity_emul)
+// Meta's OVRPlugin reports a thumb or index finger resting near the controller through XR_FB_touch_controller_proximity
+// (.../thumb_fb/proximity_fb, .../trigger/proximity_fb). The Frame's runtime doesn't have it; OVRPort's loader offers
+// it to the game anyway, and the proximity actions never get a working binding: "near" stays false, so games that
+// animate the hands from it show a thumb that never moves (Unreal's ThumbUp axis is "no thumb proximity", e.g. Vader
+// Immortal; found by Klownicle, GitHub #49). With proximity_emul those actions are bound to the capacitive touch inputs
+// instead (OpenXR combines several bindings of one boolean action with OR): thumb = thumbstick, face buttons or thumb
+// rest touched; index (proximity_emul=2) = trigger touched. Only when the runtime lacks the extension itself.
+static XrAction thumb_proximity_action, trigger_proximity_action;
+
+static XRAPI_ATTR XrResult XRAPI_CALL hook_xrCreateAction(XrActionSet set, const XrActionCreateInfo *info,
+        XrAction *action) {
+    PFN_xrCreateAction fn = (PFN_xrCreateAction)lookup(active_instance, "xrCreateAction");
+    if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    XrResult r = fn(set, info, action);
+    if (XR_SUCCEEDED(r) && info && action) {  // OVRPlugin's action names
+        if (!strcmp(info->actionName, "hand_thumb_proximity")) thumb_proximity_action = *action;
+        else if (!strcmp(info->actionName, "hand_trigger_proximity")) trigger_proximity_action = *action;
+        else return r;
+        LOG("proximity_emul: game action %s found", info->actionName);
+    }
+    return r;
+}
+
+static const char *const THUMB_TOUCH_LEFT[] = {"x/touch", "y/touch", "thumbstick/touch", "thumbrest/touch"};
+static const char *const THUMB_TOUCH_RIGHT[] = {"a/touch", "b/touch", "thumbstick/touch", "thumbrest/touch"};
+
+static int add_binding(XrInstance instance, PFN_xrStringToPath to_path, XrActionSuggestedBinding *b, uint32_t *n,
+                       XrAction action, const char *hand, const char *input) {
+    char path[XR_MAX_PATH_LENGTH];
+    snprintf(path, sizeof(path), "/user/hand/%s/input/%s", hand, input);
+    XrPath p;
+    if (XR_FAILED(to_path(instance, path, &p))) return 0;
+    for (uint32_t i = 0; i < *n; ++i)
+        if (b[i].action == action && b[i].binding == p) return 0;
+    b[*n].action = action;
+    b[(*n)++].binding = p;
+    return 1;
+}
+
+// Suggests Touch bindings with finger proximity bound to the touch inputs (proximity_emul), falling back to the
+// bindings as given when the runtime refuses them.
+static XrResult suggest_touch(XrInstance instance, PFN_xrSuggestInteractionProfileBindings fn,
+                              PFN_xrPathToString to_string, const XrInteractionProfileSuggestedBinding *suggested) {
+    PFN_xrStringToPath to_path = (PFN_xrStringToPath)lookup(instance, "xrStringToPath");
+    if (!proximity_emul || runtime_has_proximity || !to_path || !to_string) return fn(instance, suggested);
+    XrAction thumb = thumb_proximity_action, index = proximity_emul > 1 ? trigger_proximity_action : XR_NULL_HANDLE;
+    uint32_t n = suggested->countSuggestedBindings, kept = 0, dropped = 0, added = 0;
+    XrActionSuggestedBinding *b = calloc(n + 2 * 5, sizeof(*b));
+    if (!b) return fn(instance, suggested);
+    for (uint32_t i = 0; i < n; ++i) {
+        char path[XR_MAX_PATH_LENGTH];
+        uint32_t size = 0;
+        const XrActionSuggestedBinding *s = &suggested->suggestedBindings[i];
+        if (XR_SUCCEEDED(to_string(instance, s->binding, sizeof(path), &size, path)) && strstr(path, "/proximity_")) {
+            // the game's own proximity binding, which the runtime doesn't know: its action is bound to touch below
+            if (strstr(path, "/thumb")) { if (!thumb) thumb = s->action; }
+            else if (proximity_emul > 1 && !index) index = s->action;
+            ++dropped;
+            continue;
+        }
+        b[kept++] = *s;
+    }
+    for (int hand = 0; hand < 2; ++hand) {
+        const char *name = hand ? "right" : "left";
+        const char *const *thumb_inputs = hand ? THUMB_TOUCH_RIGHT : THUMB_TOUCH_LEFT;
+        for (int c = 0; thumb && c < 4; ++c) added += add_binding(instance, to_path, b, &kept, thumb, name, thumb_inputs[c]);
+        if (index) added += add_binding(instance, to_path, b, &kept, index, name, "trigger/touch");
+    }
+    XrResult r;
+    if (!added && !dropped) r = fn(instance, suggested);
+    else {
+        XrInteractionProfileSuggestedBinding copy = *suggested;
+        copy.countSuggestedBindings = kept;
+        copy.suggestedBindings = b;
+        r = fn(instance, &copy);
+        LOG("proximity_emul: finger proximity bound to touch (%u binding(s) added, %u proximity path(s) replaced): %d",
+            added, dropped, r);
+        if (XR_FAILED(r)) r = fn(instance, suggested);
+    }
+    free(b);
+    return r;
+}
+
 static XrResult remap_to_touch(XrInstance instance, PFN_xrSuggestInteractionProfileBindings fn,
                                PFN_xrPathToString to_string, const XrInteractionProfileSuggestedBinding *suggested,
                                const char *profile) {
@@ -303,7 +389,7 @@ static XrResult remap_to_touch(XrInstance instance, PFN_xrSuggestInteractionProf
     copy.interactionProfile = touch;
     copy.countSuggestedBindings = kept;
     copy.suggestedBindings = b;
-    XrResult r = kept ? fn(instance, &copy) : XR_ERROR_PATH_UNSUPPORTED;
+    XrResult r = kept ? suggest_touch(instance, fn, to_string, &copy) : XR_ERROR_PATH_UNSUPPORTED;
     free(b);
     LOG("controller profile %s -> oculus/touch_controller (%u bindings, %u dropped): %d", profile + 22, kept,
         n - kept, r);
@@ -323,11 +409,14 @@ static XRAPI_ATTR XrResult XRAPI_CALL hook_xrSuggestInteractionProfileBindings(X
             if (XR_SUCCEEDED(to_string(instance, suggested->suggestedBindings[i].binding, sizeof(path), &size, path)))
                 note_pose_binding(suggested->suggestedBindings[i].action, path);
         }
-    XrResult r = fn(instance, suggested);
-    if (!profile_remap || !suggested || !to_string) return r;
     char profile[XR_MAX_PATH_LENGTH] = {0};
     uint32_t size = 0;
-    if (XR_FAILED(to_string(instance, suggested->interactionProfile, sizeof(profile), &size, profile))) return r;
+    int known = suggested && to_string &&
+                XR_SUCCEEDED(to_string(instance, suggested->interactionProfile, sizeof(profile), &size, profile));
+    XrResult r = known && !strcmp(profile, TOUCH_PROFILE) ? suggest_touch(instance, fn, to_string, suggested)
+                                                         : fn(instance, suggested);
+    input_diag_suggested(instance, suggested, r, to_string);  // the runtime's answer to the game's own suggestion
+    if (!profile_remap || !known) return r;
     if (!strcmp(profile, TOUCH_PROFILE)) {
         if (XR_SUCCEEDED(r)) app_suggested_touch = 1;  // the app's own Touch bindings win over a remap
         return r;

native/adapter/snapshot_gl.c

@@ -0,0 +1,173 @@
+// FramePort FrameBridge: eye-image snapshots for headless diagnostics (setting snapshot=<seconds>, GLES games only).
+// Every <seconds>, at xrEndFrame, the left-eye image the game just submitted (projection layer, view 0: its swapchain
+// image and array layer) is read back on the game's own GL context and written at a quarter of its size as
+// /sdcard/Android/data/<package>/files/fb_snap_<n>.ppm (n = 0-7, the oldest is overwritten). Nobody wears the headset
+// in a launch test, so the headset view stays black: this shows what the game itself draws (e.g. which screen it is
+// stuck on). The game's framebuffer, pack-buffer and pack-alignment bindings are restored afterwards.
+#define SNAP_MAX_SWAPCHAINS 16
+#define SNAP_MAX_IMAGES 8
+#define SNAP_SCALE 4
+
+
+#define SNAP_GL_FUNCS(X) X(glGenFramebuffers) X(glDeleteFramebuffers) X(glBindFramebuffer) X(glFramebufferTexture2D) \
+    X(glFramebufferTextureLayer) X(glCheckFramebufferStatus) X(glReadPixels) X(glGetIntegerv) X(glPixelStorei) \
+    X(glBindBuffer) X(glGetError)
+#define SNAP_DECLARE(fn) static __typeof__(&fn) s_##fn;
+SNAP_GL_FUNCS(SNAP_DECLARE)
+#undef SNAP_DECLARE
+static EGLContext (*s_eglGetCurrentContext)(void);
+
+static struct {
+    XrSwapchain handle;
+    uint32_t width, height, array_size, count, last_acquired;
+    GLuint images[SNAP_MAX_IMAGES];
+} snap_chains[SNAP_MAX_SWAPCHAINS];
+static pthread_mutex_t snap_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int snap_load_gl(void) {
+    static int state;  // 0 untried, 1 ok, -1 failed
+    if (state) return state > 0;
+    void *egl = dlopen("libEGL.so", RTLD_NOW | RTLD_LOCAL), *gles = dlopen("libGLESv3.so", RTLD_NOW | RTLD_LOCAL);
+    int ok = egl && gles;
+    if (ok) s_eglGetCurrentContext = (EGLContext (*)(void))dlsym(egl, "eglGetCurrentContext");
+#define SNAP_RESOLVE(fn) ok &= gles && (s_##fn = (__typeof__(s_##fn))dlsym(gles, #fn)) != NULL;
+    SNAP_GL_FUNCS(SNAP_RESOLVE)
+#undef SNAP_RESOLVE
+    state = ok && s_eglGetCurrentContext ? 1 : -1;
+    if (state < 0) LOG("snapshot: OpenGL ES not available, no snapshots");
+    return state > 0;
+}
+
+static int snap_find(XrSwapchain handle, int create) {
+    for (int i = 0; i < SNAP_MAX_SWAPCHAINS; ++i)
+        if (snap_chains[i].handle == handle) return i;
+    if (!create) return -1;
+    for (int i = 0; i < SNAP_MAX_SWAPCHAINS; ++i)
+        if (!snap_chains[i].handle) { snap_chains[i].handle = handle; snap_chains[i].count = 0; return i; }
+    return -1;
+}
+
+static void snap_on_create(XrSwapchain handle, const XrSwapchainCreateInfo *info) {
+    if (!snapshot || !info) return;
+    pthread_mutex_lock(&snap_lock);
+    int i = snap_find(handle, 1);
+    if (i >= 0) {
+        snap_chains[i].width = info->width;
+        snap_chains[i].height = info->height;
+        snap_chains[i].array_size = info->arraySize ? info->arraySize : 1;
+    }
+    pthread_mutex_unlock(&snap_lock);
+}
+
+static void snap_on_destroy(XrSwapchain handle) {
+    if (!snapshot) return;
+    pthread_mutex_lock(&snap_lock);
+    int i = snap_find(handle, 0);
+    if (i >= 0) snap_chains[i].handle = XR_NULL_HANDLE;
+    pthread_mutex_unlock(&snap_lock);
+}
+
+static void snap_on_enumerate(XrSwapchain handle, uint32_t count, const XrSwapchainImageBaseHeader *images) {
+    if (!snapshot || !images || !count || images->type != (XrStructureType)1000024002) return;  // OPENGL_ES_KHR
+    pthread_mutex_lock(&snap_lock);
+    int i = snap_find(handle, 1);
+    if (i >= 0) {
+        uint32_t n = count < SNAP_MAX_IMAGES ? count : SNAP_MAX_IMAGES;
+        const emul_gles_image *gl = (const emul_gles_image *)images;
+        for (uint32_t k = 0; k < n; ++k) snap_chains[i].images[k] = gl[k].image;
+        snap_chains[i].count = n;
+    }
+    pthread_mutex_unlock(&snap_lock);
+}
+
+static void snap_on_acquire(XrSwapchain handle, uint32_t index) {
+    if (!snapshot) return;
+    pthread_mutex_lock(&snap_lock);
+    int i = snap_find(handle, 0);
+    if (i >= 0) snap_chains[i].last_acquired = index;
+    pthread_mutex_unlock(&snap_lock);
+}
+
+static void snap_write(const unsigned char *rgba, uint32_t w, uint32_t h, int n) {
+    char path[320];
+    snprintf(path, sizeof(path), "%s/fb_snap_%d.ppm", snap_dir, n);
+    FILE *f = fopen(path, "wb");
+    if (!f) { LOG("snapshot: can't write %s", path); return; }
+    uint32_t ow = w / SNAP_SCALE, oh = h / SNAP_SCALE;
+    fprintf(f, "P6\n%u %u\n255\n", ow, oh);
+    unsigned char *row = malloc((size_t)ow * 3);
+    for (uint32_t y = 0; row && y < oh; ++y) {
+        const unsigned char *src = rgba + (size_t)(h - 1 - y * SNAP_SCALE) * w * 4;  // GL rows are bottom-up
+        for (uint32_t x = 0; x < ow; ++x) {
+            const unsigned char *p = src + (size_t)x * SNAP_SCALE * 4;
+            row[x * 3] = p[0], row[x * 3 + 1] = p[1], row[x * 3 + 2] = p[2];
+        }
+        fwrite(row, 1, (size_t)ow * 3, f);
+    }
+    free(row);
+    fclose(f);
+    LOG("snapshot: %s (%ux%u)", path, ow, oh);
+}
+
+static void snap_end_frame(const XrFrameEndInfo *info) {
+    if (!snapshot || !*snap_dir || !info) return;
+    static int64_t next_ns;
+    static int taken;
+    struct timespec now;
+    clock_gettime(CLOCK_MONOTONIC, &now);
+    int64_t t = (int64_t)now.tv_sec * 1000000000ll + now.tv_nsec;
+    if (t < next_ns) return;
+    next_ns = t + (int64_t)snapshot * 1000000000ll;
+    const XrCompositionLayerProjection *proj = NULL;
+    for (uint32_t i = 0; i < info->layerCount && !proj; ++i)
+        if (info->layers[i] && info->layers[i]->type == XR_TYPE_COMPOSITION_LAYER_PROJECTION &&
+            ((const XrCompositionLayerProjection *)info->layers[i])->viewCount)
+            proj = (const XrCompositionLayerProjection *)info->layers[i];
+    if (!proj || !snap_load_gl()) return;
+    if (!s_eglGetCurrentContext()) {
+        static int logged;
+        if (!logged++) LOG("snapshot: no GL context current in xrEndFrame, no snapshot");
+        return;
+    }
+    const XrSwapchainSubImage *sub = &proj->views[0].subImage;
+    pthread_mutex_lock(&snap_lock);
+    int i = snap_find(sub->swapchain, 0);
+    GLuint tex = 0;
+    uint32_t w = 0, h = 0, array_size = 1;
+    if (i >= 0 && snap_chains[i].count && snap_chains[i].last_acquired < snap_chains[i].count) {
+        tex = snap_chains[i].images[snap_chains[i].last_acquired];
+        w = snap_chains[i].width, h = snap_chains[i].height, array_size = snap_chains[i].array_size;
+    }
+    pthread_mutex_unlock(&snap_lock);
+    if (!tex || !w || !h) return;
+    GLint read_fb = 0, pack_buffer = 0, pack_alignment = 4;
+    s_glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_fb);
+    s_glGetIntegerv(GL_PIXEL_PACK_BUFFER_BINDING, &pack_buffer);
+    s_glGetIntegerv(GL_PACK_ALIGNMENT, &pack_alignment);
+    GLuint fb = 0;
+    s_glGenFramebuffers(1, &fb);
+    s_glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
+    if (array_size > 1)
+        s_glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex, 0, (GLint)sub->imageArrayIndex);
+    else
+        s_glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
+    unsigned char *rgba = NULL;
+    if (s_glCheckFramebufferStatus(GL_READ_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE &&
+        (rgba = malloc((size_t)w * h * 4))) {
+        s_glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+        s_glPixelStorei(GL_PACK_ALIGNMENT, 1);
+        s_glReadPixels(0, 0, (GLsizei)w, (GLsizei)h, GL_RGBA, GL_UNSIGNED_BYTE, rgba);
+    } else {
+        static int logged;
+        if (logged++ < 3) LOG("snapshot: eye image %u not readable (framebuffer incomplete)", tex);
+    }
+    s_glPixelStorei(GL_PACK_ALIGNMENT, pack_alignment);
+    s_glBindBuffer(GL_PIXEL_PACK_BUFFER, (GLuint)pack_buffer);
+    s_glBindFramebuffer(GL_READ_FRAMEBUFFER, (GLuint)read_fb);
+    s_glDeleteFramebuffers(1, &fb);
+    while (s_glGetError() != GL_NO_ERROR) {}  // our calls must not leave errors for the game to find
+    if (rgba) {
+        snap_write(rgba, w, h, taken++ % 8);
+        free(rgba);
+    }
+}

native/build.py

@@ -5,12 +5,12 @@ Everything is fetched on demand into native/.cache (git-ignored):
   - Android NDK r27c (27.2.12479018) from Google's repository (checksummed via repository2-3.xml)
   - OpenXR headers at the commits each component was written against (KhronosGroup/OpenXR-SDK)
   - Temurin JDK 21 (javac) and Android build-tools (d8) for the Java stub classes
-Then builds: FrameBridge adapter (arm64 + arm32), VrApi bridge, platform compat, language packs, GL shim, oculusos stub dex, the
+Then builds: FrameBridge adapter (arm64 + arm32), VrApi bridge, platform compat, language packs, GL shim, multiview twin interposer (glmv), oculusos stub dex, the
 timefix OpenXR layer for Proton games (linux-arm64, glibc; the NDK's clang builds it freestanding), the
-OculusHMDConnected helper for Rift games under Proton (win-x64 PE; the NDK's clang + lld-link, no Windows SDK), and
-rewrites artifacts/SHA256SUMS. Run `frameport parity` afterwards to see which games change.
+OculusHMDConnected helper for Rift games under Proton (win-x64 PE; the NDK's clang + lld-link, no Windows SDK), the
+live view's hardware H.264 encoder fp_venc (linux-arm64-bin, static freestanding executable), and rewrites artifacts/SHA256SUMS. Run `frameport parity` afterwards to see which games change.
 
