Merge main into vr-apks: VR installs report through install_hooks like every other install

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.github/workflows/checks.yml

@@ -35,7 +35,9 @@ jobs:
       - name: Server tests
         run: python -m unittest discover -s tests -v
       - name: App syntax
-        run: node --check app/main.js && node --check app/build/make-icon.js && node --check app/build/fetch-deps.js && node --check app/preload.js && node --check app/install-link.js
+        run: node --check app/main.js && node --check app/build/make-icon.js && node --check app/build/fetch-deps.js && node --check app/preload.js && node --check app/install-link.js && node --check app/updater.js
+      - name: Updater tests
+        run: node --test app/test/updater.test.js
       - name: Website
         run: node --test site/test/*.test.mjs && node --check site/public/js/site.js && node --check site/public/js/feedback.js
 

README.md

@@ -107,6 +107,10 @@ already ships (sideloading a game copies Valve's own devkit scripts to
 a computer. Build it from [`ios/`](ios) in Xcode; see [docs/iphone.md](docs/iphone.md).
 
 The app brings its own Python and `adb`; SSH is built into macOS and Windows.
+From 0.4 it updates itself: when a new version is published, a banner offers
+**Update and restart**. It sends anonymous usage statistics, which you can turn
+off. Sharing compatibility results and error details is opt-in. See
+[docs/privacy.md](docs/privacy.md).
 Google doesn't publish `adb` for arm64 Linux, so that build uses your
 distribution's. If you already have `adb`, the app uses yours.
 
@@ -175,9 +179,11 @@ entry to `~/.ssh/config` and keys at `~/.ssh/id_ed25519_frame` and
 ## Feedback
 
 This is a first public test, so reports are really useful, especially from
-Windows and Linux. The quickest way is the
-[feedback form](https://frame-control.pages.dev/feedback/): no GitHub account
-needed, and it opens an issue here. Please include:
+Windows and Linux. The quickest way is **Report a problem** in the app (the
+warning-sign button at the top, or **Help → Report a Problem…**). It adds
+diagnostics with personal details removed, shows you exactly what's included,
+and sends it privately to the maintainer; nothing is published. Without the app,
+use the [feedback form](https://frame-control.pages.dev/feedback/). Please include:
 
 - what you tried and what happened
 - your computer's OS and your SteamOS build (Steam Settings → System)
@@ -238,7 +244,8 @@ cd app && npm install && npm start      # run the app from the checkout
 
 The server is Python stdlib only; the app is Electron. GitHub Actions runs the
 tests on macOS, Windows and Linux, and a `v*` tag builds all three installers
-into the release. See [building](docs/frame-control.md#building).
+into a draft release, which reaches users once published. See
+[building](docs/frame-control.md#building) and [releasing](docs/releasing.md).
 
 ## License
 

app/main.js

@@ -10,6 +10,7 @@ const net = require("net");
 const os = require("os");
 const path = require("path");
 const { SCHEME, parseInstallLink, linkFromArgv } = require("./install-link");
+const updater = require("./updater");
 
 const run = promisify(execFile);
 
@@ -114,7 +115,11 @@ function ping(target) {
 }
 
 async function startServer() {
+  // The version and whether this is a built app go to ui/frame_telemetry.py, which
+  // sends nothing from a source checkout.
   const env = { ...process.env, PATH: await loginPath(), FRAME_CONTROL_APP: "1",
+                FRAME_CONTROL_VERSION: app.getVersion(), FRAME_CONTROL_LOG: LOG,
+                ...(app.isPackaged ? { FRAME_CONTROL_PACKAGED: "1" } : {}),
                 ...(fs.existsSync(TOOLS) ? { FRAME_CONTROL_TOOLS: TOOLS } : {}) };
   python = await findPython(env);
   if (!python) throw new Error(`Frame Control needs Python 3.8 or later. ${PYTHON_HELP}`);
@@ -244,6 +249,9 @@ function fromUi(e) {
 
 ipcMain.handle("clipboard:read", (e) => fromUi(e) ? clipboard.readText() : "");
 ipcMain.handle("connection:setup", (e) => { if (fromUi(e)) setUpConnection(); });
+ipcMain.handle("update:get", (e) => fromUi(e) ? publicUpdate() : null);
+ipcMain.handle("update:check", (e) => fromUi(e) ? checkForUpdate({ manual: true }).then(publicUpdate) : null);
+ipcMain.handle("update:install", (e) => { if (fromUi(e)) installUpdate(); });
 
 // frame-control://install links from websites (docs/web-install.md). They can
 // arrive before the window or server exists (macOS open-url on a cold launch),
@@ -276,6 +284,81 @@ ipcMain.on("install-link:ready", (e) => {
   deliverLinks();
 });
 
+// ---- updates (app/updater.js, docs/releasing.md) ----
+// Checked shortly after launch and every few hours; the page shows a banner and
+// the Update button calls installUpdate.
+const UPDATE_EVERY = 6 * 3600 * 1000;
+const update = { status: "idle", current: app.getVersion(), latest: null, error: null, progress: 0, how: null };
+
+function publicUpdate() {
+  const r = update.latest;
+  return { status: update.status, current: update.current, error: update.error, progress: update.progress,
+           latest: r && { version: r.version, notes: r.notes, page: r.page },
+           canInstall: !!update.how && update.how.method !== "manual", why: update.how && update.how.why };
+}
+
+function setUpdate(fields) {
+  Object.assign(update, fields);
+  if (win && linkPage === win.webContents) win.webContents.send("update:state", publicUpdate());
+}
+
+async function checkForUpdate({ manual = false } = {}) {
+  if (["checking", "downloading", "ready"].includes(update.status)) return;
+  setUpdate({ status: "checking", error: null });
+  try {
+    const latest = await updater.latestRelease();
+    const how = updater.updateMethod({ platform: process.platform, isPackaged: app.isPackaged,
+                                       execPath: process.execPath, env: process.env,
+                                       exists: fs.existsSync, writable: updater.writable });
+    if (updater.isNewer(latest.version, update.current)) {
+      setUpdate({ status: "available", latest, how });
+      if (manual) offerUpdateDialog();
+    } else {
+      setUpdate({ status: "none", latest, how });
+      if (manual) dialog.showMessageBox(win, { type: "info", message: "Frame Control is up to date",
+                                               detail: `You have ${update.current}, the newest version.` });
+    }
+  } catch (e) {
+    // A failed check: nothing to install, and never an older release kept from before.
+    setUpdate({ status: "check-failed", error: e.message, latest: null });
+    if (manual) dialog.showMessageBox(win, { type: "warning", message: "Couldn't check for updates", detail: e.message });
+  }
+}
+
+async function offerUpdateDialog() {
+  const r = update.latest;
+  const { response } = await dialog.showMessageBox(win, {
+    type: "info", message: `Frame Control ${r.version} is available`,
+    detail: `You have ${update.current}.` + (update.how.method === "manual" ? ` Download it from the release page (${update.how.why}).` : ""),
+    buttons: [update.how.method === "manual" ? "Open Release Page" : "Update and Restart", "Later"], defaultId: 0, cancelId: 1,
+  });
+  if (response === 0) installUpdate();
+}
+
+async function installUpdate() {
+  // "error" here only ever means an install failed, so trying again is safe.
+  if (update.status !== "available" && update.status !== "error") return;
+  if (!update.latest || !updater.isNewer(update.latest.version, update.current)) return;
+  if (!update.how || update.how.method === "manual") { shell.openExternal(update.latest.page); return; }
+  setUpdate({ status: "downloading", progress: 0, error: null });
+  try {
+    const start = await updater.prepare(update.latest, update.how,
+      (done, total) => { if (total) setUpdate({ progress: done / total }); }, update.current);
+    setUpdate({ status: "ready", progress: 1 });
+    start();
+    quitting = true;
+    app.quit();
+  } catch (e) {
+    setUpdate({ status: "error", error: e.message });
+  }
+}
+
+function scheduleUpdateChecks() {
+  if (process.env.FRAME_CONTROL_NO_UPDATE_CHECK === "1") return;
+  setTimeout(checkForUpdate, 8000);
+  setInterval(checkForUpdate, UPDATE_EVERY).unref();
+}
+
 function registerScheme() {
   // A checkout runs as `electron .`, so the OS must be told the script too.
   // (macOS takes the scheme from Info.plist, which only the built app has.)
@@ -337,7 +420,11 @@ async function setUpConnection() {
 
 function buildMenu() {
   const template = [
-    ...(IS_MAC ? [{ role: "appMenu" }] : []),
+    ...(IS_MAC ? [{ label: app.name, submenu: [
+      { role: "about" }, { label: "Check for Updates…", click: () => checkForUpdate({ manual: true }) },
+      { type: "separator" }, { role: "services" }, { type: "separator" },
+      { role: "hide" }, { role: "hideOthers" }, { role: "unhide" }, { type: "separator" }, { role: "quit" },
+    ] }] : []),
     { role: "fileMenu" },
     { role: "editMenu" },
     {
@@ -364,7 +451,15 @@ function buildMenu() {
     ...(IS_MAC ? [{ role: "windowMenu" }] : []),
     {
       role: "help",
-      submenu: [{ label: "Project on GitHub", click: () => shell.openExternal("https://github.com/saphid/steam-frame") }],
+      submenu: [
+        ...(IS_MAC ? [] : [{ label: "Check for Updates…", click: () => checkForUpdate({ manual: true }) }]),
+        { label: "Report a Problem…", click: () => {
+          if (win && url && linkPage === win.webContents) win.webContents.send("report:open");
+          else shell.openExternal("https://frame-control.pages.dev/feedback/");  // the page isn't up
+        } },
+        { label: "Release Notes", click: () => shell.openExternal(updater.RELEASES) },
+        { label: "Project on GitHub", click: () => shell.openExternal("https://github.com/saphid/steam-frame") },
+      ],
     },
   ];
   Menu.setApplicationMenu(Menu.buildFromTemplate(template));
@@ -387,6 +482,7 @@ if (!app.requestSingleInstanceLock()) {
     registerScheme();
     buildMenu();
     createWindow();
+    scheduleUpdateChecks();
   });
   app.on("activate", () => { if (!win) createWindow(); });
   app.on("window-all-closed", () => app.quit());

app/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "frame-control",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "frame-control",
-      "version": "0.3.1",
+      "version": "0.4.0",
       "license": "MIT",
       "devDependencies": {
         "electron": "^44.4.5",

app/package.json

@@ -1,7 +1,7 @@
 {
   "name": "frame-control",
   "productName": "Frame Control",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Desktop app for managing a Valve Steam Frame over SSH",
   "private": true,
   "main": "main.js",
@@ -37,6 +37,7 @@
       "main.js",
       "preload.js",
       "install-link.js",
+      "updater.js",
       "package.json",
       "build/icon.png"
     ],
@@ -46,7 +47,8 @@
         "to": "ui",
         "filter": [
           "*.py",
-          "*.html"
+          "*.html",
+          "telemetry.json"
         ]
       },
       {
@@ -64,6 +66,14 @@
           "*.py"
         ]
       },
+      {
+        "from": "../frame/openxr-compat",
+        "to": "frame/openxr-compat",
+        "filter": [
+          "XrApiLayer_FRAME_compat.json",
+          "prebuilt/**/*.so"
+        ]
+      },
       {
         "from": "../frame/devkit-utils",
         "to": "frame/devkit-utils",

app/preload.js

@@ -5,12 +5,28 @@
 // It can open Set Up Connection when the headset can't be reached.
 // It also receives frame-control://install links (docs/web-install.md): only
 // what the link asked for, never an install; the page asks the user first.
+// And it passes update state both ways: see app/updater.js.
 const { contextBridge, ipcRenderer, webUtils } = require("electron");
 
 contextBridge.exposeInMainWorld("frameApp", {
   readClipboard: () => ipcRenderer.invoke("clipboard:read"),
   setUpConnection: () => ipcRenderer.invoke("connection:setup"),
   pathForFile: (file) => { try { return webUtils.getPathForFile(file) || ""; } catch { return ""; } },
+  // Updates (app/updater.js): the page shows a banner and an Update button.
+  update: {
+    get: () => ipcRenderer.invoke("update:get"),
+    check: () => ipcRenderer.invoke("update:check"),
+    install: () => ipcRenderer.invoke("update:install"),
+    onState: (cb) => {
+      ipcRenderer.removeAllListeners("update:state");
+      ipcRenderer.on("update:state", (_e, s) => cb(s));
+    },
+  },
+  // Help → Report a Problem… opens the page's report dialog (ui/frame_report.py).
+  onReportProblem: (cb) => {
+    ipcRenderer.removeAllListeners("report:open");
+    ipcRenderer.on("report:open", () => cb());
+  },
   onInstallLink: (cb) => {
     ipcRenderer.removeAllListeners("install-link");
     ipcRenderer.on("install-link", (_e, req) => cb({ kind: req.kind, target: req.target }));