-    python native/build.py [--only adapter,bridge,compat,langpack,glshim,dex,xrlayer,oculushmd,xrshim,vkshim,ovrpshim,vrsettings] [--ndk PATH]
+    python native/build.py [--only adapter,bridge,compat,langpack,glshim,eglfmt,glmv,ovrtrace,dex,xrlayer,oculushmd,xrshim,vkshim,zinkfix,ovrpshim,vrsettings,venc] [--ndk PATH]
 """
 from __future__ import annotations
 
@@ -158,6 +158,32 @@ def build_xrlayer(tc: Path):
     shutil.copy(src / "XR_APILAYER_FRAMEPORT_timefix.json", out / "XR_APILAYER_FRAMEPORT_timefix.json")
 
 
+def uapi_arm64(tc: Path) -> Path:
+    """Only the kernel UAPI headers of the NDK sysroot (linux/, asm-generic/, drm/, aarch64 asm/), rebuilt every time,
+    so no bionic libc header can end up on a freestanding build's include path."""
+    inc = tc / "sysroot/usr/include"
+    dest = CACHE / "uapi-arm64"
+    shutil.rmtree(dest, ignore_errors=True)
+    for d in ("linux", "asm-generic", "drm"):
+        shutil.copytree(inc / d, dest / d)
+    shutil.copytree(inc / "aarch64-linux-android/asm", dest / "asm")
+    return dest
+
+
+def build_venc(tc: Path):
+    """fp_venc (Linux aarch64, runs on the Frame): SteamVR headset view -> V4L2 hardware H.264 encoder -> stdout, for the
+    live view. Fully static and freestanding (raw syscalls, own _start), so it needs no libc at build or run time.
+    Goes to linux-arm64-bin/, not linux-arm64/ (that folder is uploaded whole as the OpenXR layer)."""
+    src = HERE / "venc"
+    uapi = uapi_arm64(tc)
+    out = ART / "linux-arm64-bin"
+    out.mkdir(parents=True, exist_ok=True)
+    run([tc / "bin/clang", "--target=aarch64-linux-gnu", "-ffreestanding", "-nostdlib", "-nostdlibinc", "-static",
+         "-fno-stack-protector", "-fno-builtin", "-O2", "-Wall", "-Wextra", "-Werror", "-fuse-ld=lld",
+         "-Wl,--build-id=none", "-Wl,-z,max-page-size=65536", "-e", "_start", "-I", src / "include", "-I", uapi,
+         f"-ffile-prefix-map={HERE}=native", "fp_venc.c", "convert.c", "sys.c", "-o", out / "fp_venc"], cwd=src)
+
+
 OCULUSHMD_IMPORTS = ("CreateEventW", "CreateJobObjectW", "AssignProcessToJobObject", "QueryInformationJobObject",
                      "CreateProcessW", "ResumeThread", "WaitForSingleObject", "GetExitCodeProcess", "CloseHandle",
                      "Sleep", "GetCommandLineW", "GetLastError", "GetStdHandle", "WriteFile", "ExitProcess")
@@ -239,6 +265,35 @@ def build_glshim(tc: Path):
          "-Wl,-z,max-page-size=16384", "glshim.c", "-ldl", "-llog", "-o", ART / "arm64-v8a/libglshim.so"], cwd=src)
 
 
+def build_eglfmt(tc: Path):
+    """Depth-format shim (see glshim/eglfmt.c) that GL-to-GLES wrappers (QuestCraft's LTW) load in place of libEGL.so.
+    Named libfpg.so: no longer than "libEGL.so", whose dlopen string in the wrapper is rewritten in place. Linked to
+    libEGL so a dlsym on its handle still finds every EGL function."""
+    src = HERE / "glshim"
+    run([exe(tc, "aarch64-linux-android29-clang"), "-shared", "-fPIC", "-O2", "-Wall", "-Wextra", "-Werror",
+         "-fvisibility=hidden", "-Wl,-soname,libfpg.so", "-Wl,-z,max-page-size=16384", "eglfmt.c",
+         "-Wl,--no-as-needed", "-lEGL", "-Wl,--as-needed", "-ldl", "-llog", "-o", ART / "arm64-v8a/libfpg.so"], cwd=src)
+
+
+def build_glmv(tc: Path):
+    """Single-view draws of OVR_multiview programs (see glmv/glmv.c, frame.gl_multiview_fbo). Named libfpglmv.so: as
+    long as "libGLESv3.so", whose dlopen string in the engine is rewritten in place. Linked to libGLESv3 so a dlsym on
+    its handle still finds every GL function it doesn't wrap."""
+    src = HERE / "glmv"
+    run([exe(tc, "aarch64-linux-android29-clang"), "-shared", "-fPIC", "-O2", "-Wall", "-Wextra", "-Werror",
+         "-fvisibility=hidden", f"-ffile-prefix-map={src}=native/glmv", "-Wl,-soname,libfpglmv.so",
+         "-Wl,-z,max-page-size=16384", "glmv.c", "-Wl,--no-as-needed", "-lGLESv3", "-Wl,--as-needed", "-lEGL", "-ldl",
+         "-llog", "-o", ART / "arm64-v8a/libfpglmv.so"], cwd=src)
+
+
+def build_ovrtrace(tc: Path):
+    """Meta Platform SDK tracer (see ovrtrace/ovrtrace.c): diagnostics, the game's engine library loads it first."""
+    src = HERE / "ovrtrace"
+    run([exe(tc, "aarch64-linux-android29-clang"), "-shared", "-fPIC", "-O2", "-Wall", "-Wextra", "-Werror",
+         "-Wl,-soname,libfp_ovrtrace.so", "-Wl,-z,max-page-size=16384", "ovrtrace.c", "-ldl", "-llog",
+         "-o", ART / "arm64-v8a/libfp_ovrtrace.so"], cwd=src)
+
+
 def build_xrshim(tc: Path):
     """FrameBridge extension shim (see xrshim/xrshim.c): DT_NEEDED-injected in front of overport's libopenxr_loader.so."""
     src = HERE / "xrshim"
@@ -256,6 +311,14 @@ def build_vkshim(tc: Path):
         cwd=src)
 
 
+def build_zinkfix(tc: Path):
+    """Shader-fix Vulkan layer for OpenGL ES games (see zinkfix/zinkfix.c): between Zink and the driver."""
+    src = HERE / "zinkfix"
+    run([exe(tc, "aarch64-linux-android29-clang"), "-shared", "-fPIC", "-O2", "-Wall", "-Wextra", "-Werror",
+         "-fvisibility=hidden", "-Wl,-soname,libVkLayer_fp_shaderfix.so", "-Wl,-z,max-page-size=16384", "zinkfix.c",
+         "-ldl", "-llog", "-o", ART / "arm64-v8a/libVkLayer_fp_shaderfix.so"], cwd=src)
+
+
 def build_ovrpshim(tc: Path):
     """OVRPlugin frame-loop shim (see ovrpshim/ovrpshim.c) for Unity 2017-2018 built-in Oculus support."""
     src = HERE / "ovrpshim"
@@ -308,7 +371,7 @@ def write_sums():
 
 def main():
     ap = argparse.ArgumentParser()
-    ap.add_argument("--only", default="adapter,bridge,compat,langpack,glshim,dex,xrlayer,oculushmd,xrshim,vkshim,ovrpshim,vrsettings")
+    ap.add_argument("--only", default="adapter,bridge,compat,langpack,glshim,eglfmt,glmv,ovrtrace,dex,xrlayer,oculushmd,xrshim,vkshim,zinkfix,ovrpshim,vrsettings,venc")
     ap.add_argument("--ndk")
     args = ap.parse_args()
     parts = set(args.only.split(","))
@@ -317,11 +380,12 @@ def main():
     tc = clang_dir(ndk(args.ndk)) if parts - {"dex"} else None
     steps = {"adapter": lambda: build_adapter(tc), "bridge": lambda: build_bridge(tc), "compat": lambda: build_compat(tc),
              "langpack": lambda: build_langpack(tc),
-             "glshim": lambda: build_glshim(tc), "xrshim": lambda: build_xrshim(tc), "dex": build_dex, "xrlayer": lambda: build_xrlayer(tc),
+             "glshim": lambda: build_glshim(tc), "eglfmt": lambda: build_eglfmt(tc), "glmv": lambda: build_glmv(tc), "ovrtrace": lambda: build_ovrtrace(tc), "xrshim": lambda: build_xrshim(tc), "dex": build_dex, "xrlayer": lambda: build_xrlayer(tc),
              "oculushmd": lambda: build_oculushmd(tc), "vkshim": lambda: build_vkshim(tc),
+             "zinkfix": lambda: build_zinkfix(tc),
              "ovrpshim": lambda: build_ovrpshim(tc),
-             "vrsettings": lambda: build_vrsettings(tc)}
-    for name in ("adapter", "bridge", "compat", "langpack", "glshim", "xrshim", "vkshim", "ovrpshim", "dex", "xrlayer", "oculushmd", "vrsettings"):
+             "vrsettings": lambda: build_vrsettings(tc), "venc": lambda: build_venc(tc)}
+    for name in ("adapter", "bridge", "compat", "langpack", "glshim", "eglfmt", "glmv", "ovrtrace", "xrshim", "vkshim", "zinkfix", "ovrpshim", "dex", "xrlayer", "oculushmd", "vrsettings", "venc"):
         if name in parts:
             log(f"build {name}")
             steps[name]()