app/test/updater.test.js

@@ -0,0 +1,59 @@
+// Run: node --test app/test/
+const test = require("node:test");
+const assert = require("node:assert");
+const { isNewer, assetName, updateMethod, macBundle } = require("../updater");
+
+test("versions compare numerically, and a release beats its pre-releases", () => {
+  assert.ok(isNewer("0.3.10", "0.3.9"));
+  assert.ok(isNewer("v1.0.0", "0.9.9"));
+  assert.ok(!isNewer("0.3.1", "0.3.1"));
+  assert.ok(!isNewer("0.3.0", "0.3.1"));
+  assert.ok(isNewer("1.0.0", "1.0.0-beta.1"));
+  assert.ok(!isNewer("1.0.0-beta.1", "1.0.0"));
+  assert.ok(!isNewer("garbage", "0.1.0"));
+});
+
+test("asset names match what electron-builder publishes", () => {
+  assert.strictEqual(assetName("darwin", "arm64", "mac-zip"), "Frame-Control-mac-arm64.zip");
+  assert.strictEqual(assetName("win32", "x64", "nsis"), "Frame-Control-Setup-x64.exe");
+  assert.strictEqual(assetName("linux", "x64", "appimage"), "Frame-Control-linux-x86_64.AppImage");
+  assert.strictEqual(assetName("linux", "arm64", "appimage"), "Frame-Control-linux-arm64.AppImage");
+});
+
+const base = { isPackaged: true, env: {}, exists: () => false, writable: () => true };
+
+test("macOS updates in place only from a writable, non-translocated location", () => {
+  const exe = "/Applications/Frame Control.app/Contents/MacOS/Frame Control";
+  assert.strictEqual(macBundle(exe), "/Applications/Frame Control.app");
+  assert.deepStrictEqual(updateMethod({ ...base, platform: "darwin", execPath: exe }),
+                         { method: "mac-zip", bundle: "/Applications/Frame Control.app" });
+  const dmg = "/Volumes/Frame Control 0.3.1/Frame Control.app/Contents/MacOS/Frame Control";
+  assert.strictEqual(updateMethod({ ...base, platform: "darwin", execPath: dmg }).method, "manual");
+  const trans = "/private/var/folders/x/AppTranslocation/ABC/d/Frame Control.app/Contents/MacOS/Frame Control";
+  assert.strictEqual(updateMethod({ ...base, platform: "darwin", execPath: trans }).method, "manual");
+  assert.strictEqual(updateMethod({ ...base, platform: "darwin", execPath: exe, writable: () => false }).method, "manual");
+});
+
+test("Windows needs the installer's copy; Linux needs an AppImage", () => {
+  const exe = "C:\\Users\\a\\AppData\\Local\\Programs\\Frame Control\\Frame Control.exe";
+  assert.strictEqual(updateMethod({ ...base, platform: "win32", execPath: exe, exists: () => true }).method, "nsis");
+  assert.strictEqual(updateMethod({ ...base, platform: "win32", execPath: exe }).method, "manual");
+  assert.strictEqual(updateMethod({ ...base, platform: "linux", execPath: "/opt/x", env: { APPIMAGE: "/home/a/F.AppImage" } }).method,
+                     "appimage");
+  assert.strictEqual(updateMethod({ ...base, platform: "linux", execPath: "/opt/Frame Control/frame-control" }).method, "manual");
+  assert.strictEqual(updateMethod({ ...base, isPackaged: false, platform: "darwin", execPath: "x" }).method, "manual");
+});
+
+test("update.json assets always download from this repository's release", () => {
+  const r = require("../updater").fromManifest({ version: "0.4.0", notes: "n", assets: [
+    { name: "Frame-Control-mac-arm64.zip", url: "https://evil.example/x.zip", digest: "sha256:" + "a".repeat(64) }] });
+  assert.strictEqual(r.assets[0].url, "https://github.com/saphid/frame-control/releases/download/v0.4.0/Frame-Control-mac-arm64.zip");
+  assert.throws(() => require("../updater").fromManifest({ version: "nope", assets: [] }));
+});
+
+test("prepare refuses a release that isn't newer (no downgrades)", async () => {
+  const { prepare } = require("../updater");
+  const release = { version: "0.3.1", assets: [] };
+  await assert.rejects(prepare(release, { method: "appimage", appImage: "/nonexistent/x" }, null, "0.4.0"), /isn't newer/);
+  await assert.rejects(prepare(release, { method: "appimage", appImage: "/nonexistent/x" }, null, "0.3.1"), /isn't newer/);
+});

app/updater.js

@@ -0,0 +1,250 @@
+// Update checks and self-update for the desktop app (docs/releasing.md).
+//
+// The newest version is GitHub's "latest" release of saphid/frame-control. Drafts
+// and pre-releases never count, so a build reaches people only when the
+// maintainer publishes it after testing (scripts/publish-release.sh). That
+// script attaches update.json (version, notes, each asset's SHA-256), read
+// through github.com's latest/download link: the REST API allows only 60
+// unauthenticated requests an hour per IP address, shared by everyone behind
+// the same router, so it's only the fallback.
+//
+// Every download is checked against the SHA-256 digest GitHub records for the
+// asset before anything is replaced. How the update is applied:
+//   macOS     the .zip: unpacked next to the running app, swapped in by a small
+//             script once the app has quit, then reopened.
+//   Windows   the NSIS installer, run silently over the current install; it
+//             reopens the app. A copy unpacked from the .zip is updated by hand.
+//   Linux     the AppImage replaces itself; .deb installs are updated by hand.
+// When the app can't update itself it opens the release page instead.
+const { execFile, spawn } = require("child_process");
+const crypto = require("crypto");
+const fs = require("fs");
+const https = require("https");
+const os = require("os");
+const path = require("path");
+
+const REPO = "saphid/frame-control";  // renamed from saphid/steam-frame; GitHub redirects the old name
+const LATEST = `https://api.github.com/repos/${REPO}/releases/latest`;
+const MANIFEST = `https://github.com/${REPO}/releases/latest/download/update.json`;
+const RELEASES = `https://github.com/${REPO}/releases`;
+
+// "0.3.1" or "v0.3.1" -> [0, 3, 1]; pre-release suffixes sort before the release.
+function parseVersion(v) {
+  const m = String(v || "").trim().replace(/^v/i, "").match(/^(\d+)\.(\d+)\.(\d+)(?:-([0-9A-Za-z.-]+))?$/);
+  return m ? { nums: [+m[1], +m[2], +m[3]], pre: m[4] || null } : null;
+}
+
+function isNewer(candidate, current) {
+  const a = parseVersion(candidate), b = parseVersion(current);
+  if (!a || !b) return false;
+  for (let i = 0; i < 3; i++) if (a.nums[i] !== b.nums[i]) return a.nums[i] > b.nums[i];
+  if (a.pre === b.pre) return false;
+  if (!a.pre) return true;   // 1.0.0 is newer than 1.0.0-beta
+  if (!b.pre) return false;
+  return a.pre > b.pre;
+}
+
+// The asset this copy of the app updates from, by the names electron-builder gives them.
+function assetName(platform, arch, method) {
+  if (method === "mac-zip") return `Frame-Control-mac-${arch}.zip`;
+  if (method === "nsis") return `Frame-Control-Setup-${arch}.exe`;
+  if (method === "appimage") return `Frame-Control-linux-${arch === "x64" ? "x86_64" : arch}.AppImage`;
+  return null;
+}
+
+// How this copy can update itself: mac-zip, nsis, appimage, or manual (with why).
+function updateMethod({ platform, isPackaged, execPath, env, exists, writable }) {
+  if (!isPackaged) return { method: "manual", why: "running from a source checkout" };
+  if (platform === "darwin") {
+    const bundle = macBundle(execPath);
+    if (!bundle) return { method: "manual", why: "can't find the app bundle" };
+    if (bundle.includes("/AppTranslocation/") || bundle.startsWith("/Volumes/")) {
+      return { method: "manual", why: "move Frame Control to Applications first" };
+    }
+    if (!writable(path.dirname(bundle))) return { method: "manual", why: `${path.dirname(bundle)} isn't writable` };
+    return { method: "mac-zip", bundle };
+  }
+  if (platform === "win32") {
+    // electron-builder's NSIS install puts its uninstaller next to the app.
+    const dir = path.dirname(execPath);
+    if (exists(path.join(dir, "Uninstall Frame Control.exe"))) return { method: "nsis" };
+    return { method: "manual", why: "not installed with the installer" };
+  }
+  if (platform === "linux" && env.APPIMAGE) {
+    if (!writable(path.dirname(env.APPIMAGE))) return { method: "manual", why: "the AppImage's folder isn't writable" };
+    return { method: "appimage", appImage: env.APPIMAGE };
+  }
+  return { method: "manual", why: "installed from a package" };
+}
+
+function macBundle(execPath) {
+  const i = execPath.indexOf(".app/Contents/MacOS/");
+  return i < 0 ? null : execPath.slice(0, i + 4);
+}
+
+function get(url, { headers = {}, timeout = 20000, redirects = 5 } = {}) {
+  return new Promise((resolve, reject) => {
+    const req = https.get(url, { headers: { "user-agent": "FrameControl-updater", ...headers }, timeout }, (res) => {
+      if ([301, 302, 303, 307, 308].includes(res.statusCode) && res.headers.location && redirects > 0) {
+        res.resume();
+        const next = new URL(res.headers.location, url);
+        if (next.protocol !== "https:") return reject(new Error("refusing a non-HTTPS redirect"));
+        return resolve(get(next.href, { headers, timeout, redirects: redirects - 1 }));
+      }
+      if (res.statusCode !== 200) { res.resume(); return reject(new Error(`HTTP ${res.statusCode} from ${new URL(url).host}`)); }
+      resolve(res);
+    });
+    req.on("timeout", () => req.destroy(new Error("timed out")));
+    req.on("error", reject);
+  });
+}
+
+async function getJson(url, headers) {
+  const res = await get(url, { headers });
+  let body = "";
+  for await (const chunk of res) body += chunk;
+  return JSON.parse(body);
+}
+
+// update.json and the API's release both become { version, notes, page, assets }.
+function fromManifest(m) {
+  if (!parseVersion(m.version) || !Array.isArray(m.assets)) throw new Error("update.json is malformed");
+  const base = `https://github.com/${REPO}/releases/download/v${String(m.version).replace(/^v/i, "")}/`;
+  return { version: String(m.version).replace(/^v/i, ""), notes: String(m.notes || "").slice(0, 4000),
+           page: m.page || RELEASES,
+           // Assets always come from this repository's release, whatever the manifest says.
+           assets: m.assets.map((a) => ({ name: String(a.name), url: base + encodeURIComponent(String(a.name)),
+                                          size: a.size, digest: a.digest || null })) };
+}
+
+function fromApi(r) {
+  if (r.draft || r.prerelease) throw new Error("GitHub returned an unpublished release");
+  return { version: String(r.tag_name || "").replace(/^v/i, ""), notes: String(r.body || "").slice(0, 4000),
+           page: r.html_url || RELEASES,
+           assets: (r.assets || []).map((a) => ({ name: a.name, url: a.browser_download_url, size: a.size,
+                                                 digest: a.digest || null })) };
+}
+
+async function latestRelease() {
+  try {
+    return fromManifest(await getJson(MANIFEST));
+  } catch (e) {
+    if (!/HTTP 404/.test(e.message)) throw e;  // releases before update.json existed
+  }
+  return fromApi(await getJson(LATEST, { accept: "application/vnd.github+json" }));
+}
+
+async function download(asset, dest, onProgress) {
+  const m = /^sha256:([0-9a-f]{64})$/.exec(asset.digest || "");
+  if (!m) throw new Error(`GitHub has no SHA-256 for ${asset.name}, so it can't be checked`);
+  const res = await get(asset.url, { timeout: 60000 });
+  const total = +res.headers["content-length"] || asset.size || 0;
+  const hash = crypto.createHash("sha256");
+  // "wx": a new file only, never through an existing file or symlink at that path.
+  const out = fs.createWriteStream(dest, { mode: 0o755, flags: "wx" });
+  let done = 0;
+  await new Promise((resolve, reject) => {
+    res.on("data", (chunk) => { hash.update(chunk); done += chunk.length; onProgress && onProgress(done, total); });
+    res.on("error", reject);
+    out.on("error", reject);
+    out.on("finish", resolve);
+    res.pipe(out);
+  });
+  if (hash.digest("hex") !== m[1]) {
+    fs.rmSync(dest, { force: true });
+    throw new Error(`${asset.name} didn't match its SHA-256; nothing was changed`);
+  }
+}
+
+const run = (cmd, args) => new Promise((resolve, reject) =>
+  execFile(cmd, args, { timeout: 120000 }, (err, stdout, stderr) => err ? reject(new Error((stderr || err.message).trim())) : resolve(stdout)));
+
+// Waits for this process to exit, swaps the new bundle in (putting the old one
+// back if that fails), and reopens the app.
+const MAC_SWAP = `set -u
+pid="$1"; app="$2"; new="$3"; stage="$4"
+while kill -0 "$pid" 2>/dev/null; do sleep 0.2; done
+old="$stage/old.app"
+if mv "$app" "$old"; then
+  if mv "$new" "$app"; then rm -rf "$old"; else mv "$old" "$app"; fi
+fi
+xattr -dr com.apple.quarantine "$app" 2>/dev/null
+rm -rf "$stage"
+open "$app"
+`;
+
+async function applyMac(release, bundle, onProgress) {
+  const asset = release.assets.find((a) => a.name === assetName("darwin", process.arch, "mac-zip"));
+  if (!asset) throw new Error(`the release has no ${assetName("darwin", process.arch, "mac-zip")}`);
+  // Staged beside the app, so the final move stays on one volume.
+  const stage = fs.mkdtempSync(path.join(path.dirname(bundle), ".frame-control-update-"));
+  try {
+    const zip = path.join(stage, asset.name);
+    await download(asset, zip, onProgress);
+    await run("/usr/bin/ditto", ["-x", "-k", zip, stage]);
+    fs.rmSync(zip, { force: true });
+    const name = fs.readdirSync(stage).find((n) => n.endsWith(".app"));
+    if (!name) throw new Error("the download has no app in it");
+    const fresh = path.join(stage, name);
+    const version = (await run("/usr/bin/plutil", ["-extract", "CFBundleShortVersionString", "raw",
+                                                   path.join(fresh, "Contents", "Info.plist")])).trim();
+    if (version !== release.version) throw new Error(`the download is version ${version}, not ${release.version}`);
+    const script = path.join(stage, "swap.sh");
+    fs.writeFileSync(script, MAC_SWAP);
+    return () => spawn("/bin/sh", [script, String(process.pid), bundle, fresh, stage],
+                       { detached: true, stdio: "ignore" }).unref();
+  } catch (e) {
+    fs.rmSync(stage, { recursive: true, force: true });
+    throw e;
+  }
+}
+
+async function applyNsis(release, onProgress) {
+  const asset = release.assets.find((a) => a.name === assetName("win32", process.arch, "nsis"));
+  if (!asset) throw new Error(`the release has no ${assetName("win32", process.arch, "nsis")}`);
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "frame-control-update-"));
+  const exe = path.join(dir, asset.name);
+  await download(asset, exe, onProgress);
+  // /S: silent, into the existing install. --force-run: open the app afterwards.
+  return () => spawn(exe, ["--updated", "/S", "--force-run"], { detached: true, stdio: "ignore" }).unref();
+}
+
+async function applyAppImage(release, appImage, onProgress) {
+  const asset = release.assets.find((a) => a.name === assetName("linux", process.arch, "appimage"));
+  if (!asset) throw new Error(`the release has no ${assetName("linux", process.arch, "appimage")}`);
+  // A private folder beside the AppImage, so the final rename stays on one filesystem.
+  const stage = fs.mkdtempSync(path.join(path.dirname(appImage), ".frame-control-update-"));
+  try {
+    const next = path.join(stage, asset.name);
+    await download(asset, next, onProgress);
+    fs.chmodSync(next, 0o755);
+    fs.renameSync(next, appImage);  // the running copy keeps its open file
+  } finally {
+    fs.rmSync(stage, { recursive: true, force: true });
+  }
+  // Without FUSE the AppImage runs extracted (--appimage-extract-and-run, which isn't passed
+  // on to the app); a FUSE mount lives under /tmp/.mount_*. Keep the same mode on restart.
+  const extracted = process.env.APPIMAGE_EXTRACT_AND_RUN === "1" || !process.execPath.includes("/.mount_");
+  const env = { ...process.env, APPIMAGE: appImage, ...(extracted ? { APPIMAGE_EXTRACT_AND_RUN: "1" } : {}) };
+  // Started only once this process has exited, or the new copy would lose the single-instance lock.
+  return () => spawn("/bin/sh", ["-c", 'while kill -0 "$1" 2>/dev/null; do sleep 0.2; done; exec "$2"',
+                                 "sh", String(process.pid), appImage], { detached: true, stdio: "ignore", env }).unref();
+}
+
+// Downloads and prepares the update; returns a function that starts the swap,
+// to be called just before the app quits.
+async function prepare(release, how, onProgress, current) {
+  if (!isNewer(release.version, current)) throw new Error(`${release.version} isn't newer than ${current}`);
+  if (how.method === "mac-zip") return applyMac(release, how.bundle, onProgress);
+  if (how.method === "nsis") return applyNsis(release, onProgress);
+  if (how.method === "appimage") return applyAppImage(release, how.appImage, onProgress);
+  throw new Error(how.why || "this copy can't update itself");
+}
+
+function writable(dir) {
+  try { fs.accessSync(dir, fs.constants.W_OK); return true; } catch { return false; }
+}
+
+module.exports = { REPO, RELEASES, parseVersion, isNewer, assetName, updateMethod, macBundle, latestRelease,
+                   fromManifest, fromApi,
+                   download, prepare, writable };