native/glmv/glmv.c

@@ -0,0 +1,704 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// libfpglmv.so: single-view draws of OVR_multiview programs (frame.gl_multiview_fbo, GitHub #77).
+//
+// OVR_multiview says a draw is INVALID_OPERATION when the number of views of the draw framebuffer differs from the
+// num_views the program's vertex shader declares. Qualcomm's Quest driver tolerates it; Mesa (the Frame's GL, Zink)
+// enforces it (src/mesa/main/draw_validate.c) and drops the draw silently. Engines that compile every shader with
+// `layout(num_views=2) in;` and also draw into ordinary 2D framebuffers (Doom3Quest's HUD/PDA pool: glTexImage2D
+// textures + renderbuffers) then get black panels.
+//
+// This library sits between such an engine and libGLESv3: the patch puts it first in the engine library's DT_NEEDED
+// (direct gl* imports bind here) and points the engine's dlopen("libGLESv3.so") at it (same-length name, so its
+// qgl* table from dlsym binds here too); every function it doesn't define resolves to libGLESv3 through its own
+// dependency (linked --no-as-needed). When a multiview program draws into a framebuffer whose color attachment has no
+// views (2D texture, texture layer, renderbuffer, FBO 0), the draw uses a lazily built single-view twin of the program
+// (glmv_rewrite.h: num_views layout removed, gl_ViewID_OVR -> 0u), with the original's attribute locations, uniform
+// block bindings and default-block uniform values (copied before every such draw), then the original is bound again.
+//
+// Logcat tag GLMV. Setting gl_mv_debug=1 (libframe_settings.so / framebridge.conf / FRAMEBRIDGE_CONFIG, as the GL
+// shim): glGetError after every twin draw, and per-5-s counters.
+#define _GNU_SOURCE
+#include <EGL/egl.h>
+#include <GLES3/gl32.h>
+#include <android/log.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "glmv_rewrite.h"
+
+#define TAG "GLMV"
+#define LOG(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__)
+#define EXPORT __attribute__((visibility("default")))
+#ifndef GLMV_GLES_LIB  // (the host test points these at a stand-in GL library)
+#define GLMV_GLES_LIB "libGLESv3.so"
+#define GLMV_EGL_LIB "libEGL.so"
+#endif
+#ifndef GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR 0x9630
+#endif
+
+// ---------------------------------------------------------------- real functions (only ever from libGLESv3's handle)
+#define REAL_LIST(X) \
+    X(void, UseProgram, (GLuint)) \
+    X(void, LinkProgram, (GLuint)) \
+    X(void, DeleteProgram, (GLuint)) \
+    X(void, BindFramebuffer, (GLenum, GLuint)) \
+    X(void, DeleteFramebuffers, (GLsizei, const GLuint *)) \
+    X(void, FramebufferTexture2D, (GLenum, GLenum, GLenum, GLuint, GLint)) \
+    X(void, FramebufferRenderbuffer, (GLenum, GLenum, GLenum, GLuint)) \
+    X(void, FramebufferTextureLayer, (GLenum, GLenum, GLuint, GLint, GLint)) \
+    X(void, FramebufferTexture, (GLenum, GLenum, GLuint, GLint)) \
+    X(void, DrawBuffers, (GLsizei, const GLenum *)) \
+    X(void, DrawArrays, (GLenum, GLint, GLsizei)) \
+    X(void, DrawElements, (GLenum, GLsizei, GLenum, const void *)) \
+    X(void, DrawArraysInstanced, (GLenum, GLint, GLsizei, GLsizei)) \
+    X(void, DrawElementsInstanced, (GLenum, GLsizei, GLenum, const void *, GLsizei)) \
+    X(void, DrawRangeElements, (GLenum, GLuint, GLuint, GLsizei, GLenum, const void *)) \
+    X(void, DrawArraysIndirect, (GLenum, const void *)) \
+    X(void, DrawElementsIndirect, (GLenum, GLenum, const void *)) \
+    X(void, DrawElementsBaseVertex, (GLenum, GLsizei, GLenum, const void *, GLint)) \
+    X(void, DrawRangeElementsBaseVertex, (GLenum, GLuint, GLuint, GLsizei, GLenum, const void *, GLint)) \
+    X(void, DrawElementsInstancedBaseVertex, (GLenum, GLsizei, GLenum, const void *, GLsizei, GLint)) \
+    X(GLenum, GetError, (void)) \
+    X(void, GetIntegerv, (GLenum, GLint *)) \
+    X(void, GetFramebufferAttachmentParameteriv, (GLenum, GLenum, GLenum, GLint *)) \
+    X(void, GetProgramiv, (GLuint, GLenum, GLint *)) \
+    X(void, GetProgramInfoLog, (GLuint, GLsizei, GLsizei *, GLchar *)) \
+    X(void, GetShaderiv, (GLuint, GLenum, GLint *)) \
+    X(void, GetShaderInfoLog, (GLuint, GLsizei, GLsizei *, GLchar *)) \
+    X(void, GetShaderSource, (GLuint, GLsizei, GLsizei *, GLchar *)) \
+    X(void, GetAttachedShaders, (GLuint, GLsizei, GLsizei *, GLuint *)) \
+    X(GLuint, CreateShader, (GLenum)) \
+    X(void, ShaderSource, (GLuint, GLsizei, const GLchar *const *, const GLint *)) \
+    X(void, CompileShader, (GLuint)) \
+    X(void, DeleteShader, (GLuint)) \
+    X(GLuint, CreateProgram, (void)) \
+    X(void, AttachShader, (GLuint, GLuint)) \
+    X(void, BindAttribLocation, (GLuint, GLuint, const GLchar *)) \
+    X(void, GetActiveAttrib, (GLuint, GLuint, GLsizei, GLsizei *, GLint *, GLenum *, GLchar *)) \
+    X(GLint, GetAttribLocation, (GLuint, const GLchar *)) \
+    X(void, GetActiveUniform, (GLuint, GLuint, GLsizei, GLsizei *, GLint *, GLenum *, GLchar *)) \
+    X(void, GetActiveUniformsiv, (GLuint, GLsizei, const GLuint *, GLenum, GLint *)) \
+    X(GLint, GetUniformLocation, (GLuint, const GLchar *)) \
+    X(void, GetUniformfv, (GLuint, GLint, GLfloat *)) \
+    X(void, GetUniformiv, (GLuint, GLint, GLint *)) \
+    X(void, GetUniformuiv, (GLuint, GLint, GLuint *)) \
+    X(void, GetActiveUniformBlockName, (GLuint, GLuint, GLsizei, GLsizei *, GLchar *)) \
+    X(void, GetActiveUniformBlockiv, (GLuint, GLuint, GLenum, GLint *)) \
+    X(GLuint, GetUniformBlockIndex, (GLuint, const GLchar *)) \
+    X(void, UniformBlockBinding, (GLuint, GLuint, GLuint)) \
+    X(void, Uniform1fv, (GLint, GLsizei, const GLfloat *)) \
+    X(void, Uniform2fv, (GLint, GLsizei, const GLfloat *)) \
+    X(void, Uniform3fv, (GLint, GLsizei, const GLfloat *)) \
+    X(void, Uniform4fv, (GLint, GLsizei, const GLfloat *)) \
+    X(void, Uniform1iv, (GLint, GLsizei, const GLint *)) \
+    X(void, Uniform2iv, (GLint, GLsizei, const GLint *)) \
+    X(void, Uniform3iv, (GLint, GLsizei, const GLint *)) \
+    X(void, Uniform4iv, (GLint, GLsizei, const GLint *)) \
+    X(void, Uniform1uiv, (GLint, GLsizei, const GLuint *)) \
+    X(void, Uniform2uiv, (GLint, GLsizei, const GLuint *)) \
+    X(void, Uniform3uiv, (GLint, GLsizei, const GLuint *)) \
+    X(void, Uniform4uiv, (GLint, GLsizei, const GLuint *)) \
+    X(void, UniformMatrix2fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix3fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix4fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix2x3fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix3x2fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix2x4fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix4x2fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix3x4fv, (GLint, GLsizei, GLboolean, const GLfloat *)) \
+    X(void, UniformMatrix4x3fv, (GLint, GLsizei, GLboolean, const GLfloat *))
+
+#define DECL(ret, name, args) static ret(*r_##name) args;
+REAL_LIST(DECL)
+#undef DECL
+typedef void (*PFN_FTMV)(GLenum, GLenum, GLuint, GLint, GLint, GLsizei);
+typedef void (*PFN_FTMSMV)(GLenum, GLenum, GLuint, GLint, GLsizei, GLint, GLsizei);
+static PFN_FTMV r_ftmv;
+static PFN_FTMSMV r_ftmsmv;
+static __eglMustCastToProperFunctionPointerType (*r_eglGetProcAddress)(const char *);
+static EGLBoolean (*r_eglMakeCurrent)(EGLDisplay, EGLSurface, EGLSurface, EGLContext);
+
+static pthread_once_t once = PTHREAD_ONCE_INIT;
+static int debug;
+
+static void read_conf_file(const char *path) {
+    FILE *f = fopen(path, "r");
+    if (!f) return;
+    char line[256];
+    while (fgets(line, sizeof(line), f))
+        if (!strncmp(line, "gl_mv_debug=", 12)) debug = atoi(line + 12);
+    fclose(f);
+}
+
+// The GL shim's settings sources, later ones winning: libframe_settings.so next to this library, the game's
+// framebridge.conf, then FRAMEBRIDGE_CONFIG (Lepton's per-game settings.conf).
+static void read_conf(void) {
+    Dl_info info;
+    char path[600];
+    if (dladdr((void *)read_conf, &info) && info.dli_fname) {
+        const char *slash = strrchr(info.dli_fname, '/');
+        if (slash && slash - info.dli_fname < 500) {
+            snprintf(path, sizeof(path), "%.*s/libframe_settings.so", (int)(slash - info.dli_fname), info.dli_fname);
+            read_conf_file(path);
+        }
+    }
+    char pkg[256] = {0};
+    FILE *f = fopen("/proc/self/cmdline", "r");
+    if (f) {
+        size_t n = fread(pkg, 1, sizeof(pkg) - 1, f);
+        fclose(f);
+        pkg[n] = 0;
+    }
+    char *colon = strchr(pkg, ':');
+    if (colon) *colon = 0;
+    if (*pkg && !strchr(pkg, '/')) {
+        snprintf(path, sizeof(path), "/sdcard/Android/data/%s/files/framebridge.conf", pkg);
+        read_conf_file(path);
+    }
+    const char *env = getenv("FRAMEBRIDGE_CONFIG");
+    if (env && *env) read_conf_file(env);
+}
+
+static void init(void) {
+    read_conf();
+    void *gles = dlopen(GLMV_GLES_LIB, RTLD_NOW | RTLD_LOCAL);
+    void *egl = dlopen(GLMV_EGL_LIB, RTLD_NOW | RTLD_LOCAL);
+    r_eglGetProcAddress = egl ? dlsym(egl, "eglGetProcAddress") : NULL;
+    r_eglMakeCurrent = egl ? dlsym(egl, "eglMakeCurrent") : NULL;
+    int missing = 0;
+#define LOAD(ret, name, args)                                                                       \
+    r_##name = gles ? (ret(*) args)dlsym(gles, "gl" #name) : NULL;                                  \
+    if (!r_##name && r_eglGetProcAddress) r_##name = (ret(*) args)r_eglGetProcAddress("gl" #name); \
+    missing += !r_##name;
+    REAL_LIST(LOAD)
+#undef LOAD
+    if (r_eglGetProcAddress) {
+        r_ftmv = (PFN_FTMV)r_eglGetProcAddress("glFramebufferTextureMultiviewOVR");
+        r_ftmsmv = (PFN_FTMSMV)r_eglGetProcAddress("glFramebufferTextureMultisampleMultiviewOVR");
+    }
+    LOG("library active: single-view draws of multiview programs (gl_mv_debug=%d, %d GL functions missing)", debug,
+        missing);
+}
+#define INIT() pthread_once(&once, init)
+
+// ---------------------------------------------------------------- programs
+struct uni {
+    GLenum type;
+    GLint orig, var;  // locations in the original and the twin
+    GLuint shadow[16];  // last value given to the twin
+    int valid;
+};
+struct block {
+    GLuint orig_index, var_index;
+    GLint binding;  // last binding given to the twin
+};
+struct prog {
+    GLuint id;
+    int multiview;  // the vertex shader declares num_views
+    int nshaders;
+    GLenum types[6];
+    char *sources[6];  // stage sources at link time (only kept for multiview programs)
+    GLuint twin;  // single-view twin, 0 = not built yet
+    int twin_failed;
+    struct uni *unis;
+    int nunis;
+    struct block *blocks;
+    int nblocks;
+};
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+static struct prog **progs;  // indexed by program name (GL names are small integers)
+static GLuint nprogs;
+
+static struct prog *find_prog(GLuint id, int create) {
+    struct prog *p = NULL;
+    pthread_mutex_lock(&lock);
+    if (id < nprogs) p = progs[id];
+    if (!p && create && id < (1u << 24)) {
+        if (id >= nprogs) {
+            GLuint n = nprogs ? nprogs : 256;
+            while (n <= id) n *= 2;
+            struct prog **grown = realloc(progs, n * sizeof(*grown));
+            if (grown) {
+                memset(grown + nprogs, 0, (n - nprogs) * sizeof(*grown));
+                progs = grown;
+                nprogs = n;
+            }
+        }
+        if (id < nprogs && (p = calloc(1, sizeof(*p)))) {
+            p->id = id;
+            progs[id] = p;
+        }
+    }
+    pthread_mutex_unlock(&lock);
+    return p;
+}
+
+static void drop_twin(struct prog *p) {
+    if (p->twin && r_DeleteProgram) r_DeleteProgram(p->twin);
+    p->twin = 0;
+    p->twin_failed = 0;
+    free(p->unis);
+    p->unis = NULL;
+    p->nunis = 0;
+    free(p->blocks);
+    p->blocks = NULL;
+    p->nblocks = 0;
+}
+
+static void drop_sources(struct prog *p) {
+    for (int i = 0; i < p->nshaders; ++i) free(p->sources[i]);
+    p->nshaders = 0;
+    p->multiview = 0;
+}
+
+static char *shader_source(GLuint sh) {
+    GLint len = 0;
+    r_GetShaderiv(sh, GL_SHADER_SOURCE_LENGTH, &len);
+    if (len <= 0) return NULL;
+    char *src = malloc((size_t)len + 1);
+    if (!src) return NULL;
+    GLsizei got = 0;
+    r_GetShaderSource(sh, len, &got, src);
+    src[got > 0 && got <= len ? got : 0] = 0;
+    return src;
+}
+
+// Before the real link: note whether the program is multiview and keep its stage sources for a later twin.
+static void note_program(GLuint id) {
+    struct prog *p = find_prog(id, 1);
+    if (!p) return;
+    drop_twin(p);
+    drop_sources(p);
+    GLuint shaders[6];
+    GLsizei n = 0;
+    r_GetAttachedShaders(id, 6, &n, shaders);
+    for (GLsizei i = 0; i < n && i < 6; ++i) {
+        GLint type = 0;
+        r_GetShaderiv(shaders[i], GL_SHADER_TYPE, &type);
+        char *src = shader_source(shaders[i]);
+        if (!src) continue;
+        if (type == GL_VERTEX_SHADER && glmv_has_num_views(src)) p->multiview = 1;
+        p->types[p->nshaders] = (GLenum)type;
+        p->sources[p->nshaders++] = src;
+    }
+    if (!p->multiview) drop_sources(p);
+}
+
+// ---------------------------------------------------------------- the single-view twin
+static int components(GLenum type, int *kind) {  // kind: 0 float, 1 int/bool/sampler, 2 uint, 3 matrix
+    switch (type) {
+    case GL_FLOAT: *kind = 0; return 1;
+    case GL_FLOAT_VEC2: *kind = 0; return 2;
+    case GL_FLOAT_VEC3: *kind = 0; return 3;
+    case GL_FLOAT_VEC4: *kind = 0; return 4;
+    case GL_INT: case GL_BOOL: *kind = 1; return 1;
+    case GL_INT_VEC2: case GL_BOOL_VEC2: *kind = 1; return 2;
+    case GL_INT_VEC3: case GL_BOOL_VEC3: *kind = 1; return 3;
+    case GL_INT_VEC4: case GL_BOOL_VEC4: *kind = 1; return 4;
+    case GL_UNSIGNED_INT: *kind = 2; return 1;
+    case GL_UNSIGNED_INT_VEC2: *kind = 2; return 2;
+    case GL_UNSIGNED_INT_VEC3: *kind = 2; return 3;
+    case GL_UNSIGNED_INT_VEC4: *kind = 2; return 4;
+    case GL_FLOAT_MAT2: *kind = 3; return 4;
+    case GL_FLOAT_MAT3: *kind = 3; return 9;
+    case GL_FLOAT_MAT4: *kind = 3; return 16;
+    case GL_FLOAT_MAT2x3: case GL_FLOAT_MAT3x2: *kind = 3; return 6;
+    case GL_FLOAT_MAT2x4: case GL_FLOAT_MAT4x2: *kind = 3; return 8;
+    case GL_FLOAT_MAT3x4: case GL_FLOAT_MAT4x3: *kind = 3; return 12;
+    default: *kind = 1; return 1;  // samplers and images: one int (the unit)
+    }
+}
+
+static GLuint compile(GLenum type, const char *src, GLuint prog_id) {
+    GLuint sh = r_CreateShader(type);
+    if (!sh) return 0;
+    r_ShaderSource(sh, 1, &src, NULL);
+    r_CompileShader(sh);
+    GLint ok = 0;
+    r_GetShaderiv(sh, GL_COMPILE_STATUS, &ok);
+    if (!ok) {
+        char log[600] = {0};
+        r_GetShaderInfoLog(sh, sizeof(log) - 1, NULL, log);
+        LOG("twin of program %u: stage 0x%x failed to compile: %s", prog_id, type, log);
+        r_DeleteShader(sh);
+        return 0;
+    }
+    return sh;
+}
+
+static void copy_attrib_locations(GLuint orig, GLuint twin) {
+    GLint n = 0;
+    r_GetProgramiv(orig, GL_ACTIVE_ATTRIBUTES, &n);
+    for (GLint i = 0; i < n; ++i) {
+        char name[256];
+        GLsizei len = 0;
+        GLint size = 0;
+        GLenum type = 0;
+        r_GetActiveAttrib(orig, (GLuint)i, sizeof(name), &len, &size, &type, name);
+        if (len <= 0 || !strncmp(name, "gl_", 3)) continue;
+        GLint loc = r_GetAttribLocation(orig, name);
+        if (loc >= 0) r_BindAttribLocation(twin, (GLuint)loc, name);
+    }
+}
+
+static void map_uniforms(struct prog *p) {
+    GLint n = 0;
+    r_GetProgramiv(p->twin, GL_ACTIVE_UNIFORMS, &n);
+    int cap = 0;
+    for (GLint i = 0; i < n; ++i) {
+        char name[256];
+        GLsizei len = 0;
+        GLint size = 0;
+        GLenum type = 0;
+        GLuint index = (GLuint)i;
+        GLint block = -1;
+        r_GetActiveUniform(p->twin, index, sizeof(name) - 16, &len, &size, &type, name);
+        r_GetActiveUniformsiv(p->twin, 1, &index, GL_UNIFORM_BLOCK_INDEX, &block);
+        if (len <= 0 || block != -1 || !strncmp(name, "gl_", 3)) continue;  // block members live in buffers
+        char *bracket = len > 3 && !strcmp(name + len - 3, "[0]") ? name + len - 3 : NULL;
+        if (bracket) *bracket = 0;
+        for (GLint e = 0; e < (size > 0 ? size : 1); ++e) {
+            char elem[300];
+            if (bracket) snprintf(elem, sizeof(elem), "%s[%d]", name, e);
+            else snprintf(elem, sizeof(elem), "%s", name);
+            GLint lo = r_GetUniformLocation(p->id, elem), lt = r_GetUniformLocation(p->twin, elem);
+            if (lo < 0 || lt < 0) continue;
+            if (p->nunis == cap) {
+                cap = cap ? cap * 2 : 16;
+                struct uni *grown = realloc(p->unis, (size_t)cap * sizeof(*grown));
+                if (!grown) return;
+                p->unis = grown;
+            }
+            p->unis[p->nunis++] = (struct uni){.type = type, .orig = lo, .var = lt};
+        }
+    }
+    GLint nb = 0;
+    r_GetProgramiv(p->twin, GL_ACTIVE_UNIFORM_BLOCKS, &nb);
+    p->blocks = nb > 0 ? calloc((size_t)nb, sizeof(*p->blocks)) : NULL;
+    for (GLint i = 0; p->blocks && i < nb; ++i) {
+        char name[256];
+        GLsizei len = 0;
+        r_GetActiveUniformBlockName(p->twin, (GLuint)i, sizeof(name), &len, name);
+        GLuint oi = len > 0 ? r_GetUniformBlockIndex(p->id, name) : GL_INVALID_INDEX;
+        if (oi == GL_INVALID_INDEX) continue;
+        p->blocks[p->nblocks++] = (struct block){.orig_index = oi, .var_index = (GLuint)i, .binding = -1};
+    }
+}
+
+static int build_twin(struct prog *p) {
+    GLuint twin = r_CreateProgram(), shaders[6];
+    int ns = 0, layouts = 0, ids = 0;
+    for (int i = 0; twin && i < p->nshaders; ++i) {
+        int l = 0, v = 0;
+        char *src = glmv_rewrite(p->sources[i], &l, &v);
+        GLuint sh = src ? compile(p->types[i], src, p->id) : 0;
+        free(src);
+        if (!sh) { ns = -1; break; }
+        layouts += l;
+        ids += v;
+        r_AttachShader(twin, sh);
+        shaders[ns++] = sh;
+    }
+    if (twin && ns > 0) {
+        copy_attrib_locations(p->id, twin);
+        r_LinkProgram(twin);
+    }
+    for (int i = 0; i < ns; ++i) r_DeleteShader(shaders[i]);  // flagged only; freed with the program
+    GLint ok = 0;
+    if (twin && ns > 0) r_GetProgramiv(twin, GL_LINK_STATUS, &ok);
+    if (!ok) {
+        char log[600] = {0};
+        if (twin && ns > 0) r_GetProgramInfoLog(twin, sizeof(log) - 1, NULL, log);
+        LOG("twin of program %u failed (%s): drawing it unchanged", p->id, ns > 0 ? log : "compile");
+        if (twin) r_DeleteProgram(twin);
+        p->twin_failed = 1;
+        return 0;
+    }
+    p->twin = twin;
+    map_uniforms(p);
+    LOG("twin built: program %u -> %u (%d uniforms, %d blocks, %d num_views layouts and %d gl_ViewID_OVR replaced)",
+        p->id, twin, p->nunis, p->nblocks, layouts, ids);
+    return 1;
+}
+
+static unsigned long uniform_sets;  // twin uniforms changed (statistics)
+
+static void sync_uniforms(struct prog *p) {
+    for (int i = 0; i < p->nunis; ++i) {
+        struct uni *u = &p->unis[i];
+        int kind, n = components(u->type, &kind);
+        GLuint v[16] = {0};
+        if (kind == 0 || kind == 3) r_GetUniformfv(p->id, u->orig, (GLfloat *)v);
+        else if (kind == 2) r_GetUniformuiv(p->id, u->orig, v);
+        else r_GetUniformiv(p->id, u->orig, (GLint *)v);
+        if (u->valid && !memcmp(v, u->shadow, (size_t)n * sizeof(GLuint))) continue;
+        memcpy(u->shadow, v, sizeof(v));
+        u->valid = 1;
+        ++uniform_sets;
+        const GLfloat *f = (const GLfloat *)v;
+        const GLint *iv = (const GLint *)v;
+        switch (u->type) {
+        case GL_FLOAT: r_Uniform1fv(u->var, 1, f); break;
+        case GL_FLOAT_VEC2: r_Uniform2fv(u->var, 1, f); break;
+        case GL_FLOAT_VEC3: r_Uniform3fv(u->var, 1, f); break;
+        case GL_FLOAT_VEC4: r_Uniform4fv(u->var, 1, f); break;
+        case GL_UNSIGNED_INT: r_Uniform1uiv(u->var, 1, v); break;
+        case GL_UNSIGNED_INT_VEC2: r_Uniform2uiv(u->var, 1, v); break;
+        case GL_UNSIGNED_INT_VEC3: r_Uniform3uiv(u->var, 1, v); break;
+        case GL_UNSIGNED_INT_VEC4: r_Uniform4uiv(u->var, 1, v); break;
+        case GL_FLOAT_MAT2: r_UniformMatrix2fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT3: r_UniformMatrix3fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT4: r_UniformMatrix4fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT2x3: r_UniformMatrix2x3fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT3x2: r_UniformMatrix3x2fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT2x4: r_UniformMatrix2x4fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT4x2: r_UniformMatrix4x2fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT3x4: r_UniformMatrix3x4fv(u->var, 1, GL_FALSE, f); break;
+        case GL_FLOAT_MAT4x3: r_UniformMatrix4x3fv(u->var, 1, GL_FALSE, f); break;
+        case GL_INT_VEC2: case GL_BOOL_VEC2: r_Uniform2iv(u->var, 1, iv); break;
+        case GL_INT_VEC3: case GL_BOOL_VEC3: r_Uniform3iv(u->var, 1, iv); break;
+        case GL_INT_VEC4: case GL_BOOL_VEC4: r_Uniform4iv(u->var, 1, iv); break;
+        default: r_Uniform1iv(u->var, 1, iv); break;  // int, bool, samplers
+        }
+    }
+    for (int i = 0; i < p->nblocks; ++i) {
+        struct block *b = &p->blocks[i];
+        GLint binding = 0;
+        r_GetActiveUniformBlockiv(p->id, b->orig_index, GL_UNIFORM_BLOCK_BINDING, &binding);
+        if (binding != b->binding) {
+            r_UniformBlockBinding(p->twin, b->var_index, (GLuint)binding);
+            b->binding = binding;
+        }
+    }
+}
+
+// ---------------------------------------------------------------- per-thread state (a GL context is per thread)
+#define FB_UNKNOWN (-1)
+#define FB_NO_COLOR (-2)
+static __thread struct prog *cur_prog;
+static __thread int fb_views = FB_UNKNOWN;  // views of the draw framebuffer's first color attachment (cached)
+
+static int draw_fb_views(void) {
+    if (fb_views != FB_UNKNOWN) return fb_views;
+    GLint fb = 0;
+    r_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &fb);
+    if (!fb) return fb_views = 0;  // the window surface
+    GLint type = GL_NONE;
+    r_GetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                                          GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &type);
+    if (type == GL_NONE) return fb_views = FB_NO_COLOR;  // depth-only: Mesa doesn't compare views
+    if (type != GL_TEXTURE) return fb_views = 0;  // renderbuffer
+    GLint views = 0;
+    r_GetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                                          GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR, &views);
+    return fb_views = views;
+}
+
+// ---------------------------------------------------------------- statistics (per 5 s)
+static unsigned long twin_draws, mv_draws;
+static struct timespec last_stats;
+static void stats(void) {
+    struct timespec now;
+    clock_gettime(CLOCK_MONOTONIC, &now);
+    if (!last_stats.tv_sec) last_stats = now;
+    if (now.tv_sec - last_stats.tv_sec < 5) return;
+    last_stats = now;
+    if (twin_draws || debug)
+        LOG("5s: %lu single-view draws of multiview programs, %lu multiview draws, %lu twin uniform updates",
+            twin_draws, mv_draws, uniform_sets);
+    twin_draws = mv_draws = uniform_sets = 0;
+}
+
+// Before a draw: bind the twin when the program is multiview and the framebuffer has no views. 1 = twin bound.
+static int begin_draw(void) {
+    struct prog *p = cur_prog;
+    if (!p || !p->multiview || p->twin_failed) return 0;
+    int views = draw_fb_views();
+    if (views != 0) {
+        ++mv_draws;
+        if (debug) stats();
+        return 0;
+    }
+    if (!p->twin && !build_twin(p)) return 0;
+    r_UseProgram(p->twin);
+    sync_uniforms(p);
+    if (debug) r_GetError();  // (debug only: this consumes an earlier error the game hasn't read)
+    return 1;
+}
+
+static void end_draw(const char *what) {
+    struct prog *p = cur_prog;
+    if (debug) {
+        static int logs;
+        GLenum err = r_GetError();
+        if (err && logs < 20) {
+            ++logs;
+            LOG("%s with the twin of program %u: GL error 0x%x", what, p ? p->id : 0, err);
+        }
+    }
+    r_UseProgram(p ? p->id : 0);
+    ++twin_draws;
+    stats();
+}
+
+// ---------------------------------------------------------------- exported GL functions
+EXPORT void glUseProgram(GLuint program) {
+    INIT();
+    r_UseProgram(program);
+    cur_prog = program ? find_prog(program, 0) : NULL;
+}
+
+EXPORT void glLinkProgram(GLuint program) {
+    INIT();
+    note_program(program);
+    r_LinkProgram(program);
+}
+
+EXPORT void glDeleteProgram(GLuint program) {
+    INIT();
+    struct prog *p = program ? find_prog(program, 0) : NULL;
+    if (p) {  // the record stays (pointers to it may be cached); a new program with this name relinks it
+        drop_twin(p);
+        drop_sources(p);
+    }
+    r_DeleteProgram(program);
+}
+
+EXPORT void glBindFramebuffer(GLenum target, GLuint framebuffer) {
+    INIT();
+    r_BindFramebuffer(target, framebuffer);
+    if (target != GL_READ_FRAMEBUFFER) fb_views = FB_UNKNOWN;
+}
+
+EXPORT void glDeleteFramebuffers(GLsizei n, const GLuint *framebuffers) {
+    INIT();
+    r_DeleteFramebuffers(n, framebuffers);
+    fb_views = FB_UNKNOWN;
+}
+
+EXPORT void glFramebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) {
+    INIT();
+    r_FramebufferTexture2D(target, attachment, textarget, texture, level);
+    fb_views = FB_UNKNOWN;
+}
+
+EXPORT void glFramebufferRenderbuffer(GLenum target, GLenum attachment, GLenum rbtarget, GLuint renderbuffer) {
+    INIT();
+    r_FramebufferRenderbuffer(target, attachment, rbtarget, renderbuffer);
+    fb_views = FB_UNKNOWN;
+}
+
+EXPORT void glFramebufferTextureLayer(GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer) {
+    INIT();
+    r_FramebufferTextureLayer(target, attachment, texture, level, layer);
+    fb_views = FB_UNKNOWN;
+}
+
+EXPORT void glFramebufferTexture(GLenum target, GLenum attachment, GLuint texture, GLint level) {
+    INIT();
+    if (r_FramebufferTexture) r_FramebufferTexture(target, attachment, texture, level);
+    fb_views = FB_UNKNOWN;
+}
+
+EXPORT void glDrawBuffers(GLsizei n, const GLenum *bufs) {
+    INIT();
+    r_DrawBuffers(n, bufs);
+    fb_views = FB_UNKNOWN;
+}
+
+static void w_ftmv(GLenum target, GLenum attachment, GLuint texture, GLint level, GLint base, GLsizei views) {
+    r_ftmv(target, attachment, texture, level, base, views);
+    fb_views = FB_UNKNOWN;
+}
+
+static void w_ftmsmv(GLenum target, GLenum attachment, GLuint texture, GLint level, GLsizei samples, GLint base,
+                     GLsizei views) {
+    r_ftmsmv(target, attachment, texture, level, samples, base, views);
+    fb_views = FB_UNKNOWN;
+}
+
+#define DRAW(name, call)                \
+    INIT();                             \
+    if (!r_##name) return;              \
+    if (begin_draw()) {                 \
+        r_##name call;                  \
+        end_draw("gl" #name);           \
+    } else {                            \
+        r_##name call;                  \
+    }
+
+EXPORT void glDrawArrays(GLenum mode, GLint first, GLsizei count) { DRAW(DrawArrays, (mode, first, count)) }
+EXPORT void glDrawElements(GLenum mode, GLsizei count, GLenum type, const void *indices) {
+    DRAW(DrawElements, (mode, count, type, indices))
+}
+EXPORT void glDrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei instances) {
+    DRAW(DrawArraysInstanced, (mode, first, count, instances))
+}
+EXPORT void glDrawElementsInstanced(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instances) {
+    DRAW(DrawElementsInstanced, (mode, count, type, indices, instances))
+}
+EXPORT void glDrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type,
+                                const void *indices) {
+    DRAW(DrawRangeElements, (mode, start, end, count, type, indices))
+}
+EXPORT void glDrawArraysIndirect(GLenum mode, const void *indirect) { DRAW(DrawArraysIndirect, (mode, indirect)) }
+EXPORT void glDrawElementsIndirect(GLenum mode, GLenum type, const void *indirect) {
+    DRAW(DrawElementsIndirect, (mode, type, indirect))
+}
+EXPORT void glDrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type, const void *indices, GLint base) {
+    DRAW(DrawElementsBaseVertex, (mode, count, type, indices, base))
+}
+EXPORT void glDrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type,
+                                          const void *indices, GLint base) {
+    DRAW(DrawRangeElementsBaseVertex, (mode, start, end, count, type, indices, base))
+}
+EXPORT void glDrawElementsInstancedBaseVertex(GLenum mode, GLsizei count, GLenum type, const void *indices,
+                                              GLsizei instances, GLint base) {
+    DRAW(DrawElementsInstancedBaseVertex, (mode, count, type, indices, instances, base))
+}
+
+// A context made current on this thread (engines with a render thread move theirs between threads, e.g. Doom3Quest's
+// GLimp_ActivateContext): what this thread knew about the bound program and framebuffer may be another context's.
+EXPORT EGLBoolean eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx) {
+    INIT();
+    if (!r_eglMakeCurrent) return EGL_FALSE;
+    EGLBoolean ok = r_eglMakeCurrent(dpy, draw, read, ctx);
+    fb_views = FB_UNKNOWN;
+    cur_prog = NULL;
+    if (ok && ctx != EGL_NO_CONTEXT && r_GetIntegerv) {
+        GLint program = 0;
+        r_GetIntegerv(GL_CURRENT_PROGRAM, &program);
+        cur_prog = program > 0 ? find_prog((GLuint)program, 0) : NULL;
+    }
+    return ok;
+}
+
+// Engines fetch the OVR multiview functions (and SDL-style loaders every function) through eglGetProcAddress.
+EXPORT __eglMustCastToProperFunctionPointerType eglGetProcAddress(const char *name) {
+    INIT();
+    __eglMustCastToProperFunctionPointerType fn = r_eglGetProcAddress ? r_eglGetProcAddress(name) : NULL;
+    if (!fn || !name) return fn;
+    if (!strcmp(name, "glFramebufferTextureMultiviewOVR")) {
+        if (!r_ftmv) r_ftmv = (PFN_FTMV)fn;
+        return (__eglMustCastToProperFunctionPointerType)w_ftmv;
+    }
+    if (!strcmp(name, "glFramebufferTextureMultisampleMultiviewOVR")) {
+        if (!r_ftmsmv) r_ftmsmv = (PFN_FTMSMV)fn;
+        return (__eglMustCastToProperFunctionPointerType)w_ftmsmv;
+    }
+#define OWN(sym) if (!strcmp(name, #sym)) return (__eglMustCastToProperFunctionPointerType)sym;
+    OWN(glUseProgram) OWN(glLinkProgram) OWN(glDeleteProgram) OWN(glBindFramebuffer) OWN(glDeleteFramebuffers)
+    OWN(glFramebufferTexture2D) OWN(glFramebufferRenderbuffer) OWN(glFramebufferTextureLayer)
+    OWN(glFramebufferTexture) OWN(glDrawBuffers) OWN(glDrawArrays) OWN(glDrawElements) OWN(glDrawArraysInstanced)
+    OWN(glDrawElementsInstanced) OWN(glDrawRangeElements) OWN(glDrawArraysIndirect) OWN(glDrawElementsIndirect)
+    OWN(glDrawElementsBaseVertex) OWN(glDrawRangeElementsBaseVertex) OWN(glDrawElementsInstancedBaseVertex)
+    OWN(eglMakeCurrent)
+#undef OWN
+    return fn;
+}