compat-db/README.md

@@ -1,9 +1,32 @@
 # compat-db: Frame Control's compatibility database
 
 A private [Lakebed](https://docs.lakebed.dev/) capsule holding compatibility
-reports for Android apps on the Steam Frame. For now only the maintainer's
-copy of Frame Control has the key to read or write it. Everyone else's reports
-stay on their own Mac (see `shared()` in `ui/frame_compat_db.py`).
+reports for Android apps on the Steam Frame. Only the maintainer's copy of
+Frame Control has the key to read or write it (see `shared()` in
+`ui/frame_compat_db.py`). Everyone else's reports stay on their computer
+unless they turn on **Share compatibility results**. Then the reports also go
+to PostHog as `compat_report` events, and the maintainer syncs them in (below).
+
+## Community reports
+
+```sh
+python3 ui/frame_compat_db.py sync --dry-run   # what would be added
+python3 ui/frame_compat_db.py sync             # add them
+```
+
+`sync` reads `compat_report` events through PostHog's query API and adds
+them with `via` set to `community`, `community-probe` or `community-install`.
+It skips invalid reports and anything over 30 per reporter per day. Each run
+re-reads the last 30 days, because an offline copy sends its reports late,
+with the time they were made. `posthog-sync.json`, next to the outbox,
+remembers which reports it has handled and each reporter's daily count, so
+nothing is added twice and the cap holds across runs.
+
+It needs:
+
+- the PostHog project id: `"project"` in `ui/telemetry.json`
+- a personal API key with `query:read`: `POSTHOG_PERSONAL_API_KEY`, or in the
+  Keychain (service `frame-control-posthog`, account `personal-api-key`)
 
 - Live: `https://frame-compat.lakebed.app` (deploy `dep_dDmcsosVSiFirpW6`,
   claimed, so it doesn't expire). The browser page only says it's private.

docs/announcements.md

@@ -0,0 +1,144 @@
+# Announcing changes
+
+How we tell people about Frame Control features and fixes as they merge. The
+same few sentences feed the X post, the release notes and the website, so they
+are written once, in the pull request, while the change is fresh.
+
+## What gets announced
+
+| Kind | Announce? | Example |
+|---|---|---|
+| **New** — something you can now do | Yes, its own post | Stream Mac windows into the Frame as panels |
+| **Better** — something existing got noticeably easier, faster or wider | Yes, its own post or a roundup | APKs install without the Android SDK |
+| **Fixed** — something broken that users hit | Yes if people reported it or it blocked a flow; otherwise the next roundup | Mac mirror showed a zoomed-in corner |
+| **Release** — a tagged build | Always, one post linking the release | Frame Control 0.3.1 |
+| Tests, refactors, CI, docs-only, website polish | No | Fake Frame tests, screenshot crop |
+
+If a change isn't worth a sentence to someone who owns a Frame, it isn't
+announced.
+
+## The voice
+
+Write it the way the README and release notes already read.
+
+- **Lead with what the person can now do**, in their words: "Install older
+  versions of an app when the newest won't run on the Frame", not "Add APK
+  version fallback resolver".
+- **Plain and specific.** Name the thing, give the number: "about 30 fps",
+  "4,500 apps", "up to 8 older versions". No "blazing", "game-changing",
+  "excited to announce", "huge", or exclamation marks.
+- **Say where it works.** Platforms and what it was tested on, briefly:
+  "Tested on a real Frame from macOS 27." Don't claim what wasn't tested.
+- **Say the catch.** If it needs a setup step, an unsigned build, or only works
+  on one OS, say so in the same post.
+- **Sentence case**, full sentences, British spelling to match the docs.
+  Contractions are fine.
+- **No emoji in the text.** One image, GIF or short clip carries the tone
+  instead. The only symbol is the kind label below.
+- **Unofficial, always.** Never imply Valve made or endorses it. Say "Steam
+  Frame" for the headset and "Frame Control" for the app.
+- **Credit people.** If a user reported the bug or suggested the feature and is
+  happy to be named, thank them by handle.
+
+## The formats
+
+Every announceable PR ends with an `## Announcement` section holding these.
+The reviewer checks it like code.
+
+### 1. The post (X, and any other social account)
+
+```
+<Kind>: <what you can do now, one sentence>
+
+<one or two sentences: how it works, the catch, or what it was tested on>
+
+<link>
+```
+
+- `<Kind>` is `New`, `Better` or `Fixed`.
+- 280 characters maximum including the link (X counts any link as 23).
+- One link: the release if it has shipped, otherwise the PR.
+- One visual when the change is visible: a screenshot from the app, a GIF, or a
+  short clip from the headset. Alt text describes what it shows.
+- No hashtags, except `#SteamFrame` on releases and on posts about something
+  new, because people search for it.
+
+### 2. The release-note line
+
+One bullet under **New in x.y.z**, same as the current release notes: the
+first half of the post's first sentence, no kind label, no link.
+
+### 3. Release post
+
+```
+Frame Control <version>: <the headline change>
+
+<one sentence on the headline change>. Also: <two or three short items>.
+
+Windows, macOS and Linux: <release link>
+#SteamFrame
+```
+
+The release title on GitHub uses the same `Frame Control <version>: <headline>`
+line, as 0.3.0 and 0.3.1 already do.
+
+### Roundups
+
+Small fixes that don't earn their own post wait for a roundup, posted with the
+next release or when three or more have piled up:
+
+```
+Fixed in Frame Control this week:
+- <fix>
+- <fix>
+- <fix>
+
+<link>
+```
+
+## Examples from what has already merged
+
+**#11, older APK versions**
+
+```
+New: when an Android app is too new for the Frame, Frame Control now offers
+older versions that will install.
+
+It checks F-Droid, its archive and IzzyOnDroid, and verifies each download
+before it goes on the headset.
+
+https://github.com/saphid/steam-frame/pull/11
+```
+
+**#8, Mac mirror fixes**
+
+```
+Fixed: mirroring your Mac into the Steam Frame now fits the whole desktop in
+the panel, asks for the right password, and shows the cursor.
+
+Tested end to end on a real Frame from macOS 27.
+
+https://github.com/saphid/steam-frame/pull/8
+```
+
+**v0.3.1**
+
+```
+Frame Control 0.3.1: install APKs without the Android SDK
+
+Frame Control now reads APK files itself, so there's nothing extra to install.
+Also: Linux and Windows game sideloading, and one-click install links.
+
+Windows, macOS and Linux: https://github.com/saphid/steam-frame/releases/tag/v0.3.1
+#SteamFrame
+```
+
+## Posting
+
+Nothing is posted without a person approving it. The flow is:
+
+1. The PR carries its `## Announcement` section.
+2. On merge, the post is drafted from that section (manually for now).
+3. Alex approves or edits it, then it's posted from the project account.
+4. Replies and questions that turn out to be bugs become GitHub issues labelled
+   `feedback`, same as the website form.

docs/apks.md

@@ -5,6 +5,12 @@ in **Lepton**, Valve's Waydroid-based container. Lepton is built for games,
 not general Android use
 ([GamingOnLinux](https://www.gamingonlinux.com/2026/09/lepton-from-valve-to-run-android-games-on-linux-is-now-open-source/)).
 
+**VR streaming clients:** WiVRn 26.9 and ALVR 20.14.1 install, but both fail
+OpenXR instance creation on the checked Frame because its Android runtime lacks
+`XR_KHR_convert_timespec_time` (**verified** 2026-09-28, SteamOS 0.4.1,
+BUILD_ID 20260925.6191901). They are not Frame Control dependencies. See
+[the feasibility results and options](linux-vr-streaming.md).
+
 ## Install from the Mac: one app, one Lepton instance (verified 2026-09-25)
 
 Use Frame Control's **Android apps** section (search, Install, Test, Report), drop

docs/evidence/linux-vr/2026-09-28.txt

@@ -0,0 +1,47 @@
+Frame client feasibility, 2026-09-28
+SteamOS VERSION_ID=0.4.1 BUILD_ID=20260925.6191901; uname -m=aarch64
+SteamVR: vrserver log reports 2.18.1; process 2256 remained alive across checks.
+Base: dcf9689f6459e576d35fc507eb702ca6b2bf4dad (main).
+Unmodified upstream release APKs; installed with ui/frame_android.py install APK --vr.
+No Linux host attached. No pairing, streamed video, input, audio or worn-headset checks.
+Selected logcat lines only; timestamps in Android logs are UTC.
+
+WiVRn-release.apk
+https://github.com/WiVRn/WiVRn/releases/tag/v26.9
+sha256=1df6649ec77224fcc821af0ab4897222bdf3d7eb6ce6ad636461336724111331
+E/OpenXR-Loader( 1140): Error [GENERAL | xrCreateInstance | OpenXR-Loader] : LoaderInstance::CreateInstance, no support found for requested extension: XR_KHR_convert_timespec_time
+I/WiVRn   ( 1140): [2026-09-28 12:07:58.987] [WiVRn] [info] Failed to create OpenXR instance version 1.1.58: XR_ERROR_EXTENSION_NOT_PRESENT
+E/OpenXR-Loader( 1140): Error [GENERAL | xrCreateInstance | OpenXR-Loader] : LoaderInstance::CreateInstance, no support found for requested extension: XR_KHR_convert_timespec_time
+I/WiVRn   ( 1140): [2026-09-28 12:07:59.034] [WiVRn] [info] Failed to create OpenXR instance version 1.0.58: XR_ERROR_EXTENSION_NOT_PRESENT
+E/WiVRn   ( 1140): [2026-09-28 12:07:59.035] [WiVRn] [error] Error during initialization: Failed to create OpenXR instance: XR_ERROR_EXTENSION_NOT_PRESENT
+
+alvr_client_android.apk
+https://github.com/alvr-org/ALVR/releases/tag/v20.14.1
+sha256=be68feeb02665e3d69f1cdbcabf38ea4d15c42868a7ec6b5e698dbefee4e4e36
+E/OpenXR-Loader( 1139): Error [GENERAL | xrCreateInstance | OpenXR-Loader] : LoaderInstance::CreateInstance, no support found for requested extension: XR_KHR_convert_timespec_time
+I/RustStdoutStderr( 1139): Error [GENERAL | xrCreateInstance | OpenXR-Loader] : LoaderInstance::CreateInstance, no support found for requested extension: XR_KHR_convert_timespec_time
+E/[ALVR NATIVE-RUST]( 1139): ALVR panicked: What happened:
+E/[ALVR NATIVE-RUST]( 1139): panicked at alvr/client_openxr/src/lib.rs:220:10:
+E/[ALVR NATIVE-RUST]( 1139): called `Result::unwrap()` on an `Err` value: ERROR_EXTENSION_NOT_PRESENT
+
+Cleanup verified: both app directories, compatdata directories and Steam shortcuts absent.
+Both test containers stopped and removed. No Steam/SteamVR restart or global setting changes.
+
+Valve release notes fetched from ISteamNews/GetNewsForApp/v2 (appid=250820).
+
+SteamVR Beta Updated - 2.18.1
+https://steamstore-a.akamaihd.net/news/externalpost/steam_community_announcements/1844751498219787
+Added tethered Quest support over USB (must be used with Steam Link Beta)
+
+Introducing SteamVR 2.17
+https://steamstore-a.akamaihd.net/news/externalpost/steam_community_announcements/1843481262693486
+Adds initial support for USB streaming. Note: Requires new Steam Client Beta.
+Fix crash using Steam Link on Linux when games submit invalid textures.
+Improve streaming recovery when using Steam Link on Linux.
+
+SteamVR Beta Updated - 2.17.8
+https://steamstore-a.akamaihd.net/news/externalpost/steam_community_announcements/1842212951314598
+Fix crash using Steam Link on Linux when games submit invalid textures.
+Improve streaming recovery when using Steam Link on Linux.
+Adds initial support for USB streaming.
+USB streaming can be used without WiFi by opting into the Steam Client Beta.