native/glmv/glmv_rewrite.h

@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// GLSL source rewrite for libfpglmv.so (see glmv.c): turns an OVR_multiview shader into its single-view twin.
+//   - every `layout(... num_views ...) in;` statement is blanked out (the program then declares no views, which is
+//     what Mesa requires for a draw into a framebuffer whose attachments aren't multiview)
+//   - every gl_ViewID_OVR token becomes (0u): view 0 (the left eye's matrices in Doom3Quest)
+// #extension lines stay (the driver supports OVR_multiview; enabling it without a num_views layout is harmless).
+// Columns and line numbers are kept (blanks pad the replacements), so compile logs point at the same places.
+// Plain C, no GL: the host unit test (tests/fixtures/src/glmv_rewrite_test.c) compiles it too.
+#pragma once
+#include <stdlib.h>
+#include <string.h>
+
+static int glmv_ident_char(char c) {
+    return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '_';
+}
+
+// `word` at p as a whole token (not part of a longer identifier)
+static int glmv_token_at(const char *start, const char *p, const char *word) {
+    size_t n = strlen(word);
+    if (strncmp(p, word, n) != 0) return 0;
+    if (p > start && glmv_ident_char(p[-1])) return 0;
+    return !glmv_ident_char(p[n]);
+}
+
+static const char *glmv_skip_ws(const char *p) {
+    while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == '\f' || *p == '\v') ++p;
+    return p;
+}
+
+// If a `layout(...num_views...) in;` statement starts at p, returns a pointer to its ';', else NULL.
+static const char *glmv_num_views_stmt(const char *start, const char *p) {
+    if (!glmv_token_at(start, p, "layout")) return NULL;
+    const char *q = glmv_skip_ws(p + 6);
+    if (*q != '(') return NULL;
+    const char *open = q;
+    int depth = 0;
+    for (; *q; ++q) {
+        if (*q == '(') ++depth;
+        else if (*q == ')' && --depth == 0) break;
+    }
+    if (!*q) return NULL;
+    const char *close = q;
+    int has_views = 0;
+    for (const char *r = open + 1; r < close; ++r)
+        if (glmv_token_at(start, r, "num_views")) { has_views = 1; break; }
+    if (!has_views) return NULL;
+    q = glmv_skip_ws(close + 1);
+    if (!glmv_token_at(start, q, "in")) return NULL;
+    q = glmv_skip_ws(q + 2);
+    return *q == ';' ? q : NULL;
+}
+
+// 1 if the source declares multiview views (a vertex shader of an OVR_multiview program)
+static int glmv_has_num_views(const char *src) {
+    for (const char *p = src; (p = strstr(p, "layout")); p += 6)
+        if (glmv_num_views_stmt(src, p)) return 1;
+    return 0;
+}
+
+// The single-view twin of `src` (malloc'd, same length), or NULL when out of memory. Counts go to *layouts / *ids.
+static char *glmv_rewrite(const char *src, int *layouts, int *ids) {
+    static const char id_tok[] = "gl_ViewID_OVR";  // 13 characters
+    static const char zero[] = "(0u)";
+    size_t n = strlen(src);
+    char *out = (char *)malloc(n + 1);
+    if (!out) return NULL;
+    memcpy(out, src, n + 1);
+    int nl = 0, ni = 0;
+    for (char *p = out; (p = strstr(p, "layout"));) {
+        const char *semi = glmv_num_views_stmt(out, p);
+        if (!semi) { p += 6; continue; }
+        for (char *b = p; b <= semi; ++b)
+            if (*b != '\n' && *b != '\r') *b = ' ';
+        ++nl;
+        p = (char *)semi + 1;
+    }
+    for (char *p = out; (p = strstr(p, id_tok));) {
+        if (!glmv_token_at(out, p, id_tok)) { p += sizeof(id_tok) - 1; continue; }
+        memcpy(p, zero, sizeof(zero) - 1);
+        memset(p + sizeof(zero) - 1, ' ', sizeof(id_tok) - sizeof(zero));
+        ++ni;
+        p += sizeof(id_tok) - 1;
+    }
+    if (layouts) *layouts = nl;
+    if (ids) *ids = ni;
+    return out;
+}

native/glshim/eglfmt.c

@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// FramePort depth-format shim for GL-to-GLES wrappers (QuestCraft's LTW): desktop OpenGL's sized depth format
+// GL_DEPTH_COMPONENT32 doesn't exist in OpenGL ES. Qualcomm's Quest driver accepts it anyway; the Frame's Mesa (Zink)
+// rejects it (GL_INVALID_OPERATION in glTexImage2D), so Minecraft's depth textures never exist, every framebuffer that
+// uses them is incomplete and the picture stays black. LTW resolves every GLES function through eglGetProcAddress from
+// a libEGL it dlopens itself; FramePort points that dlopen string at this library (patches/frame/ltw_depth.py), which
+// hands back wrappers for the texture/renderbuffer allocation functions and the real functions for everything else:
+//   GL_DEPTH_COMPONENT32 -> GL_DEPTH_COMPONENT32F (GL_DEPTH_COMPONENT24 when pixel data comes as GL_UNSIGNED_INT),
+//   unsized GL_DEPTH_COMPONENT with GL_FLOAT data -> GL_DEPTH_COMPONENT32F.
+#define _GNU_SOURCE
+#include <EGL/egl.h>
+#include <GLES3/gl32.h>
+#include <android/log.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <string.h>
+
+#define LOG(...) __android_log_print(ANDROID_LOG_INFO, "FrameBridge", __VA_ARGS__)
+#define EXPORT __attribute__((visibility("default")))
+#ifndef GL_DEPTH_COMPONENT32
+#define GL_DEPTH_COMPONENT32 0x81A7
+#endif
+
+typedef __eglMustCastToProperFunctionPointerType FnPtr;
+static FnPtr (*real_gpa)(const char *);
+static pthread_once_t once = PTHREAD_ONCE_INIT;
+static int logged;
+
+static void init(void) {
+    void *egl = dlopen("libEGL.so", RTLD_NOW | RTLD_LOCAL);
+    real_gpa = egl ? (FnPtr (*)(const char *))dlsym(egl, "eglGetProcAddress") : NULL;
+    LOG("depth format shim: libEGL.so %s", real_gpa ? "OK" : "MISSING");
+}
+
+// the ES internal format for a desktop depth request (`type` = the pixel data type, 0 when there is none)
+static GLint fix(GLint internal, GLenum type, const char *fn) {
+    GLint out = internal;
+    if (internal == GL_DEPTH_COMPONENT32) out = type == GL_UNSIGNED_INT ? GL_DEPTH_COMPONENT24 : GL_DEPTH_COMPONENT32F;
+    else if (internal == GL_DEPTH_COMPONENT && type == GL_FLOAT) out = GL_DEPTH_COMPONENT32F;
+    if (out != internal && logged < 8) {
+        logged++;
+        LOG("depth format shim: %s 0x%x -> 0x%x", fn, internal, out);
+    }
+    return out;
+}
+
+static PFNGLTEXIMAGE2DPROC r_ti2;
+static PFNGLTEXIMAGE3DPROC r_ti3;
+static PFNGLTEXSTORAGE2DPROC r_ts2;
+static PFNGLTEXSTORAGE3DPROC r_ts3;
+static PFNGLTEXSTORAGE2DMULTISAMPLEPROC r_ts2ms;
+static PFNGLTEXSTORAGE3DMULTISAMPLEPROC r_ts3ms;
+static PFNGLRENDERBUFFERSTORAGEPROC r_rbs;
+static PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC r_rbsms;
+
+static void GL_APIENTRY w_ti2(GLenum t, GLint l, GLint i, GLsizei w, GLsizei h, GLint b, GLenum f, GLenum ty, const void *d) {
+    r_ti2(t, l, fix(i, ty, "glTexImage2D"), w, h, b, f, ty, d);
+}
+static void GL_APIENTRY w_ti3(GLenum t, GLint l, GLint i, GLsizei w, GLsizei h, GLsizei dp, GLint b, GLenum f, GLenum ty,
+                              const void *d) {
+    r_ti3(t, l, fix(i, ty, "glTexImage3D"), w, h, dp, b, f, ty, d);
+}
+static void GL_APIENTRY w_ts2(GLenum t, GLsizei l, GLenum i, GLsizei w, GLsizei h) {
+    r_ts2(t, l, (GLenum)fix((GLint)i, 0, "glTexStorage2D"), w, h);
+}
+static void GL_APIENTRY w_ts3(GLenum t, GLsizei l, GLenum i, GLsizei w, GLsizei h, GLsizei d) {
+    r_ts3(t, l, (GLenum)fix((GLint)i, 0, "glTexStorage3D"), w, h, d);
+}
+static void GL_APIENTRY w_ts2ms(GLenum t, GLsizei s, GLenum i, GLsizei w, GLsizei h, GLboolean fl) {
+    r_ts2ms(t, s, (GLenum)fix((GLint)i, 0, "glTexStorage2DMultisample"), w, h, fl);
+}
+static void GL_APIENTRY w_ts3ms(GLenum t, GLsizei s, GLenum i, GLsizei w, GLsizei h, GLsizei d, GLboolean fl) {
+    r_ts3ms(t, s, (GLenum)fix((GLint)i, 0, "glTexStorage3DMultisample"), w, h, d, fl);
+}
+static void GL_APIENTRY w_rbs(GLenum t, GLenum i, GLsizei w, GLsizei h) {
+    r_rbs(t, (GLenum)fix((GLint)i, 0, "glRenderbufferStorage"), w, h);
+}
+static void GL_APIENTRY w_rbsms(GLenum t, GLsizei s, GLenum i, GLsizei w, GLsizei h) {
+    r_rbsms(t, s, (GLenum)fix((GLint)i, 0, "glRenderbufferStorageMultisample"), w, h);
+}
+
+EXPORT FnPtr eglGetProcAddress(const char *name) {
+    pthread_once(&once, init);
+    FnPtr fn = real_gpa && name ? real_gpa(name) : NULL;
+    if (!fn) return fn;
+#define WRAP(sym, real, w) if (!strcmp(name, sym)) { real = (void *)fn; return (FnPtr)w; }
+    WRAP("glTexImage2D", r_ti2, w_ti2)
+    WRAP("glTexImage3D", r_ti3, w_ti3)
+    WRAP("glTexStorage2D", r_ts2, w_ts2)
+    WRAP("glTexStorage3D", r_ts3, w_ts3)
+    WRAP("glTexStorage2DMultisample", r_ts2ms, w_ts2ms)
+    WRAP("glTexStorage3DMultisample", r_ts3ms, w_ts3ms)
+    WRAP("glRenderbufferStorage", r_rbs, w_rbs)
+    WRAP("glRenderbufferStorageMultisample", r_rbsms, w_rbsms)
+#undef WRAP
+    return fn;
+}

native/glshim/glshim.c

@@ -13,9 +13,14 @@
 
 #define LOG(...) __android_log_print(ANDROID_LOG_INFO, "GLShim", __VA_ARGS__)
 