docs/frame-control.md

@@ -56,9 +56,11 @@ counts them while they run.
   Steam library), then launch, stop, test or remove it. **Report an APK** records
   whether any APK worked (F-Droid or not: pick a file, type a package, or use an
   installed app). Your reports are saved on your computer and change the verdicts
-  you see. They aren't uploaded anywhere: the shared database is maintainer-only
-  for now (see [compat-db/README.md](../compat-db/README.md)). Uses the app's bundled
-  `adb`, or yours if you have one.
+  you see. With **Share compatibility results** on (Privacy & updates), they also
+  go to the shared database ([privacy.md](privacy.md),
+  [compat-db/README.md](../compat-db/README.md)). A failed install records
+  itself when the APK was the problem, and after an install the app offers a
+  20-second test. Uses the app's bundled `adb`, or yours if you have one.
 - **Android display**: pick a running Lepton instance (by the app in it) and set
   its resolution (Native 1920×1080, or Sharp 2560×1440 with density scaled to
   match), UI scale (Smaller / Default / Larger, or an exact dpi) and text size
@@ -148,8 +150,9 @@ npm run dist:win       # Windows: installer and .zip
 npm run dist:linux     # Linux: AppImage and .deb, x64 and arm64
 ```
 
-Pushing a `v*` tag builds all three in GitHub Actions and attaches them to the
-release (`.github/workflows/release.yml`).
+Pushing a `v*` tag builds all three in GitHub Actions and attaches them to a
+draft release (`.github/workflows/release.yml`). Running copies are offered it
+once you publish it: see [releasing.md](releasing.md).
 
 ## AI agents and assistant
 

docs/how-the-frame-works.md

@@ -55,6 +55,7 @@ Lepton (Android 11, podman container "lepton-dev") ← its own panel, app 305600
 | **Tools on the image:** Python 3.12.3, `ffmpeg`, `openssl`, `curl`, `rsync`, `zip`/`unzip`, `flatpak`, `wpctl`, `podman`. **No `adb`.** `steamos` is uid 1000, in `wheel`, and sudoers has `%wheel ALL=(ALL) ALL`, so `sudo -S` takes the Developer Mode password on stdin. **Verified 2026-09-27.** | Running Frame Control's server on the Frame (`FRAME_LOCAL=1`, [iphone.md](iphone.md)) |
 | **Each Lepton instance is a podman container** named `lepton-steamlaunch-<instance id>`, labelled with its ADB port (`podman ps --format '{{.Names}} {{.Labels.adb_port}}'`). `podman exec <container> /system/bin/sh -c '…'` runs Android's shell inside it with no adb at all (used for `pidof` and `logcat` by the app tester). Running `wm size`/`wm density` that way is untested. **Verified 2026-09-27.** | `ui/frame_android.py`, the iPhone app's display settings |
 | **Asleep means off the network.** In standby the Frame stops answering on its LAN address, `frame.local` and Tailscale alike (`Host is down`, `No route to host`, timeouts), and ping fails. It was unreachable for about 2.5 hours until woken. Nothing over SSH can wake it. **Verified 2026-09-27.** | Frame Control's offline banner and retries |
+| **What puts it to sleep is Steam's idle timer**, not logind. The journal shows `steamui_system: Switching to power state: [ k_ESystemPowerState_Sleep ] reason: 'ComputeNextPowerState: active: 3600 < 3600 (k_EACState_Connected)'`, then Steam suspends. SSH work doesn't count as activity. The timers are the client settings `system_idle_suspend_ac_sec` (3600) and `system_idle_suspend_battery_sec` (900); 0 means Never (Settings → Power → Sleep after inactivity). They can be written over DevTools the way the settings page does. logind refuses a `systemd-inhibit --mode=block` sleep lock from an SSH session (`Interactive authentication required`) but accepts one started with `systemd-run --user`. `scripts/keep-awake.sh on|off|status` does both and restores the old timers on `off`. **Verified 2026-09-28**, BUILD_ID 20260925.6191901. Whether Steam's suspend honours the inhibitor on its own is **inferred** (polkit gives `steamos` no `suspend-ignore-inhibit`), not tested. | Keeping the Frame awake for agent work |
 | **Battery at full on a charger** can read `Discharging` at about 0 W (for example 99 %, 0.0 W, USB-C PD 18 W). Treat under 0.5 W on a charger as "not charging", not "draining". **Verified 2026-09-27.** | Frame Control's battery card |
 | **The OS image is downloadable.** Valve's recovery images for the Frame are at `https://steamdeck-images.steamos.cloud/recovery/`. The root filesystem inside is btrfs, and it runs as an SSH test target on ARM64 Linux without the headset (`tests/frame-container/frame-image.sh`). **Verified 2026-09-27.** | [recovery-and-images.md](recovery-and-images.md) |
 | **Boot / recovery menu.** Hold Power ~10 s until the LED goes off, then power on while holding the **AUX button on top of the Power button** (not the volume keys) until a text menu appears. Entries: `Current` (SteamOS-A/B + build), `Previous` (the other A/B slot), `Boot from USB`, `Repair Steam Installation`, `Erase User Data` (factory reset), `ADB mode`, `Battery Ship Mode`. It auto-boots `Current` after a ~15 s countdown. **Volume Up/Down (left side) move, AUX (right side) selects.** For a boot loop, Valve says pick `Previous` (keeps user data); then `Repair Steam Installation`; `Erase User Data` wipes `~` (SSH keys, Tailscale, Flatpaks, T3 setup). Last resort is a full re-image, two ways: (1) USB: write `steamframe-oobe-repair-<build>.img.bz2` to an 8 GB+ USB-C stick (Balena Etcher on the Mac), pick `Boot from USB`, then use "Wipe Device & Install SteamOS" / "Repair SteamOS" (keeps games and personal content) from the recovery desktop; (2) cable/EDL: `steamframe-oobe-repair-qdl-<build>.tar.gz`, run `flash.sh` (Linux) or `flash.cmd` (Windows), then with the Frame off for 10 s hold Power + Vol Up + Vol Down for 10 s and plug it in; it reflashes and reboots. Both images: `https://steamdeck-images.steamos.cloud/recovery/` (build 20260922.5153644, 0.3.0, 3.8 GiB each, no published checksums); local copies in `~/Downloads/steam-frame-recovery/`. File names, checksums and what's inside: [recovery-and-images.md](recovery-and-images.md). Source: Valve's [SteamOS Recovery FAQ](https://help.steampowered.com/en/faqs/view/1B71-EDF2-EB6D-2BB3) and [Installation and Repair FAQ](https://help.steampowered.com/en/faqs/view/65B4-2AA3-5F37-4227), plus a menu photo in [EloiStree/HelloSteamFrame#9](https://github.com/EloiStree/HelloSteamFrame/issues/9). **Inferred** (Valve docs, 2026-09-26); not yet tried on our Frame. | Recovering from a boot loop |

docs/linux-vr-streaming.md

@@ -0,0 +1,195 @@
+# PC VR streaming from Linux
+
+**Recommendation, 2026-09-28:** test Valve's current SteamVR/Steam Link path
+on a Linux gaming PC before building another streamer. Valve now documents
+Linux streaming fixes and USB support. We have no Linux host attached, so
+Linux-to-Frame VR streaming remains **unverified here**.
+
+This is the feasibility and options report for
+[#24](https://github.com/saphid/frame-control/issues/24), not a shipped streaming
+feature. Frame Control's features must use our own implementation or standard
+platform components. WiVRn and ALVR are research comparisons, not dependencies.
+An optional install shortcut is the most we would offer for a third-party app.
+Our own streamer requires Alex's choice before implementation.
+
+## What was checked on the Frame
+
+**Verified** on 2026-09-28: aarch64, SteamOS **0.4.1**, BUILD_ID
+`20260925.6191901`, SteamVR **2.18.1**. Version and build are recorded separately;
+earlier docs associate this build with other SteamOS version labels.
+
+| Client | Installation | Runtime result |
+|---|---|---|
+| WiVRn **26.9**, upstream `WiVRn-release.apk` | API 29, arm64-v8a; installed in its own immersive Lepton instance | OpenXR instance creation fails: missing `XR_KHR_convert_timespec_time`. Both 1.1.58 and 1.0.58 attempts return `XR_ERROR_EXTENSION_NOT_PRESENT` |
+| ALVR **20.14.1**, upstream `alvr_client_android.apk` | API 26, arm64-v8a; installed in its own immersive Lepton instance | Same missing extension. Client panics at `client_openxr/src/lib.rs:220` with `ERROR_EXTENSION_NOT_PRESENT` |
+
+The [evidence excerpt](evidence/linux-vr/2026-09-28.txt) includes APK SHA-256s,
+upstream release links, loader errors and cleanup results. These are failures
+before an OpenXR session, not successful VR clients. WiVRn was launched twice;
+ALVR's container remained up despite its client panic. Container liveness alone
+does not establish VR compatibility.
+
+Both APKs already declare `MAIN` and `LAUNCHER`. They were installed unmodified
+using this branch's existing `python3 ui/frame_android.py install APK --vr`,
+then launched through their Steam shortcuts. Logs came from the instance's
+`podman exec … /system/bin/logcat`; the user journal also retained WiVRn's errors
+after its container exited. No headset was worn and no host was connected.
+
+All test app files, compatdata, shortcuts and containers were removed afterwards.
+SteamVR's original process remained running. No global settings changed.
+
+### Relation to the VR APK branch
+
+**Documented from source:** [PR #20](https://github.com/saphid/frame-control/pull/20)
+was read, not edited (branch inspected at
+[`038dcd4`](https://github.com/saphid/frame-control/commit/038dcd48cd75336f6a86c63c7878bfc9c52deec9)).
+Its compatibility layer handles OpenXR version negotiation, some controller
+profiles and refresh-rate requests. It does **not** implement
+`XR_KHR_convert_timespec_time`. Its launcher fix is unnecessary for these APKs.
+This report has **no unmerged code dependency** on that PR, and neither APK was
+tested with its layer injected.
+
+**Documented from upstream source:** WiVRn requests the extension in
+[`application.cpp`](https://github.com/WiVRn/WiVRn/blob/bbc6e4cc36c355fa6180980abd231673dc15115d/client/application.cpp#L1286)
+and uses it to convert `CLOCK_MONOTONIC` into `XrTime` in
+[`instance::now()`](https://github.com/WiVRn/WiVRn/blob/bbc6e4cc36c355fa6180980abd231673dc15115d/client/xr/instance.cpp#L335).
+ALVR also [requests it unconditionally](https://github.com/alvr-org/ALVR/blob/a9f6542fa507a841f40ab4f3fcb531427cd02550/alvr/client_openxr/src/lib.rs#L188).
+Simply deleting the extension request or returning made-up timestamps would
+not prove correct tracking or timing. A real fix needs a valid clock mapping
+and further runtime tests. No such patch was made.
+
+### Native SteamOS aarch64 clients
+
+**Verified:** the Frame has a native OpenXR runtime manifest at
+`~/.config/openxr/1/active_runtime.json`, pointing to SteamVR's
+`bin/linuxarm64/vrclient.so`.
+
+**Documented:** WiVRn's [26.9 README](https://github.com/WiVRn/WiVRn/blob/bbc6e4cc36c355fa6180980abd231673dc15115d/README.md)
+describes its Linux client as debugging-only, without audio or hardware decode.
+ALVR 20.14.1's [non-Android decoder](https://github.com/alvr-org/ALVR/blob/a9f6542fa507a841f40ab4f3fcb531427cd02550/alvr/client_core/src/video_decoder/mod.rs)
+returns no decoded frames. The inspected releases ship Android clients, not a
+ready-to-run native Frame client.
+
+**Inferred:** a native port is possible research, but neither release offers a
+demonstrated native alternative to the blocked APKs. Native builds, native
+extension enumeration, hardware decoding and audio were **not tested**. The
+Android extension failure does not establish that the native runtime lacks it.
+
+## (a) Valve's own path — recommended first
+
+**Documented**, from Valve's release notes rather than launch-window reports:
+
+- [SteamVR 2.17.8 beta](https://steamstore-a.akamaihd.net/news/externalpost/steam_community_announcements/1842212951314598)
+  says “Fix crash using Steam Link on Linux when games submit invalid textures”
+  and “Improve streaming recovery when using Steam Link on Linux.” It also
+  adds initial USB streaming, with Steam Client Beta required to use USB
+  without Wi-Fi.
+- [SteamVR 2.17 release](https://steamstore-a.akamaihd.net/news/externalpost/steam_community_announcements/1843481262693486)
+  repeats Linux streaming fixes and initial USB support. USB is no longer
+  solely a claim about an old beta, but version/channel requirements still
+  need checking on the actual host.
+- [SteamVR 2.18.1 beta](https://steamstore-a.akamaihd.net/news/externalpost/steam_community_announcements/1844751498219787)
+  adds USB-tethered **Quest** support with Steam Link Beta. That entry is not
+  proof of a Frame/Linux combination.
+- The [Steam Link page](https://store.steampowered.com/app/353380/Steam_Link/)
+  lists Linux desktop clients, while its Quest VR requirements still say
+  Windows 10 or newer. Desktop Steam Link support is not equivalent to VR host
+  support, and the Quest requirements are not a Frame support matrix.
+
+**Inferred:** Valve has a Linux VR streaming path worth testing. The old blanket
+claim “Linux cannot stream VR” is no longer justified by the evidence. These
+release notes do not establish which Linux GPU/driver/Frame combinations work.
+USB changes the transport; it does not by itself prove host encoder support.
+
+**Not verified:** Linux host discovery, pairing, wireless or USB streaming,
+stereo rendering, controllers, haptics, audio, latency, or a game. Frame-only
+inspection cannot establish any of these. Flat Remote Play and a desktop shown
+on a panel are not substitutes for this test.
+
+Next test, once a Linux gaming PC is available: record distro, GPU/driver,
+Steam client channel/version and SteamVR version; use the Frame's built-in
+Steam connection flow, first wirelessly and then over a data-capable USB cable.
+Launch a free OpenXR sample or developer-consented VR game. Verify stereo,
+head/controller tracking, haptics and audio while worn; retain both ends' logs
+and measure latency and recovery after a link interruption. Restore any test
+channel changes. Do not change the shared headset's channel just for this report.
+
+If that works, Frame Control can provide our own host checks, setup guidance
+and session controls around Valve's existing platform. First establish which
+controls have a usable interface; no stable automated pairing API has been
+verified. **Estimate (inferred):** 2–5 engineer-days for the hardware feasibility
+pass; another 1–2 weeks for a small integration if those interfaces exist.
+
+## (b) Our own streaming — proposal only
+
+This is a new VR transport and device integration, not a desktop capture feature.
+A plausible first target is **one Linux GPU family, one host, one Frame**, using
+SteamVR on both ends. Our host driver would expose a remote HMD/controllers,
+receive poses and inputs, and obtain stereo textures for hardware encoding.
+Our Frame OpenXR app would decode, submit the correct eye views and render poses
+at predicted display times, and return tracking/input. SteamVR/OpenXR, bundled
+codec/transport libraries and platform GPU APIs fit the ownership rule; a
+WiVRn/ALVR/Monado server dependency would not.
+
+**Inferred design risks:** Linux SteamVR texture-sharing/driver interfaces and
+Frame decode-to-GPU interoperability need a spike before committing to this
+architecture. Sending an already-composited desktop mirror loses the stereo,
+pose and timing information we need. Late reprojection, clock conversion,
+backpressure, controller bindings, audio sync and reconnects are substantial
+work. A runtime shim must not assume `XrTime` equals monotonic nanoseconds.
+
+### Reuse from `mac-in-headset`
+
+**Documented from our code**, read-only at
+[`1b90c64`](https://github.com/saphid/frame-control/commit/1b90c64b73bace54c63a3aae154c5d29a9448d72):
+