-static const char *const hidden[] = {
+static const char *const hidden_multiview[] = {
     "GL_OVR_multiview", "GL_OVR_multiview2", "GL_OVR_multiview_multisampled_render_to_texture",
+};
+// multisampled render-to-texture: Unity renders a runtime MSAA eye buffer through it, which crashes Zink (SIGSEGV in
+// libgallium_dri.so, e.g. The Room VR); hidden, Unity uses an ordinary MSAA renderbuffer + resolve
+static const char *const hidden_msrtt[] = {
     "GL_EXT_multisampled_render_to_texture", "GL_EXT_multisampled_render_to_texture2",
+    "GL_OVR_multiview_multisampled_render_to_texture",
 };
 
 static void *gles;
@@ -25,23 +30,52 @@ static void (*real_glGetIntegerv)(GLenum, GLint *);
 static __eglMustCastToProperFunctionPointerType (*real_eglGetProcAddress)(const char *);
 static pthread_once_t once = PTHREAD_ONCE_INIT;
 
-static int hide_multiview = 1;
+static int hide_multiview = -1;  // -1: not set (Unity and Unreal keep multiview, everything else hides it)
+static int hide_msrtt = 1;
+// Unreal (4.25) only turns on its mobile multiview when GL_OVR_multiview, GL_OVR_multiview2 AND
+// GL_OVR_multiview_multisampled_render_to_texture are all there (FOpenGLES::ProcessExtensions). Hiding the last one
+// with the MSRTT extensions switched Unreal's multiview off, so for Unreal it stays visible and its function draws
+// single-sampled (glFramebufferTextureMultiviewOVR), like the EXT stand-ins below.
+static int unreal;
 
-static void read_conf(void) {
-    char pkg[256] = {0}, path[512];
-    FILE *f = fopen("/proc/self/cmdline", "r");
+static void read_conf_file(const char *path) {
+    FILE *f = fopen(path, "r");
     if (!f) return;
-    size_t n = fread(pkg, 1, sizeof(pkg) - 1, f);
+    char line[256];
+    while (fgets(line, sizeof(line), f)) {
+        if (!strncmp(line, "gl_hide_multiview=", 18)) hide_multiview = atoi(line + 18);
+        if (!strncmp(line, "gl_hide_msrtt=", 14)) hide_msrtt = atoi(line + 14);
+    }
     fclose(f);
-    pkg[n] = 0;
+}
+
+// The same settings sources as FrameBridge, later ones winning: the build's libframe_settings.so (next to this
+// library), the game's framebridge.conf, then FRAMEBRIDGE_CONFIG (Lepton's per-game settings.conf).
+static void read_conf(void) {
+    Dl_info info;
+    char path[600];
+    if (dladdr((void *)read_conf, &info) && info.dli_fname) {
+        const char *slash = strrchr(info.dli_fname, '/');
+        if (slash && slash - info.dli_fname < 500) {
+            snprintf(path, sizeof(path), "%.*s/libframe_settings.so", (int)(slash - info.dli_fname), info.dli_fname);
+            read_conf_file(path);
+        }
+    }
+    char pkg[256] = {0};
+    FILE *f = fopen("/proc/self/cmdline", "r");
+    if (f) {
+        size_t n = fread(pkg, 1, sizeof(pkg) - 1, f);
+        fclose(f);
+        pkg[n] = 0;
+    }
     char *colon = strchr(pkg, ':');
     if (colon) *colon = 0;
-    snprintf(path, sizeof(path), "/sdcard/Android/data/%s/files/framebridge.conf", pkg);
-    if (!(f = fopen(path, "r"))) return;
-    char line[128];
-    while (fgets(line, sizeof(line), f))
-        if (!strncmp(line, "gl_hide_multiview=", 18)) hide_multiview = atoi(line + 18);
-    fclose(f);
+    if (*pkg && !strchr(pkg, '/')) {
+        snprintf(path, sizeof(path), "/sdcard/Android/data/%s/files/framebridge.conf", pkg);
+        read_conf_file(path);
+    }
+    const char *env = getenv("FRAMEBRIDGE_CONFIG");
+    if (env && *env) read_conf_file(env);
 }
 
 // Logging wrappers for the framebuffer calls engines use for eye buffers.
@@ -306,13 +340,31 @@ static void init(void) {
     real_glGetStringi = gles ? dlsym(gles, "glGetStringi") : NULL;
     real_glGetIntegerv = gles ? dlsym(gles, "glGetIntegerv") : NULL;
     real_eglGetProcAddress = egl ? dlsym(egl, "eglGetProcAddress") : NULL;
-    LOG("GL shim active: hide_multiview=%d", hide_multiview);
+    static const char *const engines[] = {"libunity.so", "libUE4.so", "libUnreal.so"};
+    int engine_found = 0;
+    for (unsigned i = 0; i < sizeof engines / sizeof *engines && !engine_found; i++) {
+        void *engine = dlopen(engines[i], RTLD_NOW | RTLD_NOLOAD);
+        if (engine) {
+            engine_found = 1;
+            unreal = i > 0;
+            dlclose(engine);
+        }
+    }
+    // Unity and Unreal render multiview themselves and only need MSRTT hidden
+    if (hide_multiview < 0) hide_multiview = !engine_found;
+    unreal = unreal && hide_msrtt && !hide_multiview;  // only matters while MSRTT is hidden and multiview kept
+    LOG("GL shim active: hide_multiview=%d hide_msrtt=%d%s", hide_multiview, hide_msrtt,
+        unreal ? " (Unreal: multiview MSRTT kept, drawn single-sampled)" : "");
 }
 
 static int is_hidden(const char *name) {
-    if (!hide_multiview) return 0;
-    for (size_t i = 0; i < sizeof(hidden) / sizeof(hidden[0]); ++i)
-        if (!strcmp(name, hidden[i])) return 1;
+    if (hide_multiview)
+        for (size_t i = 0; i < sizeof(hidden_multiview) / sizeof(hidden_multiview[0]); ++i)
+            if (!strcmp(name, hidden_multiview[i])) return 1;
+    if (hide_msrtt)
+        for (size_t i = 0; i < sizeof(hidden_msrtt) / sizeof(hidden_msrtt[0]); ++i)
+            if (!strcmp(name, hidden_msrtt[i]))
+                return !(unreal && !strcmp(name, "GL_OVR_multiview_multisampled_render_to_texture"));
     return 0;
 }
 
@@ -362,6 +414,32 @@ __attribute__((visibility("default"))) const GLubyte *glGetString(GLenum name) {
     return (const GLubyte *)filtered;
 }
 
+// With GL_EXT_multisampled_render_to_texture hidden (gl_hide_msrtt), an app that calls its functions anyway (Team
+// Beef's TBXR, e.g. Lambda1VR: color via glFramebufferTexture2DMultisampleEXT, depth via
+// glRenderbufferStorageMultisampleEXT) gets plain single-sampled versions, so both attachments match: Zink called
+// the mix GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE and the eyes stayed black.
+typedef void (*PFN_FT2D)(GLenum, GLenum, GLenum, GLuint, GLint);
+typedef void (*PFN_RBS)(GLenum, GLenum, GLsizei, GLsizei);
+static PFN_FT2D r_plain_ft2d;
+static PFN_RBS r_plain_rbs;
+static int msrtt_logged;
+static void plain_ft2dms(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLsizei samples) {
+    if (!msrtt_logged++) LOG("GL shim: multisampled render-to-texture (%d samples) drawn single-sampled", (int)samples);
+    if (r_plain_ft2d) r_plain_ft2d(target, attachment, textarget, texture, level);
+}
+static void plain_rbsms(GLenum target, GLsizei samples, GLenum format, GLsizei width, GLsizei height) {
+    (void)samples;
+    if (r_plain_rbs) r_plain_rbs(target, format, width, height);
+}
+static PFN_FTMV r_plain_ftmv;
+static int mv_msrtt_logged;
+static void plain_ftmsmv(GLenum target, GLenum attachment, GLuint texture, GLint level, GLsizei samples,
+                         GLint base, GLsizei views) {
+    if (!mv_msrtt_logged++)
+        LOG("GL shim: multiview multisampled render-to-texture (%d samples) drawn single-sampled", (int)samples);
+    if (r_plain_ftmv) r_plain_ftmv(target, attachment, texture, level, base, views);
+}
+
 __attribute__((visibility("default"))) __eglMustCastToProperFunctionPointerType eglGetProcAddress(const char *name) {
     pthread_once(&once, init);
     if (name && !strcmp(name, "glGetStringi")) return (__eglMustCastToProperFunctionPointerType)glGetStringi;
@@ -370,6 +448,17 @@ __attribute__((visibility("default"))) __eglMustCastToProperFunctionPointerType
     __eglMustCastToProperFunctionPointerType fn = real_eglGetProcAddress ? real_eglGetProcAddress(name) : NULL;
     if (!fn || !name) return fn;
 #define WRAP(sym, real, w) if (!strcmp(name, sym)) { real = (void *)fn; return (__eglMustCastToProperFunctionPointerType)w; }
+    if (hide_msrtt && (!strcmp(name, "glFramebufferTexture2DMultisampleEXT") ||
+                       !strcmp(name, "glRenderbufferStorageMultisampleEXT"))) {
+        if (!r_plain_ft2d) r_plain_ft2d = (PFN_FT2D)real_eglGetProcAddress("glFramebufferTexture2D");
+        if (!r_plain_rbs) r_plain_rbs = (PFN_RBS)real_eglGetProcAddress("glRenderbufferStorage");
+        return name[2] == 'F' ? (__eglMustCastToProperFunctionPointerType)plain_ft2dms
+                              : (__eglMustCastToProperFunctionPointerType)plain_rbsms;
+    }
+    if (unreal && !strcmp(name, "glFramebufferTextureMultisampleMultiviewOVR")) {
+        if (!r_plain_ftmv) r_plain_ftmv = (PFN_FTMV)real_eglGetProcAddress("glFramebufferTextureMultiviewOVR");
+        return (__eglMustCastToProperFunctionPointerType)plain_ftmsmv;
+    }
 #ifdef GLSHIM_TRACE  // build with -DGLSHIM_TRACE for eye-buffer / draw / error tracing
     WRAP("glFramebufferTextureMultiviewOVR", real_ftmv, w_ftmv)
     WRAP("glFramebufferTextureMultisampleMultiviewOVR", real_ftmsmv, w_ftmsmv)

native/langpack/langpack.c

@@ -30,6 +30,12 @@
 //
 // Which pack is "current": the one the game applied with SetCurrent; else $FRAMEPORT_LANGPACK (a tag); else the only
 // pack if there is exactly one.
+//
+// Content files (patch frame.asset_files, which sets the marker byte g_assets_slot; or FRAMEPORT_ASSET_FILES=1):
+// every *.pak next to the game's OBB is also listed as an installed asset file of type "default" (Meta's type for
+// content that comes with the game, IAP status "free"), named after the file. ovr_AssetFile_DownloadById on one of
+// them answers at once with a completed download update and a result carrying the file's path (nothing is copied).
+// E.g. Star Wars: Tales from the Galaxy's Edge, whose seasons and sound banks are such files (ETacoDLC::Season1...).
 #define _GNU_SOURCE
 #include <ctype.h>
 #include <dirent.h>
@@ -93,6 +99,8 @@ static int g_traced;
 #define MSG_ASSETFILE_STATUSBYID 0x5D955D38u
 #define MSG_LANGUAGEPACK_GETCURRENT 0x1F90F0D5u
 #define MSG_LANGUAGEPACK_SETCURRENT 0x5B4FBBE0u
+#define MSG_ASSETFILE_DOWNLOADBYID 0x2D008992u
+#define MSG_NOTIFICATION_DOWNLOADUPDATE 0x2FDD0CCDu
 
 #define MAXP 32
 #define PATHLEN 1024
@@ -206,6 +214,12 @@ DEFORIG(u64, AssetFileDownloadResult_GetAssetId, (const void *r), (r))
 DEFORIG(const char *, AssetFileDownloadResult_GetFilepath, (const void *r), (r))
 DEFORIG(u64, AssetFile_GetList, (void), ())
 DEFORIG(u64, AssetFile_StatusById, (u64 id), (id))
+DEFORIG(u64, AssetFile_DownloadById, (u64 id), (id))
+DEFORIG(void *, Message_GetAssetFileDownloadUpdate, (const void *m), (m))
+DEFORIG(u64, AssetFileDownloadUpdate_GetAssetFileId, (const void *u), (u))
+DEFORIG(u64, AssetFileDownloadUpdate_GetBytesTotal, (const void *u), (u))
+DEFORIG(long long, AssetFileDownloadUpdate_GetBytesTransferred, (const void *u), (u))
+DEFORIG(_Bool, AssetFileDownloadUpdate_GetCompleted, (const void *u), (u))
 DEFORIG(int, Error_GetCode, (const void *e), (e))
 DEFORIG(int, Error_GetHttpCode, (const void *e), (e))
 DEFORIG(const char *, Error_GetMessage, (const void *e), (e))
@@ -216,9 +230,12 @@ DEFORIG(const char *, Error_GetDisplayableMessage, (const void *e), (e))
  * ------------------------------------------------------------------------------------------------------------- */
 
 typedef struct {
-    char tag[48];
+    char tag[48];  // language packs: the BCP47 tag; content files: empty
+    char name[128];  // content files: the file name (the asset's name)
     char path[PATHLEN];
     u64 id;
+    long long size;
+    int content;
 } pack_t;
 
 static const struct {
@@ -263,8 +280,9 @@ static int valid_tag(const char *t) {
 
 static void add_pack(pack_t *out, int *n, const char *tag, const char *path) {
     for (int i = 0; i < *n; i++)
-        if (tag_eq(out[i].tag, tag)) return;  // first one wins
+        if (!out[i].content && tag_eq(out[i].tag, tag)) return;  // first one wins
     pack_t *p = &out[(*n)++];
+    memset(p, 0, sizeof *p);
     snprintf(p->tag, sizeof p->tag, "%s", tag);
     snprintf(p->path, sizeof p->path, "%s", path);
     p->id = hash_tag(tag);
@@ -272,6 +290,37 @@ static void add_pack(pack_t *out, int *n, const char *tag, const char *path) {
 
 static int g_logged_dirs;
 
+// frame.asset_files sets the byte after the marker to '1' (frameport.patches.frame.langpack.with_assets)
+#define ASSETS_MARK "@FPASSETS@"
+__attribute__((used)) static char g_assets_slot[sizeof ASSETS_MARK + 1] = ASSETS_MARK "0";
+
+static int assets_enabled(void) {
+    const char *env = getenv("FRAMEPORT_ASSET_FILES");
+    if (env && *env) return *env == '1';
+    return ((const volatile char *)g_assets_slot)[sizeof ASSETS_MARK - 1] == '1';
+}
+
+static u64 hash_name(const char *name) {
+    u64 h = 1469598103934665603ULL ^ 0x66;  // FNV-1a, seeded apart from the tags
+    for (const char *p = name; *p; p++) {
+        h ^= (unsigned char)((*p >= 'A' && *p <= 'Z') ? *p + 32 : *p);
+        h *= 1099511628211ULL;
+    }
+    return 0x4650000000000000ULL | (h & 0x0000FFFFFFFFFFFFULL);
+}
+
+static void add_content(pack_t *out, int *n, const char *name, const char *path, long long size) {
+    for (int i = 0; i < *n; i++)
+        if (out[i].content && strcasecmp(out[i].name, name) == 0) return;  // first one wins
+    pack_t *p = &out[(*n)++];
+    memset(p, 0, sizeof *p);
+    p->content = 1;
+    snprintf(p->name, sizeof p->name, "%.127s", name);  // (callers pass names shorter than 128)
+    snprintf(p->path, sizeof p->path, "%s", path);
+    p->size = size;
+    p->id = hash_name(name);
+}
+
 // Tags to leave out of the list (comma separated, case-insensitive): env FRAMEPORT_LANGPACK_SKIP, plus the lines
 // of a file "fp_langpack_skip" in any scanned folder. For finding out which pack a game needs reported: e.g. a game
 // whose built-in language works without being a "pack".
@@ -323,6 +372,9 @@ static void scan_dir(const char *dir, int depth, pack_t *out, int *n) {
                 memcpy(tag, e->d_name, len - 5);
                 tag[len - 5] = 0;
                 if (valid_tag(tag) && !skipped(tag)) add_pack(out, n, tag, path);
+            } else if (len > 4 && strcasecmp(e->d_name + len - 4, ".pak") == 0 && assets_enabled() &&
+                       strlen(e->d_name) < sizeof out[0].name) {
+                add_content(out, n, e->d_name, path, (long long)st.st_size);
             }
         }
     }
@@ -347,8 +399,10 @@ static int scan(pack_t *out) {
     static int last = -1;
     if (n != last) {
         last = n;
-        fplog("%d language pack(s) found", n);
-        for (int i = 0; i < n; i++) fplog("  pack %s -> %s", out[i].tag, out[i].path);
+        fplog("%d language pack(s) and content file(s) found", n);
+        for (int i = 0; i < n; i++)
+            fplog("  %s %s -> %s", out[i].content ? "content" : "pack", out[i].content ? out[i].name : out[i].tag,
+                  out[i].path);
     }
     g_logged_dirs = 1;
     return n;
@@ -390,10 +444,10 @@ static char g_current[48];  // tag the game applied with SetCurrent
 
 static int find_tag(const pack_t *p, int n, const char *tag) {
     for (int i = 0; i < n; i++)
-        if (tag_eq(p[i].tag, tag)) return i;
+        if (!p[i].content && tag_eq(p[i].tag, tag)) return i;
     int bl = base_len(tag);  // "de-DE" -> "de" (and the reverse: "de" asked, "de-de" present)
     for (int i = 0; i < n; i++)
-        if (base_len(p[i].tag) == bl && strncasecmp(p[i].tag, tag, (size_t)bl) == 0) return i;
+        if (!p[i].content && base_len(p[i].tag) == bl && strncasecmp(p[i].tag, tag, (size_t)bl) == 0) return i;
     return -1;
 }
 