+- Reuse the ideas for low-latency encoding without B-frames, dropping work
+  before encoding, bounded queues, keyframe recovery, adaptive bitrate,
+  per-frame timing and authenticated session setup.
+- Its VideoToolbox encoder and ScreenCaptureKit capture are macOS-specific.
+  Linux needs a new GPU encoder path (for example VA-API or NVENC via bundled
+  libraries) and VR texture capture, not a port of window capture.
+- Its WebSocket over SSH is useful for a first controlled transport experiment
+  and control messages. Reliable TCP can stall behind lost packets; a VR media
+  path needs measured deadline behaviour, likely datagrams with loss recovery
+  using an ordinary bundled transport library. Do not invent cryptography.
+- Its Chromium/WebCodecs panel viewer is not a VR client. That branch reports
+  software H.264 decoding and occasional long Wi-Fi stalls on the Frame.
+  Its desktop latency measurements are not motion-to-photon measurements or
+  evidence that a 90/120 Hz stereo stream will work.
+
+**Size/effort estimate (inferred, one experienced full-time engineer, hardware
+available):**
+
+| Phase | Deliverable / stop condition | Effort |
+|---|---|---|
+| Feasibility | Linux driver texture access, Frame hardware decode into OpenXR, pose/clock loop; stop if any cannot meet frame deadlines | 2–4 weeks |
+| First end-to-end prototype | One GPU/codec, stereo sample over a controlled LAN, head/controllers, logs and teardown | 4–8 additional weeks |
+| Usable limited beta | Audio/haptics, pairing, recovery, bitrate/loss handling, installer, worn testing and latency work | 6–12 additional weeks |
+| Wider support | Multiple GPU vendors/distros, USB and Wi-Fi variation, long-session stability | 2–4 additional months |
+
+Planning range: **12–24 engineer-weeks for a limited beta**, roughly
+**10–25k lines of our code plus tests/tooling**, excluding bundled libraries.
+This is a low-confidence scope estimate, not a delivery promise; an unsupported
+driver or decode interface could block it entirely. Foveated streaming,
+eye tracking and parity with Valve are excluded. A Linux gaming PC and repeatable
+worn-headset testing are prerequisites. **Do not build this until Alex chooses.**
+
+## (c) Optional “install WiVRn” shortcut only
+
+Allowed as a clearly optional convenience, never a prerequisite for a Frame
+Control feature. **Documented:** WiVRn's server Flatpak ID is
+`io.github.wivrn.wivrn`; its client/server versions must match, and its Flatpak
+includes xrizer/OpenComposite. Those are properties of an independently
+installed third-party stack, not components of our implementation.
+
+**Recommendation:** defer the shortcut while the current client fails before
+session creation. If offered later, label that compatibility result and let
+the user choose the install; do not present “install” as “streaming works.”
+**Estimate (inferred):** 1–2 engineer-days for an optional host-side shortcut
+with package/version detection and honest status, excluding third-party fixes.
+No shortcut, host install, pairing automation or streaming UI was built here.
+
+Choose **(a)** for the next hardware test. Keep **(b)** as a separately approved
+project if Valve's path fails or lacks a required capability. **(c)** does not
+solve the verified client blocker and should not be the product's foundation.

docs/privacy.md

@@ -0,0 +1,143 @@
+# Privacy and analytics
+
+Frame Control sends anonymous analytics to [PostHog](https://posthog.com)
+(US cloud) so the maintainer can see how many people use it, which features
+matter and where installs fail. You choose how much in **Privacy & updates**,
+the last panel on the page. `ui/frame_telemetry.py` is the whole
+implementation.
+
+## The three levels
+
+| Level | Default | What it sends |
+|---|---|---|
+| Anonymous usage statistics | On, after a notice on first run | The events in the table below |
+| Share compatibility results | Off | Your Android compatibility reports and tests |
+| Send error details | Off | Scrubbed error messages and tracebacks |
+
+Nothing is sent until the first-run notice has been shown. The notice's
+**Share more to help fix problems** button turns on the second and third
+levels together. Either can be turned off later. Turning a level off
+deletes that level's events that haven't been sent yet.
+
+**Show what's been sent** in the panel lists the last 50 events that left your
+computer, exactly as they were sent.
+
+## Anonymous
+
+- Events carry a random id, made when Frame Control first runs and kept in
+  its data folder (`telemetry/settings.json`). It isn't derived from your
+  computer, account or network. To get a new one, delete that file.
+- Events are sent without person profiles (`$process_person_profile: false`)
+  and without location lookup (`$geoip_disable: true`). Each carries a
+  placeholder address (`$ip: 0.0.0.0`), so PostHog stores that instead of
+  yours.
+- Every event includes the app version, OS name (macOS, Windows or Linux),
+  CPU architecture and Python version.
+
+## Usage events
+
+| Event | When | Properties besides the common ones |
+|---|---|---|
+| `app_installed` | First run | |
+| `app_updated` | First run of a new version | `from_version` |
+| `app_opened` | At most once a day | |
+| `frame_connected` | The first time a SteamOS build is seen | `steamos_build`, `steamos_version` |
+| `tab_viewed` | The first click on each tab in a session | `tab` |
+| `install_finished` | Any install finishes, working or not | `kind` (apk, flatpak, steam, title, web), `ok`, `seconds`, `error_category`, `installer_code`, and see below |
+| `update_offered`, `update_started`, `update_failed` | The update banner | `to_version`, `error_category` |
+
+`install_finished` never includes a file name, path or error message. An
+error becomes one category from a fixed list (for example `apk_wrong_abi` or
+`frame_unreachable`), plus Android's own `INSTALL_FAILED_…` code when there
+is one. It names what was installed only when that's already public:
+
+- F-Droid catalogue apps: `package`. Never the version, since a local build can reuse a
+  catalogue app's package name
+- Flathub apps: `flatpak_id`
+- Steam games: `steam_appid`
+- A sideloaded title: only its runtime (Proton or Linux)
+
+Any other APK is sent as `catalog: false`, with no name.
+
+## Compatibility results (opt-in)
+
+Each report becomes a `compat_report` event with the fields the Report dialog
+shows: package, version, result or rating, your notes, how it was run, and the
+SteamOS and Lepton builds. Before sending:
+
+- the notes, app name and version are scrubbed like error messages (see
+  below)
+- the APK's source is kept only if it's `F-Droid` or the public host name of
+  a download link (`https://example.com/…`). File names, user names,
+  passwords, ports, paths, IP addresses and local host names are dropped
+
+When you turn this on, reports you made earlier on this computer are shared
+too.
+
+The maintainer's `python3 ui/frame_compat_db.py sync` copies these events
+into the compatibility database, marked `via=community…`. It takes at most
+30 per reporter per day.
+
+## Error details (opt-in)
+
+`$exception` events carry an error message, the Frame Control file, line and
+function it came from, and the request that failed (for example
+`POST /api/android install`). Before anything is sent, the message is
+scrubbed:
+
+- your home folder becomes `~`, and any user name becomes `<user>`
+- IP and MAC addresses, email addresses, `.local`, `.lan` and Tailscale host
+  names, Steam ids, SSH and PEM keys, API tokens and long hex strings are
+  replaced
+- URLs are cut down to their scheme and a public host name, or `<url>`. User
+  names, passwords, ports, paths and queries are dropped
+- `token=`, `key=`, `password=` and similar values are replaced
+
+The same error is sent at most once every 10 minutes.
+
+## Report a problem
+
+**Report a problem** is the warning-sign button in the header, also in the
+Privacy panel and under **Help → Report a Problem…**. It sends the report
+privately to Frame Control's PostHog project as a `problem_report` event, the
+same way as the analytics above, so only the maintainer can read it and
+nothing is published. It works whatever the analytics settings are, because
+the person sends it deliberately. The report has the kind, title and text you
+wrote, how to reach you if you gave it, a short reference shown after sending,
+and the diagnostics below. It has its own random id, so it isn't linked to
+your analytics events.
+
+With **Include diagnostics** ticked (the default), the report adds:
+
+- the app version and whether it's a built app
+- the OS, its release and CPU, and the Python version
+- the Frame's SteamOS build, if it has connected since the app started
+- which analytics levels are on
+
+**Also include recent activity and the server log** is off by default,
+because those lines can name files and apps. When ticked, it adds the newest
+Activity lines and server log lines, without the request lines.
+
+Everything is scrubbed like error details and limited to what fits in the
+report. Environment details are kept first, then the newest lines. **Show
+exactly what's included** shows the snapshot that will be sent, and later
+activity isn't added to it. If PostHog can't be reached, **Copy report** puts
+the whole report on the clipboard.
+
+The maintainer reads reports on the Frame Control dashboard in PostHog, or
+with `python3 ui/frame_report.py inbox [days]`, which uses the same personal
+API key as `frame_compat_db.py sync`.
+
+## Turning it all off
+
+Untick the boxes, or set `DO_NOT_TRACK=1` or `FRAME_CONTROL_TELEMETRY=0` in
+the environment that starts Frame Control. A copy run from a source checkout
+never sends anything unless `FRAME_CONTROL_TELEMETRY=1` is set.
+
+## Update checks
+
+The desktop app asks GitHub for the latest release shortly after starting,
+then every 6 hours: the latest release's `update.json` on GitHub, or
+`api.github.com/repos/saphid/frame-control/releases/latest` if that fails.
+Those requests carry no id. To stop it, set
+`FRAME_CONTROL_NO_UPDATE_CHECK=1`. See [releasing.md](releasing.md).

docs/releasing.md

@@ -0,0 +1,59 @@
+# Releasing and updates
+
+Frame Control checks for updates itself. The desktop app offers a new version
+only once it's GitHub's **latest release**, and drafts and pre-releases never
+count. So a build reaches people only when you publish it, after testing it.
+
+## Steps
+
+1. Bump `version` in `app/package.json`, commit, and push a tag:
+
+   ```sh
+   git tag v0.4.0 && git push origin v0.4.0
+   ```
+
+   `.github/workflows/release.yml` builds macOS, Windows and Linux, and
+   attaches everything to a **draft** release for that tag. Nobody is
+   offered a draft.
+
+2. Download the draft's installers and test them. An installed copy of the
+   previous version won't offer the draft, so install it directly.
+
+3. Write the release notes on the draft. The update banner links to them.
+
+4. Publish:
+
+   ```sh
+   scripts/publish-release.sh v0.4.0
+   ```
+
+   The script checks that all eight installers are attached, each with the
+   SHA-256 digest GitHub records. It attaches `update.json` (the version, the
+   notes and each installer's digest), then publishes the release and marks it
+   latest. From then on, running copies see the update. They check about 8
+   seconds after starting, then every 6 hours, and anyone can use **Check for
+   Updates…** (the app menu on macOS, the Help menu elsewhere).
+
+To pull a bad release, mark the previous one as latest
+(`gh release edit v0.3.9 --latest`) or turn the bad one back into a draft.
+Copies that already updated stay on it. Nothing downgrades them.
+
+## How a copy updates itself
+
+`app/updater.js` reads `update.json` from
+`github.com/saphid/frame-control/releases/latest/download/`. It falls back to the
+REST API only when a release has no manifest, because the API allows just 60
+unauthenticated requests an hour per IP address, shared by a whole household.
+Then it downloads the installer for its platform and checks it
+against the SHA-256 digest GitHub publishes for the asset. It refuses if the
+digest is missing or doesn't match. Then:
+
+| Installed from | Update |
+|---|---|
+| macOS `.dmg`, app in a writable folder such as Applications | The `.zip` is unpacked next to the app and its version checked. After the app quits, a small script swaps the new app in, putting the old one back if that fails, and reopens it. Updates don't get the download quarantine, so there's no `xattr` step. |
+| Windows installer | The new `Setup` runs silently over the install (`/S --force-run`) and reopens the app. |
+| Linux AppImage | The new AppImage replaces the old file and is started. |
+| macOS app still on the disk image or translocated, Windows `.zip`, Linux `.deb` | The banner opens the release page instead. |
+
+Version 0.3.1 and earlier have no updater, so people on them have to download
+the new version once by hand.

docs/streaming.md

@@ -5,6 +5,8 @@ This covers three directions, plus input:
 - **A. Frame → Mac**: see and control the headset from the Mac.
 - **B. Mac → Frame**: use the Mac's desktop inside the headset.
 - **C. iPhone → Frame**: mirror the phone inside the headset.
+- **PC VR from Linux**: [feasibility and options](linux-vr-streaming.md),
+  including Valve's streaming and USB support. No Linux host tested yet.
 - **Input**: type and point in the Frame from the Mac or iPhone.
 
 The confidence labels are the same as in [ssh.md](ssh.md).
@@ -24,11 +26,13 @@ Mac with keyboard, mouse, and clipboard.
 
 ## B. Show the Mac's desktop inside the Frame
 
-The Frame's streaming features are built around a **Windows PC running
-SteamVR** plus the USB Wi-Fi 6E dongle. Even Linux hosts had VR-streaming
-problems at launch
+The Frame's VR streaming uses **SteamVR** on the host. Linux hosts had
+VR-streaming problems at launch
 ([Steam discussion](https://steamcommunity.com/app/4165890/discussions/0/528765047224280796/),
 [gbl08ma](https://gbl08ma.com/posts/steam-frame-a-linux-machine-doesnt-support-linux/)).
+Valve's later 2.17.8 notes explicitly describe Steam Link fixes on Linux and
+initial USB streaming support (**documented**, not tested from a Linux host
+here). See [the current comparison](linux-vr-streaming.md#a-valves-own-path--recommended-first).
 **macOS isn't a supported SteamVR host**, so for the Mac we're only looking at
 flat 2D desktop streaming into a window on the Frame's Linux desktop.
 

docs/vr-apks.md

@@ -0,0 +1,148 @@
+# VR APKs and Quest games in Lepton
+
+What it takes to run an immersive (OpenXR) Android app, including Meta Quest
+builds, on the Frame. Checked on SteamOS BUILD_ID 20260925.6191901, Lepton
+v2.8.14 (rootfs v2.8.11), SteamVR 2.18.1, on 2026-09-28, unless marked
+**inferred**.
+
+## How a VR APK reaches SteamVR (verified)
+
+- Lepton ships a standard Khronos system runtime manifest,
+  `/vendor/etc/openxr/1/active_runtime.json`, pointing at SteamVR's Android
+  client, `/data/steamvr/runtime/bin/androidarm64/vrclient.so`. That is the
+  host's `/opt/steamvr/bin/androidarm64/`, bind-mounted in.
+- An APK's own Khronos-style `libopenxr_loader.so` tries the runtime brokers
+  (`org.khronos.openxr.runtime_broker`, `…system_runtime_broker`), finds
+  neither, then falls back to that manifest. Nothing in the APK has to change
+  for discovery.
+- Install the APK without the flatscreen marker
+  (`python3 ui/frame_android.py install app.apk --vr`). The marker only
+  controls Lepton's 2D Android surface; the app itself has to start an