@@ -411,7 +465,10 @@ static int pick_current(const pack_t *p, int n) {
         int i = find_tag(p, n, env);
         if (i >= 0) return i;
     }
-    return n == 1 ? 0 : -1;
+    int only = -1, langs = 0;
+    for (int i = 0; i < n; i++)
+        if (!p[i].content) only = i, langs++;
+    return langs == 1 ? only : -1;
 }
 
 /* ---------------------------------------------------------------------------------------------------------------
@@ -460,12 +517,19 @@ typedef struct {
     char msg[128];
 } err_t;
 
+typedef struct {
+    u64 id;
+    long long total, done;
+    int completed;
+} update_t;
+
 typedef struct msg {
     struct msg *all_next, *q_next;
     u32 type;
     u64 req;
-    int is_error, has_det, has_res;
+    int is_error, has_det, has_res, has_upd;
     err_t err;
+    update_t upd;
     details_t det;
     lang_t lng;
     result_t res;
@@ -525,6 +589,16 @@ static void fail(msg_t *m, int code, const char *text) {
 }
 
 static void fill_details(details_t *d, lang_t *l, const pack_t *p) {
+    if (p->content) {  // content that comes with the game: Meta's "default" asset type, nothing to buy
+        d->id = p->id;
+        snprintf(d->type, sizeof d->type, "default");
+        snprintf(d->status, sizeof d->status, "installed");
+        snprintf(d->iap, sizeof d->iap, "free");
+        snprintf(d->path, sizeof d->path, "%s", p->path);
+        d->meta[0] = 0;
+        d->lang = NULL;
+        return;
+    }
     d->id = p->id;
     snprintf(d->type, sizeof d->type, "language_pack");
     snprintf(d->status, sizeof d->status, "installed");
@@ -722,6 +796,35 @@ EXPORT u64 ovr_AssetFile_StatusById(u64 id) {
     return o_AssetFile_StatusById(id);
 }
 
+EXPORT u64 ovr_AssetFile_DownloadById(u64 id) {
+    fplog("AssetFile_DownloadById(%llu)%s", (unsigned long long)id, (id >> 48) == 0x4650 ? " (ours)" : "");
+    if ((id >> 48) != 0x4650) return o_AssetFile_DownloadById(id);
+    pack_t packs[MAXP];
+    int n = scan(packs), i = 0;
+    while (i < n && packs[i].id != id) i++;
+    msg_t *m = new_msg(MSG_ASSETFILE_DOWNLOADBYID, 0);
+    if (!m) return 0;
+    u64 req = m->req;
+    if (i == n) {
+        fail(m, 404, "asset file not found");
+        post(m);
+        return req;
+    }
+    // already on the device: a finished download update, then the result with the file's path
+    msg_t *u = new_msg(MSG_NOTIFICATION_DOWNLOADUPDATE, 0);
+    if (u) {
+        u->req = 0;  // notifications carry no request id
+        u->upd = (update_t){packs[i].id, packs[i].size, packs[i].size, 1};
+        u->has_upd = 1;
+        post(u);
+    }
+    m->res.id = packs[i].id;
+    snprintf(m->res.path, sizeof m->res.path, "%s", packs[i].path);
+    m->has_res = 1;
+    post(m);
+    return req;
+}
+
 /* ---------------------------------------------------------------------------------------------------------------
  * Message loop
  * ------------------------------------------------------------------------------------------------------------- */
@@ -813,6 +916,12 @@ EXPORT void *ovr_Message_GetAssetFileDownloadResult(const void *h) {
     return m->has_res ? (void *)&m->res : NULL;
 }
 
+EXPORT void *ovr_Message_GetAssetFileDownloadUpdate(const void *h) {
+    msg_t *m = owner(h);
+    if (!m) return o_Message_GetAssetFileDownloadUpdate(h);
+    return m->has_upd ? (void *)&m->upd : NULL;
+}
+
 EXPORT void *ovr_Message_GetAssetDetailsArray(const void *h) {
     msg_t *m = owner(h);
     if (!m) return o_Message_GetAssetDetailsArray(h);
@@ -903,6 +1012,19 @@ EXPORT const char *ovr_AssetFileDownloadResult_GetFilepath(const void *h) {
     return IS_OURS(h) ? ((const result_t *)h)->path : o_AssetFileDownloadResult_GetFilepath(h);
 }
 
+EXPORT u64 ovr_AssetFileDownloadUpdate_GetAssetFileId(const void *h) {
+    return IS_OURS(h) ? ((const update_t *)h)->id : o_AssetFileDownloadUpdate_GetAssetFileId(h);
+}
+EXPORT u64 ovr_AssetFileDownloadUpdate_GetBytesTotal(const void *h) {
+    return IS_OURS(h) ? (u64)((const update_t *)h)->total : o_AssetFileDownloadUpdate_GetBytesTotal(h);
+}
+EXPORT long long ovr_AssetFileDownloadUpdate_GetBytesTransferred(const void *h) {
+    return IS_OURS(h) ? ((const update_t *)h)->done : o_AssetFileDownloadUpdate_GetBytesTransferred(h);
+}
+EXPORT _Bool ovr_AssetFileDownloadUpdate_GetCompleted(const void *h) {
+    return IS_OURS(h) ? (_Bool)((const update_t *)h)->completed : o_AssetFileDownloadUpdate_GetCompleted(h);
+}
+
 EXPORT int ovr_Error_GetCode(const void *h) { return IS_OURS(h) ? ((const err_t *)h)->code : o_Error_GetCode(h); }
 EXPORT int ovr_Error_GetHttpCode(const void *h) { return IS_OURS(h) ? ((const err_t *)h)->http : o_Error_GetHttpCode(h); }
 EXPORT const char *ovr_Error_GetMessage(const void *h) {

native/ovrpshim/ovrpshim.c

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0-only
-// FramePort OVRPlugin frame-loop shim for Unity 2017-2018 built-in Oculus support.
+// FramePort OVRPlugin shim: the frame loop for Unity 2017-2018 built-in Oculus support, and Unity's user presence.
 //
 // That Unity drives OVRPlugin with the legacy frame loop: ovrp_Update2(render step, frame index, ...) on the main
 // thread, then ovrp_BeginFrame / ovrp_EndFrame on the render thread. It never calls ovrp_WaitToBeginFrame, which
@@ -9,10 +9,14 @@
 //
 // FramePort renames the "ovrp_Update2" lookup in libunity.so to "fpov_Update2" (same length) and adds this library to
 // libOVRPlugin.so's DT_NEEDED, so Unity's dlsym on the plugin finds this function: it waits for the frame first (once
-// per frame index, render step only), then calls the real ovrp_Update2.
+// per frame index, render step only), then calls the real ovrp_Update2 (render step; the physics step: see below).
 #include <android/log.h>
 #include <dlfcn.h>
 #include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
 
 #define TAG "FrameBridge"
 #define EXPORT __attribute__((visibility("default")))
@@ -25,28 +29,168 @@ static PFN_Update2 real_update2;
 static PFN_WaitToBeginFrame real_wait;
 static pthread_once_t once = PTHREAD_ONCE_INIT;
 
+// Per-game settings (the same sources as FrameBridge and the GL shim, later ones winning): the frame-begin gate and
+// the held-back physics update below were needed by Sniper Elite VR; in Unity 2019 games (BattleSisters) holding the
+// physics update back made the hands lag and the gate made loading screens stutter, so both are off unless the recipe
+// turns them on (ovrp_begin_gate=1, ovrp_hold_physics=1).
+static int begin_gate, hold_physics;
+
+static void read_conf_file(const char *path) {
+    FILE *f = fopen(path, "r");
+    if (!f) return;
+    char line[256];
+    while (fgets(line, sizeof(line), f)) {
+        if (!strncmp(line, "ovrp_begin_gate=", 16)) begin_gate = atoi(line + 16);
+        if (!strncmp(line, "ovrp_hold_physics=", 18)) hold_physics = atoi(line + 18);
+    }
+    fclose(f);
+}
+
+static void read_conf(void) {
+    Dl_info info;
+    char path[600];
+    if (dladdr((void *)read_conf, &info) && info.dli_fname) {
+        const char *slash = strrchr(info.dli_fname, '/');
+        if (slash && slash - info.dli_fname < 500) {
+            snprintf(path, sizeof(path), "%.*s/libframe_settings.so", (int)(slash - info.dli_fname), info.dli_fname);
+            read_conf_file(path);
+        }
+    }
+    char pkg[256] = {0};
+    FILE *f = fopen("/proc/self/cmdline", "r");
+    if (f) {
+        size_t n = fread(pkg, 1, sizeof(pkg) - 1, f);
+        fclose(f);
+        pkg[n] = 0;
+    }
+    char *colon = strchr(pkg, ':');
+    if (colon) *colon = 0;
+    if (*pkg && !strchr(pkg, '/')) {
+        snprintf(path, sizeof(path), "/sdcard/Android/data/%s/files/framebridge.conf", pkg);
+        read_conf_file(path);
+    }
+    const char *env = getenv("FRAMEBRIDGE_CONFIG");
+    if (env && *env) read_conf_file(env);
+}
+
 static void init(void) {
+    read_conf();
     void *ovrp = dlopen("libOVRPlugin.so", RTLD_NOW | RTLD_NOLOAD);
     if (!ovrp) ovrp = dlopen("libOVRPlugin.so", RTLD_NOW);
     if (ovrp) {
         real_update2 = (PFN_Update2)dlsym(ovrp, "ovrp_Update2");
         real_wait = (PFN_WaitToBeginFrame)dlsym(ovrp, "ovrp_WaitToBeginFrame");
     }
-    LOG("ovrp frame loop shim: ovrp_Update2 %s, ovrp_WaitToBeginFrame %s", real_update2 ? "OK" : "MISSING",
-        real_wait ? "OK" : "MISSING");
+    LOG("ovrp frame loop shim: ovrp_Update2 %s, ovrp_WaitToBeginFrame %s, begin gate %d, hold physics %d",
+        real_update2 ? "OK" : "MISSING", real_wait ? "OK" : "MISSING", begin_gate, hold_physics);
 }
 
 #define STEP_RENDER (-1)  // ovrpStep_Render
 
+static void mouse_click_frame(void);  // below: controller presses as Unity mouse clicks
+
+// xrWaitFrame blocks until the frame waited for before it has begun (xrBeginFrame). Unity begins frames on its render
+// thread, which sometimes skips one (scene activation) and then waits for the main thread: our next wait never
+// returned (Sniper Elite VR hung at its Init scene, main thread in SteamVR's CSxrSession::StartNextFrame, render
+// thread idle). FramePort also renames libunity.so's "ovrp_BeginFrame"/"ovrp_EndFrame" lookups to the functions below.
+// Once a begin has come through, the main thread first waits (≤ BEGIN_TIMEOUT_MS) for the last waited frame to begin
+// and skips this frame's wait if it doesn't (normally the render thread begins it within a frame: pacing unchanged).
+// OVRPlugin only begins the frame index it waited for (else "outside of frame bounds" and no xrBeginFrame, after which
+// the next wait blocked for good), so a begin of another index while a wait is outstanding becomes a begin of the
+// waited index, and the matching end follows it.
+#define BEGIN_TIMEOUT_MS 50
+static pthread_mutex_t begin_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t begin_cond = PTHREAD_COND_INITIALIZER;
+static int begin_hooked;     // fpov_BeginFrame has been called: the gate is armed
+static int outstanding = -1; // frame index waited for and not begun yet, else -1 (under begin_lock)
+static int remap_from = -1, remap_to = -1;  // the last begin that was given the waited index (for its end)
+
+static int last_wait_begun(int frame_index) {
+    if (!begin_gate) return 1;
+    pthread_mutex_lock(&begin_lock);
+    struct timespec until;
+    clock_gettime(CLOCK_REALTIME, &until);
+    until.tv_nsec += BEGIN_TIMEOUT_MS * 1000000L;
+    if (until.tv_nsec >= 1000000000L) until.tv_sec++, until.tv_nsec -= 1000000000L;
+    while (begin_hooked && outstanding >= 0)
+        if (pthread_cond_timedwait(&begin_cond, &begin_lock, &until)) break;
+    int ok = !begin_hooked || outstanding < 0;
+    if (ok) outstanding = frame_index;
+    pthread_mutex_unlock(&begin_lock);
+    return ok;
+}
+
+// Unity's physics step updates OVRPlugin's poses with prediction 0 ("now"). OVRPlugin takes "now" from the monotonic
+// clock, which is the XrTime base on a Quest but not on the Frame (its XrTime ran 0.05-0.9 s ahead), so it located
+// every node that much in the past (the runtime extrapolates backwards), and the render-step reads after it got those
+// poses too: the game's hands trailed the controllers by several centimetres whenever they moved (Sniper Elite VR). A
+// larger prediction doesn't reach (OVRPlugin caps it at ~0.07 s), so the physics update isn't passed on: OVRPlugin
+// keeps the render update's display-time poses for the whole frame (physics and render reads agree).
+#define STEP_PHYSICS 0
+
 EXPORT int fpov_Update2(int step, int frame_index, double prediction_seconds) {
     pthread_once(&once, init);
-    static int last_waited = -1, logged;
+    static int last_waited = -1, rendered, logged, skipped, last_result;
     if (step == STEP_RENDER && real_wait && frame_index != last_waited) {
         last_waited = frame_index;
-        int r = real_wait(frame_index);
-        if (logged++ < 3) LOG("ovrp frame loop shim: waited for frame %d: %d", frame_index, r);
+        if (last_wait_begun(frame_index)) {
+            int r = real_wait(frame_index);
+            if (logged++ < 3) LOG("ovrp frame loop shim: waited for frame %d: %d", frame_index, r);
+        } else if (skipped++ < 20 || skipped % 1000 == 0) {
+            LOG("ovrp frame loop shim: frame %d: the last waited frame wasn't begun within %d ms, not waiting "
+                "(%d times)", frame_index, BEGIN_TIMEOUT_MS, skipped);
+        }
+        mouse_click_frame();
     }
-    return real_update2 ? real_update2(step, frame_index, prediction_seconds) : -1000;  // ovrpFailure
+    if (hold_physics && step == STEP_PHYSICS && rendered) return last_result;  // see above: keeps the display-time poses
+    int r = real_update2 ? real_update2(step, frame_index, prediction_seconds) : -1000;  // ovrpFailure
+    if (step == STEP_RENDER) rendered = 1, last_result = r;
+    return r;
+}
+
+// Unity's legacy ovrp_BeginFrame(frameIndex) / ovrp_EndFrame(frameIndex) on the render thread; further arguments
+// (older plugins) are passed on as they are
+typedef int (*PFN_FrameCall)(long, long, long, long);
+
+static PFN_FrameCall ovrp_fn(const char *name) {
+    void *ovrp = dlopen("libOVRPlugin.so", RTLD_NOW | RTLD_NOLOAD);
+    PFN_FrameCall fn = ovrp ? (PFN_FrameCall)dlsym(ovrp, name) : 0;
+    LOG("ovrp frame loop shim: %s %s", name, fn ? "OK" : "MISSING");
+    return fn;
+}
+
+EXPORT int fpov_BeginFrame(long frame, long b, long c, long d) {
+    static PFN_FrameCall real;
+    static int logged;
+    pthread_once(&once, init);  // the settings (begin_gate) before the first begin
+    if (!real) real = ovrp_fn("ovrp_BeginFrame");
+    pthread_mutex_lock(&begin_lock);
+    long index = frame;
+    if (begin_gate && outstanding >= 0 && outstanding != (int)frame) {
+        index = outstanding;
+        remap_from = (int)frame, remap_to = outstanding;
+    } else {
+        remap_from = remap_to = -1;
+    }
+    pthread_mutex_unlock(&begin_lock);
+    int r = real ? real(index, b, c, d) : -1000;
+    if (index != frame && logged++ < 20)
+        LOG("ovrp frame loop shim: begin frame %ld as waited frame %ld: %d", frame, index, r);
+    pthread_mutex_lock(&begin_lock);
+    begin_hooked = 1;
+    outstanding = -1;  // the waited frame (if any) is begun now
+    pthread_cond_broadcast(&begin_cond);
+    pthread_mutex_unlock(&begin_lock);
+    return r;
+}
+
+EXPORT int fpov_EndFrame(long frame, long b, long c, long d) {
+    static PFN_FrameCall real;
+    if (!real) real = ovrp_fn("ovrp_EndFrame");
+    pthread_mutex_lock(&begin_lock);
+    if ((int)frame == remap_from) frame = remap_to;
+    pthread_mutex_unlock(&begin_lock);
+    return real ? real(frame, b, c, d) : -1000;
 }
 