+  OpenXR session.
+- Lepton also loads Valve's `XR_APILAYER_VALVE_fdm_injection` layer from
+  `/vendor/etc/openxr/1/api_layers/implicit.d/`. Only layers in Valve's own
+  directories are picked up (`liblepton/vulkan_layers.sh`), so a third-party
+  layer has to ship inside the APK.
+
+**Open Brush 2.32.29, the Quest APK from its GitHub release (Unity OpenXR,
+Vulkan), works unmodified.** Its manifest already has `LAUNCHER` next to
+`com.oculus.intent.category.VR`. Unity asked for OpenXR 1.1, got
+`XR_ERROR_API_VERSION_UNSUPPORTED`, retried with 1.0 and succeeded. SteamVR
+took it as the scene app, created Touch, simple-controller and Frame-controller
+bindings, and the session reached `XR_SESSION_STATE_FOCUSED`. A headset capture
+(`ui/frame_vrshot.py`, after waking the compositor and closing the dashboard)
+showed a dark sky over a mountain horizon; nobody wore the headset to confirm
+it was Open Brush's scene or to try drawing.
+
+**Khronos `hello_xr` (Vulkan, 1.1.63 release APK) works unmodified:**
+`Instance RuntimeName=SteamVR/OpenXR RuntimeVersion=2.18.1`, 1728×1728
+swapchains per eye, session `IDLE → READY → SYNCHRONIZED` (the headset was
+not being worn, so it did not reach `FOCUSED`).
+
+## What SteamVR's Android runtime supports (verified, from `vrclient.so`)
+
+- **OpenXR 1.0 only.** An app requesting `XR_API_VERSION_1_0` works; one
+  requesting 1.1 (`XR_CURRENT_API_VERSION` in a 1.1 SDK) gets
+  `XR_ERROR_API_VERSION_UNSUPPORTED` from the runtime.
+- Extensions include `XR_KHR_opengl_es_enable`, `XR_KHR_vulkan_enable{,2}`,
+  `XR_KHR_composition_layer_depth`, `XR_KHR_locate_spaces`,
+  `XR_EXT_local_floor`, `XR_EXT_uuid`, `XR_EXT_palm_pose`,
+  `XR_EXT_hand_tracking`, `XR_EXT_eye_gaze_interaction`, and these Meta ones:
+  `XR_FB_display_refresh_rate`, `XR_FB_foveation{,_configuration,_vulkan}`,
+  `XR_FB_space_warp`, `XR_FB_swapchain_update_state`,
+  `XR_META_foveation_eye_tracked`, `XR_META_recommended_layer_resolution`,
+  `XR_META_vulkan_swapchain_create_info`, `XR_META_performance_metrics`.
+- Not present: `XR_FB_passthrough`, `XR_FB_hand_tracking_*`,
+  `XR_FB_spatial_entity*`, `XR_FB_color_space`,
+  `XR_KHR_android_thread_settings`, `XR_OCULUS_*`.
+- Interaction profiles include `oculus/touch_controller`, `khr/simple_controller`,
+  `valve/frame_controller` and the usual PC controllers. Valve documents Touch
+  bindings as a working fallback on the Frame controllers.
+
+## What stops a Quest APK (verified with Wolvic 1.9, `oculusvr` build)
+
+1. **Lepton won't start it.** Lepton's `apk-info-extractor` only accepts an
+   activity whose intent filter has `android.intent.action.MAIN` and
+   `android.intent.category.LAUNCHER`. Quest apps use
+   `com.oculus.intent.category.VR` instead, so Lepton logs `APP_ACTIVITY is
+   empty` and exits. There is no override. **Fix:** add the `LAUNCHER`
+   category to that intent filter and re-sign. After that, Wolvic started.
+2. **OpenXR 1.1.** Wolvic's Quest build then requested OpenXR 1.1 and aborted
+   on `XR_ERROR_API_VERSION_UNSUPPORTED`. Unity's OpenXR plugin retries with
+   1.0 (Open Brush, above), so this mostly bites native and non-Unity apps. **Fix (inferred):** an API layer
+   inside the APK that asks the runtime for 1.0 and maps the 1.1 core
+   functions to the extensions the runtime does have (`XR_KHR_locate_spaces`,
+   `XR_EXT_local_floor`, `XR_EXT_uuid`, `XR_EXT_palm_pose`).
+3. **Lepton's missing clipboard service** still applies to VR apps. The Godot
+   XR Tools demo's Quest build (itch.io) dies in `Godot.<init>` casting the
+   null clipboard service to `ClipboardManager`, before any OpenXR call. See
+   the clipboard table in [apks.md](apks.md).
+4. **Not yet reached:** required Meta-only extensions (each app differs),
+   swapchain formats (the Lynx Wolvic build needed `GL_SRGB8_ALPHA8`), and
+   Meta platform services.
+
+The loader was never the problem: Wolvic's Quest `libopenxr_loader.so` is a
+Khronos-style loader and found SteamVR through `/vendor`.
+
+## Out of scope
+
+- **Meta entitlement.** Apps that call the Oculus Platform SDK
+  (`libovrplatformloader.so`) to check the Quest store licence need Meta's
+  services. Frame Control won't work around that.
+- **VrApi-era apps** (`libvrapi.so`, before OpenXR) need an API translator,
+  not a patch.
+
+## Frame Control does this for you
+
+APK uploads and `python3 ui/frame_android.py install app.apk` detect VR
+manifest categories, Samsung's `vr_only` flag and the arm64 OpenXR loader.
+VR apps default to immersive mode without the flatscreen marker. The upload
+selector or CLI `--flat` / `--vr` overrides that choice. Compatibility notes
+identify legacy VrApi, Meta platform SDK and OpenXR libraries.
+
+Lepton only starts an `<activity>` whose MAIN intent filter has LAUNCHER; it
+ignores `<activity-alias>`, which is where Godot 4 exports put LAUNCHER. When no
+real activity qualifies, Frame Control adds LAUNCHER to the VR activity's MAIN
+filter, or to the activity the launcher alias targets, then repacks and v2-signs
+the APK locally before copying it; `meta.json` records
+`"patched": ["launcher"]`. Unchanged ZIP members retain their compressed
+bytes; stored libraries are aligned to 16 KiB. The RSA signing identity lives
+in Frame Control's per-user app-data directory as `apk-signing-key.json`
+(mode 0600). Keep this key to preserve the signer on subsequent patched
+updates. A re-signed APK cannot update an installation signed by its original
+publisher; Android also treats it as a different signer for signature checks.
+
+VR apps with an arm64 OpenXR loader also get the OpenXR compatibility layer
+([frame/openxr-compat](../frame/openxr-compat/README.md)): an implicit API
+layer in the APK's `assets/openxr/1/api_layers/implicit.d/`, which the app's
+own loader picks up next to Valve's layer. It asks SteamVR for OpenXR 1.0 when
+the app wants 1.1 and enables the extensions that became 1.1 core; maps
+`xrLocateSpaces` to `xrLocateSpacesKHR` and `grip_surface` to `palm_ext`; drops
+1.1 controller profiles SteamVR doesn't know; stubs
+`XR_KHR_android_thread_settings` and `XR_OCULUS_android_session_state_enable`;
+and keeps the current refresh rate when SteamVR refuses a requested one.
+`meta.json` records `"patched": ["openxr-compat"]`. Skip it with
+`install … --no-xr-compat`. Its decisions go to logcat under `FrameXrCompat`.
+
+Verified on the headset (2026-09-28):
+
+- **Wolvic 1.9, Quest build**, installed as downloaded: Frame Control added
+  `LAUNCHER` and the layer. The layer turned OpenXR 1.1.48 into 1.0.63, the
+  instance and session were created, and a 144 Hz refresh request that SteamVR
+  refused was kept at the current rate. The session reached `SYNCHRONIZED`;
+  then Wolvic's Gecko engine crashed (null SIGSEGV on its Gecko thread, the
+  same crash its Lynx build has), which is Wolvic's, not OpenXR's.
+- **Open Brush, Quest build**, with the layer: 1.1.54 → 1.0.63, the thread
+  settings stub in use, `bytedance/pico4_controller` bindings dropped, and the
+  session reached `FOCUSED`, the same as without the layer.
+
+Inspect or prepare an APK without contacting the headset:
+
+```sh
+python3 ui/frame_android.py info app.apk
+python3 ui/frame_android.py patch app.apk patched.apk
+python3 ui/frame_android.py patch app.apk patched.apk --add assets/openxr/1/api_layers/implicit.d/X.json=X.json --add lib/arm64-v8a/libX.so=libX.so
+```
+
+The patch fixes Lepton's launch-category requirement. It does not supply an
+OpenXR 1.1 translation layer, Meta services or a VrApi implementation.

frame/openxr-compat/.gitattributes

@@ -0,0 +1,2 @@
+# Preserve upstream headers byte-for-byte, including their existing whitespace.
+vendor/** -whitespace

frame/openxr-compat/.gitignore

@@ -0,0 +1 @@
+/build-*/

frame/openxr-compat/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.22)
+project(FrameXrCompat LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+add_library(compat_logic INTERFACE)
+target_include_directories(compat_logic INTERFACE . vendor)
+if(ANDROID)
+  add_library(XrApiLayer_FRAME_compat SHARED layer.cpp)
+  target_link_libraries(XrApiLayer_FRAME_compat PRIVATE compat_logic log)
+  target_compile_definitions(XrApiLayer_FRAME_compat PRIVATE XR_USE_PLATFORM_ANDROID XR_NO_PROTOTYPES)
+  target_compile_options(XrApiLayer_FRAME_compat PRIVATE -O2 -fvisibility=hidden -Wall -Wextra -Werror)
+  target_link_options(XrApiLayer_FRAME_compat PRIVATE -Wl,-z,max-page-size=16384 -Wl,--no-undefined -Wl,--exclude-libs,ALL -Wl,-s)
+else()
+  enable_testing()
+  add_executable(compat_tests tests/compat_tests.cpp)
+  target_link_libraries(compat_tests PRIVATE compat_logic)
+  target_compile_options(compat_tests PRIVATE -Wall -Wextra -Werror)
+  add_test(NAME compat_logic COMMAND compat_tests)
+  add_executable(dispatch_tests tests/dispatch_tests.cpp)
+  target_link_libraries(dispatch_tests PRIVATE compat_logic)
+  target_include_directories(dispatch_tests PRIVATE tests/shims)
+  target_compile_definitions(dispatch_tests PRIVATE XR_USE_PLATFORM_ANDROID XR_NO_PROTOTYPES)
+  target_compile_options(dispatch_tests PRIVATE -Wall -Wextra -Werror)
+  add_test(NAME layer_dispatch COMMAND dispatch_tests)
+endif()

frame/openxr-compat/README.md

@@ -0,0 +1,254 @@
+# Frame OpenXR compatibility API layer
+
+`XR_APILAYER_FRAME_compat` is an APK-local implicit API layer for Steam Frame's
+OpenXR 1.0 Android runtime. It translates selected 1.1 functionality; it is not
+a conformant replacement for a complete 1.1 runtime. Device facts are in
+[../../docs/vr-apks.md](../../docs/vr-apks.md). No headset was contacted during
+implementation. Loading, Valve-layer coexistence, controller usability, and
+Wolvic startup/rendering on Lepton remain **unverified on device**.
+
+## Behavior
+
+- The negotiated `createApiLayerInstance` hook handles `xrCreateInstance`.
+  API requests >= 1.1 become `XR_API_VERSION_1_0` (1.0.63 with these headers),
+  rather than carrying an arbitrary application's patch into the 1.0 request.
+  Requests below 1.1 are unchanged. The loader may reject future API versions
+  before any layer runs.
+- Enumerate downstream extensions through the **next layer's** GIPA before
+  creation. Only advertised promoted extensions are added, with duplicates
+  removed. All other application extensions remain, except the two stubs below.
+  Log added, stubbed and missing extensions with tag `FrameXrCompat`.
+- Missing `XR_KHR_android_thread_settings` is advertised and accepted;
+  `xrSetAndroidApplicationThreadKHR` logs and returns success without changing
+  thread scheduling. Missing `XR_OCULUS_android_session_state_enable` is
+  advertised and accepted, with no commands or additional session behavior.
+  If downstream supports either extension, preserve it and its real commands.
+  Stubbing these capabilities is intentionally limited to accepting the app's
+  request; it does not provide Meta services.
+- The manifest's `instance_extensions` makes both stubs visible during the
+  loader's pre-instance enumeration and validation. The layer also exposes
+  an enumeration implementation with count/capacity handling. Before a next
+  dispatch is available it can enumerate only its own extensions; normal app
+  global enumeration is performed by the loader, merging runtime and manifest
+  entries. See [loader_core.cpp L106–145](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/loader_core.cpp#L106)
+  and [manifest parsing L549–558](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/manifest_file.cpp#L549).
+- Unknown missing extensions are never silently removed. Khronos may reject
+  them **before** entering the layer and name them in `OpenXR-Loader` logs
+  ([loader_instance.cpp L149–176](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/loader_instance.cpp#L149)).
+  If they reach this layer, it logs their names and preserves them for the
+  downstream failure.
+- `xrLocateSpaces` dispatches to `xrLocateSpacesKHR` per session/instance.
+  This is the only command added in 1.1. The three relevant structure types
+  (`SPACES_LOCATE_INFO`, `SPACE_LOCATIONS`, `SPACE_VELOCITIES`) and their KHR
+  versions are **numeric aliases**, and the structs are typedef aliases in
+  these headers. Explicit type conversion of local input/output copies is
+  therefore an identity conversion; the velocity chain passes through without
+  mutating its types or linkage. Output arrays remain shared and receive the
+  runtime's results, including on error; caller struct headers remain intact.
+- With palm pose enabled, rewrite both hand paths ending in
+  `/input/grip_surface/pose` to `/input/palm_ext/pose` in `xrStringToPath` and
+  in binding suggestions (including paths obtained before this layer rewrote
+  them). Unknown paths are left alone.
+- `xrGetInstanceProperties` and unrelated commands pass through. The real
+  runtime's identity is not spoofed. Dispatch tables and session ownership are
+  locked, and removed after successful destruction. Downstream calls occur
+  outside the lock.
+
+## Spec basis and interaction profiles
+
+The pinned [1.1 promotions appendix, versions.adoc L16–156](https://github.com/KhronosGroup/OpenXR-Docs/blob/release-1.1.63/specification/sources/chapters/versions.adoc#L16)
+includes a generated promotion list. Its source is the
+[1.1.63 XML registry](https://github.com/KhronosGroup/OpenXR-Docs/blob/release-1.1.63/specification/registry/xr.xml),
+selecting `extension[@promotedto='XR_VERSION_1_1']`. The full list implemented:
+
+| Promoted extension | Handling |
+| --- | --- |
+| `XR_KHR_locate_spaces` | Enable if advertised; core command alias |
+| `XR_EXT_local_floor` | Enable if advertised; reference-space enum is an alias |
+| `XR_EXT_uuid` | Enable if advertised; type alias, no commands |
+| `XR_EXT_palm_pose` | Enable if advertised; rewrite grip-surface paths |
+| `XR_VARJO_quad_views` | Enable if advertised; view-configuration enum alias, support remains optional |
+| `XR_EXT_samsung_odyssey_controller` | Enable if advertised |
+| `XR_EXT_hp_mixed_reality_controller` | Enable if advertised |
+| `XR_HTC_vive_cosmos_controller_interaction` | Enable if advertised |
+| `XR_HTC_vive_focus3_controller_interaction` | Enable if advertised |
+| `XR_ML_ml2_controller_interaction` | Enable if advertised |
+| `XR_FB_touch_controller_pro` | Enable if advertised; old profile still usable |
+| `XR_META_touch_controller_plus` | Enable if advertised; old profile still usable |
+| `XR_BD_controller_interaction` | Enable if advertised |
+| `XR_KHR_maintenance1` | Enable if advertised (included in the pinned registry's promotion list) |
+
+`XR_EXT_hand_interaction` is **not** promoted to 1.1. Preserve it if requested;
+it is not auto-enabled merely because the runtime advertises it. The parent
+provided its availability; the device notes list extensions non-exhaustively.
+
+The registry's `XR_VERSION_1_1` feature introduces 13 profile paths. For
+Samsung Odyssey, HP mixed reality, HTC Cosmos/Focus3, ML2 and the three
+ByteDance Pico profiles, drop a whole suggestion call with success when the
+corresponding extension is absent. Keep it when the extension is enabled.
+Drop the five new Meta paths: `touch_pro_controller`, `touch_plus_controller`,
+`touch_controller_rift_cv1`, `touch_controller_quest_1_rift_s`, and
+`touch_controller_quest_2`. The verified runtime notes do not list these;
+Pro/Plus promotion also renames several components, so the old extension's
+presence alone does not prove support for the new profile. This layer does