 // ---------------------------------------------------------------- input diagnostics (pass-through)
@@ -116,7 +260,7 @@ static void note_state(const char *which, unsigned int mask, const State *s) {
     while (i < 8 && masks[i].seen && masks[i].mask != mask) i++;
     if (i == 8) return;
     if (!masks[i].seen || masks[i].buttons != s->words[1] || masks[i].connected != s->words[0]) {
-        if (changes++ < 120)
+        if (changes++ < 400)
             LOG("ovrp input: %s(mask 0x%x): connected 0x%x buttons 0x%x touches 0x%x%s", which, mask, s->words[0],
                 s->words[1], s->words[2], masks[i].seen ? "" : " (first call with this mask)");
         masks[i].seen = 1;
@@ -140,6 +284,22 @@ EXPORT int fpov_GetControllerState4(unsigned int mask, State *state) {
     pthread_once(&input_once, input_init);
     int r = real_state4 ? real_state4(mask, state) : -1000;
     if (state) {
+        // ovrpControllerState4 continues with 4 floats after the 4 masks: L/R IndexTrigger, L/R HandTrigger. OVRInput
+        // turns them into the trigger/grip buttons at 0.5; log each time one crosses it (per requested mask)
+        const float *axis = (const float *)((const char *)state + 16);
+        static struct { unsigned int mask, bits; } seen[8];
+        static int axis_logs;
+        unsigned int bits = 0;
+        for (int k = 0; k < 4; ++k) bits |= (axis[k] >= 0.5f) << k;
+        int i = 0;
+        while (i < 8 && seen[i].mask && seen[i].mask != mask) i++;
+        if (i < 8 && (!seen[i].mask || seen[i].bits != bits)) {
+            if (seen[i].mask && axis_logs++ < 200)
+                LOG("ovrp input: State4(mask 0x%x) triggers L %.2f R %.2f grips L %.2f R %.2f", mask, axis[0], axis[1],
+                    axis[2], axis[3]);
+            seen[i].mask = mask;
+            seen[i].bits = bits;
+        }
         note_state("State4", mask, state);
         state->words[1] = unstick(state->words[1]);
     }
@@ -193,3 +353,105 @@ EXPORT int fpov_GetAppHasInputFocus(int *has_focus) {
     if (has_focus) *has_focus = 1;
     return 0;  // ovrpSuccess
 }
+
+// ---------------------------------------------------------------- controller presses as mouse clicks
+// Unity 2017-2019 games made for Go/Gear VR-era input wait for Input.GetMouseButtonDown(0/1), which a Quest delivers
+// for the controller's primary press (Accounting+'s "press any button" motion warning checks only that). Lepton runs
+// VR apps without a focused Android window, so no touch/mouse event ever arrives. IL2CPP looks engine functions up by
+// name (il2cpp_resolve_icall) on first use: this registers a replacement for UnityEngine.Input::GetMouseButtonDown
+// that returns Unity's answer, or true in the frame a Touch trigger (>= 0.5) or A/B/X/Y is newly pressed.
+#define MOUSE_ICALL "UnityEngine.Input::GetMouseButtonDown(System.Int32)"
+typedef void (*PFN_AddICall)(const char *name, const void *fn);
+typedef const void *(*PFN_ResolveICall)(const char *name);
+typedef int (*PFN_MouseDown)(int button);
+static PFN_MouseDown real_mouse_down;
+static volatile int click_now;  // set for the frame in which a press began
+
+static int fp_mouse_down(int button) {
+    int real = real_mouse_down ? real_mouse_down(button) : 0;
+    return real || ((button == 0 || button == 1) && click_now);
+}
+
+static void mouse_install(void) {
+    static int tries;
+    if (real_mouse_down || tries > 600) return;  // ~10 s of frames
+    tries++;
+    PFN_AddICall add = (PFN_AddICall)dlsym(RTLD_DEFAULT, "il2cpp_add_internal_call");
+    PFN_ResolveICall resolve = (PFN_ResolveICall)dlsym(RTLD_DEFAULT, "il2cpp_resolve_icall");
+    if (!add || !resolve) {
+        void *il2cpp = dlopen("libil2cpp.so", RTLD_NOW | RTLD_NOLOAD);
+        if (il2cpp) {
+            add = (PFN_AddICall)dlsym(il2cpp, "il2cpp_add_internal_call");
+            resolve = (PFN_ResolveICall)dlsym(il2cpp, "il2cpp_resolve_icall");
+        }
+    }
+    if (!add || !resolve) return;
+    const void *current = resolve(MOUSE_ICALL);
+    if (!current) return;  // Unity hasn't registered its own yet: try again next frame
+    real_mouse_down = (PFN_MouseDown)current;
+    add(MOUSE_ICALL, (const void *)fp_mouse_down);
+    LOG("controller presses count as mouse clicks (%s %s)", MOUSE_ICALL,
+        resolve(MOUSE_ICALL) == (const void *)fp_mouse_down ? "replaced" : "NOT replaced");
+}
+
+static void mouse_click_frame(void) {
+    mouse_install();
+    pthread_once(&input_once, input_init);
+    static int was_pressed;
+    unsigned char raw[512] __attribute__((aligned(16))) = {0};  // ovrpControllerState4 (+ room for newer layouts)
+    int pressed = 0;
+    if (real_state4 && real_state4(0x3, (State *)raw) >= 0) {
+        const unsigned int *w = (const unsigned int *)raw;
+        const float *axis = (const float *)(raw + 16);  // L/R IndexTrigger, L/R HandTrigger
+        pressed = (w[1] & 0x303u) != 0 || axis[0] >= 0.5f || axis[1] >= 0.5f;  // A, B, X, Y or a trigger
+    }
+    click_now = pressed && !was_pressed;
+    was_pressed = pressed;
+}
+
+// ---------------------------------------------------------------- hand nodes
+// Unity's built-in Oculus XR input creates its left/right controller devices (InputDevices.GetDeviceAtXRNode, the
+// Touch buttons and triggers games read through CommonUsages) for the hand nodes OVRPlugin reports as present
+// (ovrp_GetNodePresent). Logged per node; a hand node whose Touch controller is connected counts as present.
+typedef int (*PFN_NodePresent)(int node);
+#define NODE_HAND_LEFT 3
+#define NODE_HAND_RIGHT 4
+
+EXPORT int fpov_GetNodePresent(int node) {
+    static PFN_NodePresent real;
+    static int logged[16];
+    pthread_once(&input_once, input_init);
+    if (!real) {
+        void *ovrp = dlopen("libOVRPlugin.so", RTLD_NOW | RTLD_NOLOAD);
+        if (ovrp) real = (PFN_NodePresent)dlsym(ovrp, "ovrp_GetNodePresent");
+    }
+    int present = real ? real(node) : 0, answer = present;
+    if (!present && (node == NODE_HAND_LEFT || node == NODE_HAND_RIGHT) && real_connected)
+        answer = (real_connected() & (node == NODE_HAND_LEFT ? 0x1u : 0x2u)) != 0;  // LTouch / RTouch
+    if (node >= 0 && node < 16 && logged[node] != (answer ? 2 : 1)) {
+        logged[node] = answer ? 2 : 1;
+        LOG("ovrp node %d present: OVRPlugin %d -> Unity %d", node, present, answer);
+    }
+    return answer;
+}
+
+// ---------------------------------------------------------------- user presence (patch frame.unity_user_presence)
+// Unity's Oculus XR Plugin gives its HMD input device a UserPresence feature from ovrp_GetUserPresent2. On the Frame
+// OVRPort's OVRPlugin answers "not worn" a few seconds after start while the headset is worn, and games that drive
+// their rig only while the user is present stay frozen (BONELAB's Marrow rig: XRHMD.IsUserPresent). The plugin's
+// lookup is renamed to this function, which reports the user as present and logs OVRPlugin's own answer on change.
+typedef int (*PFN_UserPresent2)(int *present);
+
+EXPORT int fpov_GetUserPresent2(int *present) {
+    static PFN_UserPresent2 real;
+    if (!real) {
+        void *ovrp = dlopen("libOVRPlugin.so", RTLD_NOW | RTLD_NOLOAD);
+        if (ovrp) real = (PFN_UserPresent2)dlsym(ovrp, "ovrp_GetUserPresent2");
+    }
+    int value = 0, r = real ? real(&value) : -1000;
+    static int last = -2, logged;
+    if ((r < 0 ? -1 : value) != last && logged++ < 20) LOG("user presence: OVRPlugin %d (result %d) -> 1", value, r);
+    last = r < 0 ? -1 : value;
+    if (present) *present = 1;
+    return 0;  // ovrpSuccess
+}

native/ovrtrace/ovrtrace.c

@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// FramePort Meta Platform SDK tracer (diagnostics, patch frame.ovr_trace): logs the game's ovr_* calls and the
+// messages that answer them, to find a request that never gets an answer (a game waiting forever, e.g. Vader
+// Immortal after its intro). Nothing is answered or changed here: every call goes to the real function.
+//
+// Wiring: this library is the first DT_NEEDED of the game's engine library, so the engine's ovr_* imports resolve to
+// the exports below. Each export is a tiny assembly stub that saves the argument registers (x0-x8, d0-d7), asks
+// trace_before() for the real function (dlsym on the platform loader's handle, which also finds the language-pack
+// library's functions when frame.langpacks is on), calls it with the original registers, then reports the result to
+// trace_after(). Signatures don't matter (functions with more than 8 integer arguments would; the Platform SDK has
+// none). Logcat tag fp_ovrtrace.
+//
+// What is logged: the first calls of every function (argument 0 and the result), every message ovr_PopMessage
+// returns (type, request id, error flag), and every 10 s the request ids no message has answered yet with the
+// function that made them ("request" = a function whose name says it starts one: the result is kept when it looks
+// like a request id and the function isn't an accessor).
+#define _GNU_SOURCE
+#include <android/log.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <string.h>
+#include <time.h>
+
+#define TAG "fp_ovrtrace"
+#define LOG(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__)
+
+static const char *const NAMES[] = {
+#define N(name) #name,
+#include "names.inc"
+#undef N
+};
+#define COUNT (sizeof(NAMES) / sizeof(NAMES[0]))
+
+static void *real_fn[COUNT];
+static int calls[COUNT];
+static int is_pop[COUNT], is_request[COUNT];
+static void *loader;
+static pthread_once_t once = PTHREAD_ONCE_INIT;
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+typedef uint32_t (*get_type_t)(const void *);
+typedef uint64_t (*get_id_t)(const void *);
+typedef _Bool (*is_error_t)(const void *);
+static get_type_t msg_type;
+static get_id_t msg_id;
+static is_error_t msg_error;
+
+#define PENDING 256
+static struct { uint64_t id; int fn; double t; } pending[PENDING];
+static double last_report;
+
+static double now(void) {
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    return ts.tv_sec + ts.tv_nsec * 1e-9;
+}
+
+// accessors read data out of handles; everything else that returns a 64-bit id starts a request
+static int looks_like_request(const char *n) {
+    static const char *const accessors[] = {"ovr_Message_", "Array_", "_Get", "_Is", "_Has", "_Create", "_Destroy",
+                                            "_Set", "_Free", "ovr_PopMessage", "ovr_Platform", "ovr_GetLoggedInUser",
+                                            "ovr_Error_", "Options_", "ovr_Voip_", "ovr_Net_", "ovr_Microphone_"};
+    for (size_t i = 0; i < sizeof(accessors) / sizeof(accessors[0]); ++i)
+        if (strstr(n, accessors[i])) return 0;
+    return 1;
+}
+
+static void init(void) {
+    loader = dlopen("libovrplatformloader.so", RTLD_NOW | RTLD_NOLOAD);
+    if (!loader) loader = dlopen("libovrplatformloader.so", RTLD_NOW);
+    for (size_t i = 0; i < COUNT; ++i) {
+        is_pop[i] = !strcmp(NAMES[i], "ovr_PopMessage");
+        is_request[i] = looks_like_request(NAMES[i]);
+        // "requests" whose names start with Get (e.g. ovr_User_GetLoggedInUser): Area_GetX with an upper-case X
+        const char *u = strchr(NAMES[i] + 4, '_');
+        if (u && !strncmp(u, "_Get", 4) && strncmp(NAMES[i], "ovr_Message_", 12) && !strstr(NAMES[i], "Array_"))
+            is_request[i] = 2;  // maybe: kept only when the result looks like a request id
+    }
+    if (loader) {
+        msg_type = (get_type_t)dlsym(loader, "ovr_Message_GetType");
+        msg_id = (get_id_t)dlsym(loader, "ovr_Message_GetRequestID");
+        msg_error = (is_error_t)dlsym(loader, "ovr_Message_IsError");
+    }
+    LOG("tracer active: %zu functions, platform loader %s", COUNT, loader ? "OK" : "MISSING");
+    last_report = now();
+}
+
+void *fp_trace_before(uint64_t idx, uint64_t arg0) __attribute__((visibility("hidden")));
+void *fp_trace_before(uint64_t idx, uint64_t arg0) {
+    pthread_once(&once, init);
+    if (idx >= COUNT) return NULL;
+    if (!real_fn[idx] && loader) real_fn[idx] = dlsym(loader, NAMES[idx]);
+    int n = __atomic_add_fetch(&calls[idx], 1, __ATOMIC_RELAXED);
+    if (n <= 3 && !is_pop[idx]) LOG("call %s(0x%llx)%s", NAMES[idx], (unsigned long long)arg0,
+                                    real_fn[idx] ? "" : " - not in the loader: returns 0");
+    return real_fn[idx];
+}
+
+static void report_pending(double t) {
+    int shown = 0;
+    for (int i = 0; i < PENDING; ++i) {
+        if (!pending[i].id) continue;
+        if (shown++ < 12)
+            LOG("unanswered after %.0f s: request %llu from %s", t - pending[i].t, (unsigned long long)pending[i].id,
+                NAMES[pending[i].fn]);
+    }
+    if (shown) LOG("%d request(s) without an answer", shown);
+}
+
+uint64_t fp_trace_after(uint64_t idx, uint64_t ret) __attribute__((visibility("hidden")));
+uint64_t fp_trace_after(uint64_t idx, uint64_t ret) {
+    if (idx >= COUNT) return ret;
+    double t = now();
+    pthread_mutex_lock(&lock);
+    if (is_pop[idx]) {
+        if (ret && msg_type && msg_id) {
+            const void *m = (const void *)(uintptr_t)ret;
+            uint64_t id = msg_id(m);
+            int answered = -1;
+            for (int i = 0; i < PENDING; ++i)
+                if (pending[i].id && pending[i].id == id) { answered = pending[i].fn; pending[i].id = 0; break; }
+            LOG("message type=0x%08x request=%llu error=%d%s%s", msg_type(m), (unsigned long long)id,
+                msg_error ? msg_error(m) : -1, answered >= 0 ? " answers " : "", answered >= 0 ? NAMES[answered] : "");
+        }
+    } else {
+        int n = calls[idx];
+        if (n <= 3) LOG("  %s -> 0x%llx", NAMES[idx], (unsigned long long)ret);
+        // request ids are small positive counters; pointers (handles) are large
+        if (is_request[idx] && ret && ret < (1ull << 40)) {
+            for (int i = 0; i < PENDING; ++i)
+                if (!pending[i].id) { pending[i].id = ret; pending[i].fn = (int)idx; pending[i].t = t; break; }
+            if (n <= 20) LOG("request %llu <- %s", (unsigned long long)ret, NAMES[idx]);
+        }
+    }
+    if (t - last_report >= 10.0) {
+        last_report = t;
+        report_pending(t);
+    }
+    pthread_mutex_unlock(&lock);
+    return ret;
+}
+
+// The shared stub: x16 = function index. Saves the argument registers, gets the real function, calls it with them,
+// reports the result. x8 (indirect result) and d0-d7 (float/HFA arguments) are preserved, x0/x1/d0-d3 returned.
+__asm__(
+    ".text\n"
+    ".p2align 2\n"
+    "fp_trace_common:\n"
+    "  stp x29, x30, [sp, #-224]!\n"
+    "  mov x29, sp\n"
+    "  stp x0, x1, [sp, #16]\n"
+    "  stp x2, x3, [sp, #32]\n"
+    "  stp x4, x5, [sp, #48]\n"
+    "  stp x6, x7, [sp, #64]\n"
+    "  stp d0, d1, [sp, #80]\n"
+    "  stp d2, d3, [sp, #96]\n"
+    "  stp d4, d5, [sp, #112]\n"
+    "  stp d6, d7, [sp, #128]\n"
+    "  stp x8, x16, [sp, #144]\n"
+    "  mov x0, x16\n"
+    "  ldr x1, [sp, #16]\n"
+    "  bl fp_trace_before\n"
+    "  str x0, [sp, #160]\n"
+    "  ldp x0, x1, [sp, #16]\n"
+    "  ldp x2, x3, [sp, #32]\n"
+    "  ldp x4, x5, [sp, #48]\n"
+    "  ldp x6, x7, [sp, #64]\n"
+    "  ldp d0, d1, [sp, #80]\n"
+    "  ldp d2, d3, [sp, #96]\n"
+    "  ldp d4, d5, [sp, #112]\n"
+    "  ldp d6, d7, [sp, #128]\n"
+    "  ldr x8, [sp, #144]\n"
+    "  ldr x17, [sp, #160]\n"
+    "  cbz x17, 1f\n"
+    "  blr x17\n"
+    "  b 2f\n"
+    "1:\n"
+    "  mov x0, #0\n"
+    "  mov x1, #0\n"
+    "  movi d0, #0\n"
+    "2:\n"
+    "  stp x0, x1, [sp, #16]\n"
+    "  stp d0, d1, [sp, #80]\n"
+    "  stp d2, d3, [sp, #96]\n"
+    "  ldr x0, [sp, #152]\n"
+    "  ldr x1, [sp, #16]\n"
+    "  bl fp_trace_after\n"
+    "  ldp x0, x1, [sp, #16]\n"
+    "  ldp d0, d1, [sp, #80]\n"
+    "  ldp d2, d3, [sp, #96]\n"
+    "  ldp x29, x30, [sp], #224\n"
+    "  ret\n");
+
+// one exported stub per name: x16 = its index
+#define STR2(x) #x
+#define STR(x) STR2(x)
+static const int dummy_index_base __attribute__((unused)) = 0;
+#define N(name)                                                    \
+    __asm__(".text\n.p2align 2\n.globl " #name "\n.type " #name ", %function\n" #name ":\n" \
+            "  mov x16, #" STR(__COUNTER__) "\n  b fp_trace_common\n");
+#include "names.inc"
+#undef N

native/venc/SPEC.md

@@ -0,0 +1,215 @@
+# fp_venc — specification
+
+A small program that runs **on the Steam Frame** (SteamOS, aarch64 Linux with glibc) and hardware-encodes the
+SteamVR "headset view" webcam to an H.264 elementary stream on stdout. FramePort's live view (PC side) pipes that
+stream into ffmpeg on the Frame, which adds sound and packs fragmented MP4. The program is used for **live viewing
+only**: low latency, constant bitrate, evenly spaced frames, a keyframe whenever the viewer side asks for one.
+
+Sources: the Linux kernel's V4L2 documentation (`Documentation/userspace-api/media/v4l/dev-encoder.rst` = the
+memory-to-memory stateful encoder interface, `ext-ctrls-codec.rst`, `buffer.rst`, `vidioc-*.rst`), the DRM KMS UAPI
+(`drm_mode.h`), and the facts measured on the Frame listed in "Measured facts". Nothing else.
+
+## Files
+- `native/venc/convert.h`, `convert.c` — the picture converter (pure computation, no syscalls). Must compile for
+  **aarch64** (NEON path + scalar path) **and x86_64** (scalar path only; used by the host unit test).
+- `native/venc/sys.h` (+ `.c` if wanted) — raw Linux aarch64 syscalls (`svc #0`), `_start`, `memcpy`/`memset`/`memmove`
+  (the compiler may emit calls to them), small string/number helpers (parse decimal, print decimal, write a whole buffer).
+- `native/venc/fp_venc.c` — command line, source, encoder, DRM refresh query, main loop.
+- `native/venc/include/sys/time.h` — minimal stub so the kernel UAPI `linux/videodev2.h` compiles without a libc
+  (`struct timeval { long tv_sec; long tv_usec; };` and whatever else that header needs).
+- `native/build.py` — a `build_venc(tc)` step (see "Build").
+
+Keep it small and readable: plain C11, no clever macros, comments that explain *why*. Target ≤ ~900 lines total.
+
+## Build
+No libc exists at build time (the toolchain is the Android NDK's clang; its sysroot is bionic). The program is a fully
+static, freestanding executable:
+
+```
+clang --target=aarch64-linux-gnu -ffreestanding -nostdlib -nostdlibinc -static -fno-stack-protector
+      -fno-builtin -O2 -Wall -Wextra -Werror -fuse-ld=lld -Wl,--build-id=none -Wl,-z,max-page-size=65536
+      -e _start -I native/venc/include -I <uapi> -ffile-prefix-map=<native dir>=native
+      fp_venc.c convert.c [sys.c] -o artifacts/linux-arm64-bin/fp_venc
+```
+- `<uapi>`: a staging directory made by build.py under `native/.cache/uapi-arm64/` containing **only** copies of the
+  NDK sysroot's kernel UAPI folders `usr/include/linux`, `usr/include/asm-generic`, `usr/include/drm` and
+  `usr/include/aarch64-linux-android/asm` (as `asm/`). Never put the bionic libc headers on the include path.
+- `stdint.h`, `stddef.h`, `stdbool.h` and `arm_neon.h` come from clang's own resource directory (allowed).
+- Floating point is allowed but not needed; prefer integer math.
+- Add `venc` to build.py's `--only` default list, the docstring, the `steps` dict and the ordered build tuple (last).
+  The step creates `artifacts/linux-arm64-bin/` itself (not `linux-arm64/`: that folder is uploaded whole as the OpenXR layer). `write_sums()` then lists the new file.
+- The binary must be reproducible (same source → same bytes) and contain no local paths.
+
+## Command line
+```
+fp_venc [--height N] [--bitrate BPS] [--peak BPS] [--fps N] [--max-fps N] [--gop-seconds N]
+        [--source PATH] [--encoder PATH] [--probe | --selftest]
+```
+- `--height N`: output height, scaled **down** only. Default: the source height. See "Output size".
+- `--bitrate BPS`: target bitrate in bit/s. Default 3000000.
+- `--peak BPS`: above the bitrate = VBR capped at this peak (the live view uses 1.5×), else CBR.
+- `--fps N`: output frame rate; overrides the automatic choice.
+- `--max-fps N`: cap for the automatic choice. Default 45.
+- `--gop-seconds N`: keyframe interval in seconds. Default 4.
+- `--source PATH`: V4L2 capture device. Default: the `/dev/videoN` whose `/sys/class/video4linux/videoN/name` is
+  exactly `SteamVR` (strip the trailing newline).
+- `--encoder PATH`: the encoder node. Default: `/dev/video-enc0` if it exists, else the first
+  `/sys/class/video4linux/videoN` whose `name` contains `encoder` and that passes the capability check below.
+- `--probe`: do every setup step up to and including buffer allocation (no STREAMON, no frames), print the info JSON
+  (below) on **stdout**, exit.
+- `--selftest`: run the converter self-test (below) and exit. Needs no devices.
+
+Exit codes: 0 ok · 1 self-test failed / runtime error after streaming started · 2 bad arguments · 3 no source
+device · 4 hardware encoder not usable (missing, wrong caps, a required format refused, any setup ioctl failed).
+When the environment variable `FP_VENC_DISABLE=1` is set, setup fails with exit 4 (used to test the fallback).
+The environment is on the stack after argv (`_start`: `argc` at `[sp]`, `argv` at `sp+8`, `envp` after argv's NULL).
+
+### Info JSON
+One line, keys in this order, no spaces:
+`{"encoder":"/dev/video23","source":"/dev/video99","src":[1920,1080],"out":[1280,720],"refresh":96,"fps":32,"bitrate":3000000}`
+`refresh` is the panel rate in whole Hz (0 when unknown). In normal (streaming) mode the same line is written to
+**stderr** right after setup, prefixed `fp_venc: info ` — the PC side reads it for its status line.
+
+## Frame rate
+1. Read the panel's current refresh rate through DRM (read-only, no master needed; `/dev/dri/card0` is mode 0666 on
+   the Frame): open `/dev/dri/card0` (`O_RDWR|O_CLOEXEC`), `DRM_IOCTL_MODE_GETRESOURCES` once for the counts and
+   once more with an array for the CRTC ids, then `DRM_IOCTL_MODE_GETCRTC` for each. Among CRTCs with `mode_valid`,
+   take the one with the largest `hdisplay × vdisplay`. Rate in milli-Hz = `clock(kHz) × 1 000 000 / (htotal × vtotal)`;
+   round to whole Hz. Any failure → refresh unknown.
+2. `fps` = `--fps` if given; else if the refresh is known: `refresh / ceil(refresh / max_fps)` (integer division,
+   rounded to nearest): 72→36, 80→40, 90→45, 96→32, 108→36, 120→40, 144→36; else 30.
+Rationale: frames on an even grid of the panel's refresh look smooth; 30 fps on a 72/96 Hz panel judders.
+
+## Output size
+`out_h = min(--height or src_h, src_h)`, rounded **down** to even. `out_w = floor(src_w × out_h / src_h)` rounded down
+to even. Both ≥ 2. (1920×1080 → 360: 640×360; 480: 852×480; 720: 1280×720; 1080: 1920×1080.)
+
+## Converter (`convert.h`)
+```c
+#include <stdint.h>
+#include <stddef.h>
+void   fp_out_size(int src_w, int src_h, int max_h, int *out_w, int *out_h);   /* rule above; max_h <= 0 = src_h */
+size_t fp_scratch_size(int src_w, int src_h, int out_w, int out_h);           /* bytes of scratch fp_convert needs */
+/* RGB24 (R,G,B bytes) → NV12 (BT.709, limited range). Writes out_w×out_h luma and out_w×out_h/2 interleaved CbCr. */
+void   fp_convert_scalar(const uint8_t *src, int src_w, int src_h, int src_stride,
+                         uint8_t *y, int y_stride, uint8_t *uv, int uv_stride,
+                         int out_w, int out_h, void *scratch);
+void   fp_convert(/* same parameters */);   /* NEON on aarch64; identical to fp_convert_scalar elsewhere */
+```
+Both functions must produce **bit-identical** output; the exact definition is:
+
+1. **Scaling (box average).** For output column `i` the source columns are `[x0, x1)` with
+   `x0 = i·src_w / out_w`, `x1 = (i+1)·src_w / out_w` (integer division); rows likewise with `src_h/out_h`. Each
+   channel of output pixel (i, j) is `(S + n/2) / n` (integer division), `S` = sum of that channel over the block,
+   `n` = block width × block height. When the size is unchanged this is the identity.
+2. **Luma** from each scaled pixel (R, G, B):
+   `Y = 16 + ((47·R + 157·G + 16·B + 128) >> 8)`.
+3. **Chroma** per 2×2 block of scaled pixels: first average each channel, `C = (c00 + c01 + c10 + c11 + 2) >> 2`,
+   then `Cb = 128 + ((−26·R − 86·G + 112·B + 128) >> 8)`, `Cr = 128 + ((112·R − 102·G − 10·B + 128) >> 8)`
+   (`>>` on a signed 32-bit value = floor division by 256). Write Cb then Cr.
+4. Clamp Y to [16, 235] and Cb/Cr to [16, 240] (the formulas already stay inside; clamp anyway).
+The input is sRGB-encoded full-range RGB; no linearisation (video expects gamma-encoded values).
+
+**Performance:** at 1920×1080 → 1920×1080 the aarch64 `fp_convert` should take ≤ 4 ms per frame on one core; scaled
+outputs not more. Suggested shape (free to differ if output stays identical): NEON vertical accumulation of the rows of
+each output row into a uint16/uint32 row buffer, horizontal block sums + division (a per-block-size reciprocal table is
+fine only if it is exact for every possible sum; otherwise divide), NEON colour conversion with `vld3`/widening
+multiplies. The identity size gets a direct NEON path (no box step). Exact 3:2 and 3:1 ratios (720p and 360p from
+1080p) get their own NEON paths: the boxes repeat every 3 source pixels (widths 1,2 resp. 3), so the averages are
+rounding shifts / an exact multiply (×7282 >> 16 = ÷9 for every possible sum). The self-test covers them, including
+columns left over after the 48-pixel steps (1158×648 → 432/216).
+
+### Self-test (`--selftest`)
+Deterministic synthetic images (a 32-bit LCG noise image, a horizontal gradient, solid black/white/red/green/blue,
+a 1-pixel checkerboard) at source sizes 1920×1080, 1922×1080, 333×201 and 64×64, each converted for max heights
+{source height, 720, 480, 360, 100} where ≤ source height. `fp_convert` must equal `fp_convert_scalar` byte for byte
+(Y and UV planes, using strides larger than the width to catch stride bugs). Print `fp_venc: selftest ok (N cases)` or
+the first mismatch (size, plane, x, y, both values) on stderr; exit 0/1. Also time 50 conversions 1920×1080→1080 and
+→720 and print the average ms each.
+
+## Source (V4L2 capture, `/dev/video99`)
+v4l2loopback device written by SteamVR's `v4l2cam` (single-planar `V4L2_BUF_TYPE_VIDEO_CAPTURE`).
+- Open `O_RDWR|O_NONBLOCK|O_CLOEXEC`. `VIDIOC_QUERYCAP`: needs `V4L2_CAP_VIDEO_CAPTURE` + `V4L2_CAP_STREAMING`
+  (check `device_caps` when `V4L2_CAP_DEVICE_CAPS` is set). `VIDIOC_G_FMT`: pixelformat must be `V4L2_PIX_FMT_RGB24`
+  (else exit 4); use its width, height and `bytesperline` (0 → width×3).
+- `VIDIOC_REQBUFS` 3 × `V4L2_MEMORY_MMAP`, `VIDIOC_QUERYBUF` + `mmap(PROT_READ, MAP_SHARED)` each, `VIDIOC_QBUF` all,
+  `VIDIOC_STREAMON`.
+- At most one dequeued buffer is held (the newest frame). When a newer one is dequeued, re-queue the held one first.
+  Drain all ready buffers on each wake-up so the held one is always the newest.
+
+## Encoder (V4L2 memory-to-memory, multi-planar)
+Follow the "Initialization" and "Encoding" sections of `dev-encoder.rst`:
+1. Open `O_RDWR|O_NONBLOCK|O_CLOEXEC`. `VIDIOC_QUERYCAP`: needs `V4L2_CAP_VIDEO_M2M_MPLANE` and
+   `V4L2_CAP_STREAMING` (in `device_caps`).
+2. **Coded format first** — `VIDIOC_S_FMT` on `V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`: `pixelformat = V4L2_PIX_FMT_H264`,
+   width/height = out size, `num_planes = 1`. Must come back as H264 (else exit 4). Its `sizeimage` is the size of
+   the encoded-frame buffers.
+3. **Raw format** — `VIDIOC_S_FMT` on `V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`: `V4L2_PIX_FMT_NV12`, out size,
+   `num_planes = 1`, `colorspace = V4L2_COLORSPACE_REC709`, `ycbcr_enc = V4L2_YCBCR_ENC_709`,
+   `quantization = V4L2_QUANTIZATION_LIM_RANGE`, `xfer_func = V4L2_XFER_FUNC_709`. Use what comes back:
+   `num_planes` must be 1 (else exit 4); `stride = plane_fmt[0].bytesperline`; the returned `height` is the padded
+   height `H'`; the CbCr plane starts at `stride × H'` inside the same buffer; require
+   `stride × H' × 3/2 ≤ plane_fmt[0].sizeimage` and `stride ≥ out_w` (else exit 4).
+4. **Visible rectangle** — `VIDIOC_S_SELECTION` (type `V4L2_BUF_TYPE_VIDEO_OUTPUT`, target `V4L2_SEL_TGT_CROP`,
+   rect 0,0,out_w,out_h). If the driver rejects the single-planar type, retry with the `_MPLANE` type. Failure is only
+   a warning when `G_SELECTION` already reports that rectangle.
+5. **Frame rate** — `VIDIOC_S_PARM` on the OUTPUT queue: `timeperframe = 1/fps` (warning on failure).
+6. **Controls** — `VIDIOC_S_EXT_CTRLS` (or `VIDIOC_S_CTRL` one by one), each best-effort: a refused control prints
+   `fp_venc: warning: <name> refused (<errno>)` and continues:
+   - `V4L2_CID_MPEG_VIDEO_H264_PROFILE` = HIGH; `V4L2_CID_MPEG_VIDEO_H264_LEVEL` = the lowest level whose limits
+     (H.264 Table A-1: MaxFS macroblocks per frame, MaxMBPS macroblocks per second, MaxBR ×1.25 for High in kbit/s)
+     fit out size × fps × bitrate, among 3.1, 3.2, 4, 4.1, 4.2, 5, 5.1, 5.2;
+   - `V4L2_CID_MPEG_VIDEO_BITRATE_MODE` = CBR; `V4L2_CID_MPEG_VIDEO_BITRATE` = bitrate;
+     `V4L2_CID_MPEG_VIDEO_BITRATE_PEAK` = bitrate; `V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE` = 1;
+   - `V4L2_CID_MPEG_VIDEO_B_FRAMES` = 0; `V4L2_CID_MPEG_VIDEO_GOP_SIZE` = fps × gop_seconds;
+   - `V4L2_CID_MPEG_VIDEO_HEADER_MODE` = JOINED_WITH_1ST_FRAME; `V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR` = 1
+     (every keyframe is decodable on its own — a viewer may join at any keyframe);
+   - `V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE` = DISABLED (one output frame per input frame: the PC side derives
+     timestamps from the frame count).
+7. **Buffers** — `VIDIOC_REQBUFS` OUTPUT_MPLANE 4 × MMAP and CAPTURE_MPLANE 4 × MMAP; `VIDIOC_QUERYBUF` + `mmap` every
+   buffer (OUTPUT: read/write, fill with Y=16/CbCr=128 once so padding rows are defined; CAPTURE: read).
+   (`--probe` stops here: print the JSON, exit 0.)
+8. Queue all CAPTURE buffers, `VIDIOC_STREAMON` both queues.
+9. Per frame: write NV12 into a free OUTPUT buffer (`bytesused` = sizeimage), `VIDIOC_QBUF`. Dequeue finished OUTPUT
+   buffers (they become free). Dequeue CAPTURE buffers: write `bytesused − data_offset` bytes from
+   `mem + data_offset` to stdout, re-queue. `V4L2_BUF_FLAG_ERROR` on a capture buffer: re-queue, count, don't write.
+   `V4L2_BUF_FLAG_LAST`: the encoder is drained.
+10. **Keyframe on request** — set `V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME` (button) just before queuing the next frame.
+11. **Stop** — `VIDIOC_ENCODER_CMD` `V4L2_ENC_CMD_STOP`, keep dequeuing/writing CAPTURE buffers until one has
+    `V4L2_BUF_FLAG_LAST` (or 1 s passes), `VIDIOC_STREAMOFF` both queues, close, exit 0.
+
+## Main loop and timing
+- Ignore `SIGPIPE` (`rt_sigaction` with `SIG_IGN`; no restorer needed for SIG_IGN) so a closed stdout is an `EPIPE`
+  error → stop quietly (exit 0).
+- **stdin protocol** (stdin is the SSH channel; non-blocking reads after `poll`): byte `k` = request a keyframe;
+  byte `q` or end of file = stop (step 11); other bytes ignored.
+- **Fixed frame grid.** `t0` = `CLOCK_MONOTONIC` when streaming starts; slot `n` is due at `t0 + n·10⁹/fps` ns.
+  Exactly **one** frame is queued per slot, always: at slot time, convert the held (newest) source frame — even if it
+  was already used, e.g. while the headset is in standby the source delivers ~1 fps — so the stream's frame count
+  always equals elapsed time × fps. The ffmpeg side relies on that (`-framerate fps`, no timestamps in the stream).
+  Before the first source frame arrives, submit black frames (Y=16, CbCr=128).
+- If no OUTPUT buffer is free at slot time, wait for one (it's the encoder's latency; normal is a few ms). If the loop
+  falls behind (several slots due), submit the missed slots back to back with the same picture. If more than `fps`
+  slots (1 s) are missed at once (e.g. the process was stopped), log it, skip forward to the current slot and continue.
+- Wait with `ppoll` on: source fd (POLLIN), encoder fd (POLLIN = capture ready, POLLOUT = output buffer done),
+  stdin (POLLIN|POLLHUP), timeout = time to the next slot.
+- stdout writes are blocking writes of whole packets (loop over partial writes; `EINTR`/`EAGAIN` retry).
+- Every 10 s print one stderr line: `fp_venc: stats frames=<n> repeats=<frames that reused an already-sent picture>
+  late=<slots submitted late> skipped=<slots skipped> kbps=<average output bitrate>`.
+- All stderr lines start with `fp_venc: `. No output on stdout except the H.264 stream (or the probe JSON).
+
+## Measured facts (the Frame, SteamOS 0.3.0 kernel 6.18, 2026-10-07)
+- Encoder: `/dev/video23` (`/dev/video-enc0` → it), name `qcom-iris-encoder`, driver `iris_driver`, caps
+  M2M multiplanar + streaming. OUTPUT formats: Q08C, NV12, NV21, AB24, QC24. CAPTURE formats: H264, HEVC. Frame sizes
+  128×128 … 8192×8192 step 1. The `steamos` user can open it (group `video`).
+- NV12 S_FMT results (stride / returned height / sizeimage): 640×360 → 640/384/368640; 854×480 → 896/480/647168;
+  1280×720 → 1280/736/1413120; 1920×1080 → 1920/1088/3133440. Default OUTPUT crop = the requested size.
+- Controls present: B_FRAMES (0–7), GOP_SIZE, BITRATE_MODE (VBR, CBR), BITRATE / BITRATE_PEAK (≤ 245 000 000),
+  FRAME_RC_ENABLE, HEADER_MODE (separate, joined with 1st frame), FORCE_KEY_FRAME, H264 PROFILE (Baseline, Constrained
+  Baseline, Main, High, Constrained High), H264 LEVEL (1 … 6.0, default 5), PREPEND_SPSPPS_TO_IDR, FRAME_SKIP_MODE,
+  H264 entropy (CABAC default), I/P QP ranges, intra-refresh period, LTR, hierarchical coding.
+- Source: `/dev/video99`, v4l2loopback, name `SteamVR`, single-planar capture, RGB24 only, 1920×1080, bytesperline
+  5760, advertised 30 fps but frames come at the panel rate when worn, ~1.1 fps in standby.
+- DRM: `/dev/dri/card0` (msm, mode 0666); one active CRTC 4320×2160 (`2*2160x2160_96`, clock 1402720 kHz,
+  htotal 4448, vtotal 3285 → 96.00 Hz). The panel offers 72/80/90/96/108/120/144 Hz.
+- ffmpeg's stock `h264_v4l2m2m` hangs on this encoder; that's why this program exists.