+not implement those component conversions. Existing old Pro/Plus profile
+paths are passed through if the app uses them.
+
+Preserve the documented `oculus/touch_controller`, `khr/simple_controller`,
+`valve/frame_controller` and original PC profile paths. The notes' "usual PC
+controllers" is not a complete enumerated list: availability of promoted PC
+profiles is inferred from the runtime's extension advertisement, not invented
+from that phrase. OpenXR has no general profile enumeration API. Dropping
+suggestions prevents an unsupported 1.1 profile from aborting initialization;
+it does not create bindings, so the app must also suggest a supported fallback.
+
+## Headers and licensing
+
+The required public headers (`openxr.h`, `openxr_platform.h`,
+`openxr_platform_defines.h`) are unmodified from
+[OpenXR-SDK release-1.1.63](https://github.com/KhronosGroup/OpenXR-SDK/tree/release-1.1.63/include/openxr),
+commit [f2448a8](https://github.com/KhronosGroup/OpenXR-SDK/commit/f2448a8797c85814aa892efc1ab8707900fbcc78).
+The requested filename `loader_interfaces.h` no longer exists in 1.1 SDK
+releases: negotiation was ratified and moved to `openxr_loader_negotiation.h`
+in 1.0.33 ([spec history L166–186](https://github.com/KhronosGroup/OpenXR-Docs/blob/release-1.1.63/specification/sources/chapters/versions.adoc#L166)).
+To retain that requested interface filename, the layer uses the unmodified,
+ABI-compatible [last legacy header from SDK-Source release-1.0.32](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.0.32/src/common/loader_interfaces.h).
+Only these four headers are vendored. They offer Apache-2.0 OR MIT; this
+vendoring uses Apache-2.0, reproduced in [vendor/LICENSE](vendor/LICENSE).
+
+## Android discovery and coexistence
+
+**Minimum asset-discovery loader release: 1.0.25 (2022-09-02).** Its
+[release commit, 15c3d8e](https://github.com/KhronosGroup/OpenXR-SDK-Source/commit/15c3d8eb99994e5365d6b6f96eefaf4c51a65a9d)
+explicitly announces APK-packaged API layers;
+[manifest_file.cpp L665–723](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.0.25/src/loader/manifest_file.cpp#L665)
+implements discovery, and [L934–940](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.0.25/src/loader/manifest_file.cpp#L934)
+adds asset manifests after filesystem manifests. This is not a 1.1-only feature.
+
+**For an app requesting API 1.1, use a 1.1 loader (first release 1.1.36) or
+newer.** A 1.0 loader rejects the request before the layer can downgrade it;
+see [loader_core.cpp L217–230](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/loader_core.cpp#L217).
+The runtime can remain 1.0.
+
+Source inspection at release-1.1.63 confirms:
+
+- [manifest_file.cpp L720–783](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/manifest_file.cpp#L720)
+  uses the initialized Android asset manager and scans
+  `openxr/1/api_layers/implicit.d/` for JSON. The application must initialize
+  the loader with its Android context (`xrInitializeLoaderKHR`). In the APK,
+  the entry is `assets/openxr/1/api_layers/implicit.d/XrApiLayer_FRAME_compat.json`.
+- A bare `library_path`, as used here, is **not explicitly concatenated** with
+  `nativeLibraryDir`. [L878–900](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/manifest_file.cpp#L878)
+  leaves a bare name for normal dynamic-linker search in the application's
+  namespace (including its native library directory). Relative paths with a
+  slash use [LocateLibraryInAssets L943–952](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/manifest_file.cpp#L943),
+  which resolves against `GetAndroidNativeLibraryDir()`.
+  [loader_init_data.cpp L87–96](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/loader_init_data.cpp#L87)
+  obtains the asset manager and `ApplicationInfo.nativeLibraryDir` via JNI.
+  Wolvic's supplied manifest has `android:extractNativeLibs="true"`.
+- [android_utilities.cpp L267–322](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/android_utilities.cpp#L267)
+  handles runtime broker discovery, not APK layer discovery. Its
+  `native_lib_dir + so_filename` and `dlopen` refer to the runtime package.
+  They must not be confused with the app's layer library resolution.
+- [manifest_file.cpp L1008–1023](https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/release-1.1.63/src/loader/manifest_file.cpp#L1008)
+  retains filesystem manifests and then appends asset manifests. This leaves
+  `/vendor`'s `XR_APILAYER_VALVE_fdm_injection` discoverable. This layer advances
+  `nextInfo` exactly once, uses next-layer GIPA, preserves the rest of the
+  create-info chain and never opens `vrclient.so` directly. No environment
+  layer-list override or assumed ordering is needed.
+
+`DISABLE_FRAME_XR_COMPAT` is the manifest's disable environment variable.
+Leave it unset to activate the implicit layer. No `enable_environment` is
+required.
+
+## Rebuild and verify
+
+NDK **r30 / 30.0.16248370**, installed at
+`~/Library/Android/ndk/30.0.16248370`, was the latest stable/LTS package shown
+by the [Android download page](https://developer.android.com/ndk/downloads)
+on 2026-09-28. Downloaded
+[android-ndk-r30-darwin.dmg](https://dl.google.com/android/repository/android-ndk-r30-darwin.dmg)
+(1,072,970,961 bytes). The page publishes SHA-1, not SHA-256:
+
+```
+expected: 48591224b6657f46eebbc9d95d4af09bbed8d107
+actual:   48591224b6657f46eebbc9d95d4af09bbed8d107  (PASS)
+```
+
+Mounted read-only with `hdiutil`; copied
+`AndroidNDK16248370.app/Contents/NDK` into that version directory. Despite the
+`darwin-x86_64` toolchain directory name, clang is universal arm64/x86_64 and
+ran on this Apple Silicon Mac.
+
+```sh
+frame/openxr-compat/build.sh
+# Or set ANDROID_NDK_HOME to an installed NDK.
+cmake -S frame/openxr-compat -B frame/openxr-compat/build-host -G Ninja
+cmake --build frame/openxr-compat/build-host
+ctest --test-dir frame/openxr-compat/build-host --output-on-failure
+```
+
+The script produces arm64-v8a / android-24, C++17, `-O2`, static libc++, hidden
+internal symbols, stripped output, and `-Wl,-z,max-page-size=16384`.
+The committed prebuilt is `prebuilt/arm64-v8a/libXrApiLayer_FRAME_compat.so`.
+Its SHA-256 is recorded below with the APK checks.
+
+[Host test output](evidence/ctest.txt): two tests passed, covering pure logic
+and the actual layer with a fake next layer and host-only log/JNI shims.
+[Full llvm-readelf -d -s -l output](evidence/readelf.txt) records three LOAD
+segments aligned `0x4000`, only `xrNegotiateLoaderApiLayerInterface` exported,
+and only `libc.so`, `libm.so`, `libdl.so`, `liblog.so` as NEEDED libraries.
+All 46 undefined imports are versioned `@LIBC` except `__android_log_print`.
+There is no `libc++_shared.so` dependency and no unstripped `.symtab`.
+
+No independent model review was run: the task explicitly prohibits delegation.
+No `CODING_STANDARDS.md` exists in this worktree or the primary worktree.
+
+## Wolvic injection artifact (Mac only)
+
+Copied `/tmp/vrapk/wq-dec` to `/tmp/vrapk/wq-layer-dec`; retained its existing
+LAUNCHER fix and native-library extraction setting. Added only:
+
+```
+assets/openxr/1/api_layers/implicit.d/XrApiLayer_FRAME_compat.json
+lib/arm64-v8a/libXrApiLayer_FRAME_compat.so
+```
+
+Built using `/tmp/vrapk/jdk/Contents/Home/bin/java` and
+`/tmp/vrapk/apktool_3.0.3.jar`, then signed in place using
+`/tmp/vrapk/uber-apk-signer-1.3.0.jar --overwrite` (embedded debug certificate):
+
+```sh
+/tmp/vrapk/jdk/Contents/Home/bin/java -jar /tmp/vrapk/apktool_3.0.3.jar \
+  b /tmp/vrapk/wq-layer-dec -o /tmp/vrapk/wolvic-quest-compat.apk
+/tmp/vrapk/jdk/Contents/Home/bin/java -jar /tmp/vrapk/uber-apk-signer-1.3.0.jar \
+  -a /tmp/vrapk/wolvic-quest-compat.apk --overwrite
+/tmp/vrapk/jdk/Contents/Home/bin/java -jar /tmp/vrapk/uber-apk-signer-1.3.0.jar \
+  -a /tmp/vrapk/wolvic-quest-compat.apk --onlyVerify
+```
+
+Final APK: `/tmp/vrapk/wolvic-quest-compat.apk` (not committed).
+The bundled `lib/arm64-v8a/libopenxr_loader.so` is byte-for-byte unchanged.
+Its strings include both `openxr/1/api_layers/implicit.d/` and
+`openxr/1/api_layers/explicit.d/`, `AddManifestFilesAndroid` error messages,
+and `xrLocateSpaces`. Thus it contains APK asset discovery and evidence of
+1.1 command support. Its exact upstream release number was not established
+from the binary; runtime execution of those paths remains unverified.
+
+Prebuilt library SHA-256:
+
+```
+479d31c374f137906e03f73209b581d65d7e6a41b8476e6425fa55a6aa40bd68
+```
+
+APK SHA-256:
+
+```
+355a681625e38b71563dcffecb031799eff27894d6ab910a659bace057e82c1f
+```
+
+Final `--onlyVerify` exited 0: zip alignment verified, v2/v3 signatures
+verified, one APK processed and zero errors. ZIP readback confirmed that the
+injected library and manifest match the committed inputs, the loader is
+unchanged, and the binary Android manifest retains the LAUNCHER category.
+See [APK verification evidence](evidence/apk-verification.txt).

frame/openxr-compat/XrApiLayer_FRAME_compat.json

@@ -0,0 +1,21 @@
+{
+  "file_format_version": "1.0.0",
+  "api_layer": {
+    "name": "XR_APILAYER_FRAME_compat",
+    "library_path": "libXrApiLayer_FRAME_compat.so",
+    "api_version": "1.1",
+    "implementation_version": "1",
+    "description": "Steam Frame OpenXR 1.1 to 1.0 compatibility",
+    "disable_environment": "DISABLE_FRAME_XR_COMPAT",
+    "instance_extensions": [
+      {
+        "name": "XR_KHR_android_thread_settings",
+        "extension_version": "6"
+      },
+      {
+        "name": "XR_OCULUS_android_session_state_enable",
+        "extension_version": "1"
+      }
+    ]
+  }
+}

frame/openxr-compat/build.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+set -eu
+here=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+ndk=${ANDROID_NDK_HOME:-"$HOME/Library/Android/ndk/30.0.16248370"}
+cmake -S "$here" -B "$here/build-android" -G Ninja \
+  -DCMAKE_TOOLCHAIN_FILE="$ndk/build/cmake/android.toolchain.cmake" \
+  -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-24 \
+  -DANDROID_STL=c++_static -DCMAKE_BUILD_TYPE=Release
+cmake --build "$here/build-android"
+mkdir -p "$here/prebuilt/arm64-v8a"
+cp "$here/build-android/libXrApiLayer_FRAME_compat.so" "$here/prebuilt/arm64-v8a/"
+shasum -a 256 "$here/prebuilt/arm64-v8a/libXrApiLayer_FRAME_compat.so"

frame/openxr-compat/compat_logic.h

@@ -0,0 +1,88 @@
+#pragma once
+#include <openxr/openxr.h>
+#include <algorithm>
+#include <string>
+#include <vector>
+
+namespace frame {
+using Names = std::vector<std::string>;
+inline constexpr const char* layerName = "XR_APILAYER_FRAME_compat";
+inline constexpr const char* stubs[] = {"XR_KHR_android_thread_settings", "XR_OCULUS_android_session_state_enable"};
+// OpenXR-Docs release-1.1.63 registry: promotedto="XR_VERSION_1_1".
+inline constexpr const char* promotions[] = {
+    "XR_KHR_locate_spaces", "XR_EXT_local_floor", "XR_EXT_uuid", "XR_EXT_palm_pose",
+    "XR_VARJO_quad_views", "XR_EXT_samsung_odyssey_controller", "XR_EXT_hp_mixed_reality_controller",
+    "XR_HTC_vive_cosmos_controller_interaction", "XR_HTC_vive_focus3_controller_interaction",
+    "XR_ML_ml2_controller_interaction", "XR_FB_touch_controller_pro", "XR_META_touch_controller_plus",
+    "XR_BD_controller_interaction", "XR_KHR_maintenance1"};
+inline bool has(const Names& names, const std::string& n) {
+    return std::find(names.begin(), names.end(), n) != names.end();
+}
+inline bool downgrade(XrVersion v) { return v >= XR_MAKE_VERSION(1, 1, 0); }
+inline XrVersion runtimeVersion(XrVersion v) { return downgrade(v) ? XR_API_VERSION_1_0 : v; }
+struct ExtensionPlan { Names downstream, stubbed, missing, added; };
+inline ExtensionPlan extensions(const Names& requested, const Names& available, bool promote) {
+    ExtensionPlan p;
+    for (const auto& n : requested) {
+        if (!has(available, n) && (n == stubs[0] || n == stubs[1])) p.stubbed.push_back(n);
+        else {
+            if (!has(p.downstream, n)) p.downstream.push_back(n);
+            if (!has(available, n)) p.missing.push_back(n);
+        }
+    }
+    if (promote) for (auto n : promotions) if (has(available, n) && !has(p.downstream, n)) {
+        p.downstream.push_back(n); p.added.push_back(n);
+    }
+    return p;
+}
+// 1.1's grip_surface is XR_EXT_palm_pose's palm_ext renamed (same pose), not the grip pose.
+inline std::string rewritePath(std::string p, bool palm) {
+    const std::string suffix = "/input/grip_surface/pose";
+    if (palm && (p == "/user/hand/left" + suffix || p == "/user/hand/right" + suffix))
+        p.replace(p.size() - suffix.size(), suffix.size(), "/input/palm_ext/pose");
+    return p;
+}
+// Profiles added to 1.1. The three legacy Meta splits have no 1.0 extension.
+// The renamed Pro/Plus profiles have different component semantics; do not
+// claim the old extension implements the new profile merely because it exists.
+inline bool dropProfile(const std::string& p, const Names& enabled) {
+    for (auto name : {"touch_pro_controller", "touch_plus_controller", "touch_controller_rift_cv1",
+                      "touch_controller_quest_1_rift_s", "touch_controller_quest_2"})
+        if (p == std::string("/interaction_profiles/meta/") + name) return true;
+    const char* profiles[][2] = {
+        {"samsung/odyssey_controller", "XR_EXT_samsung_odyssey_controller"},
+        {"hp/mixed_reality_controller", "XR_EXT_hp_mixed_reality_controller"},
+        {"htc/vive_cosmos_controller", "XR_HTC_vive_cosmos_controller_interaction"},
+        {"htc/vive_focus3_controller", "XR_HTC_vive_focus3_controller_interaction"},
+        {"ml/ml2_controller", "XR_ML_ml2_controller_interaction"},
+        {"bytedance/pico_neo3_controller", "XR_BD_controller_interaction"},
+        {"bytedance/pico4_controller", "XR_BD_controller_interaction"},
+        {"bytedance/pico_g3_controller", "XR_BD_controller_interaction"}};
+    for (auto& entry : profiles) if (p == std::string("/interaction_profiles/") + entry[0])
+        return !has(enabled, entry[1]);
+    return false;
+}
+inline XrStructureType extensionType(XrStructureType t) {
+    switch (t) {
+    case XR_TYPE_SPACES_LOCATE_INFO: return XR_TYPE_SPACES_LOCATE_INFO_KHR;
+    case XR_TYPE_SPACE_LOCATIONS: return XR_TYPE_SPACE_LOCATIONS_KHR;
+    case XR_TYPE_SPACE_VELOCITIES: return XR_TYPE_SPACE_VELOCITIES_KHR;
+    default: return t;
+    }
+}
+inline XrResult locate(PFN_xrLocateSpacesKHR next, XrSession session,
+                       const XrSpacesLocateInfo* info, XrSpaceLocations* locations) {
+    if (!info || !locations) return XR_ERROR_VALIDATION_FAILURE;
+    static_assert(XR_TYPE_SPACE_VELOCITIES == XR_TYPE_SPACE_VELOCITIES_KHR);
+    static_assert(XR_TYPE_SPACE_LOCATIONS == XR_TYPE_SPACE_LOCATIONS_KHR);
+    static_assert(XR_TYPE_SPACES_LOCATE_INFO == XR_TYPE_SPACES_LOCATE_INFO_KHR);
+    auto in = *info;
+    auto out = *locations;
+    in.type = extensionType(in.type); out.type = extensionType(out.type);
+    // The enums and typedefs are exact aliases. All chained velocities,
+    // including unknown next structures, can be forwarded without mutation.
+    const auto result = next(session, &in, &out);
+    locations->locationCount = out.locationCount;
+    return result;
+}
+}

frame/openxr-compat/evidence/apk-verification.txt

@@ -0,0 +1,29 @@
+2026-09-28, Mac only; no device connection.
+APK: /tmp/vrapk/wolvic-quest-compat.apk
+SHA-256: 355a681625e38b71563dcffecb031799eff27894d6ab910a659bace057e82c1f
+
+Command:
+/tmp/vrapk/jdk/Contents/Home/bin/java -jar /tmp/vrapk/uber-apk-signer-1.3.0.jar -a /tmp/vrapk/wolvic-quest-compat.apk --onlyVerify
+Exit status: 0
+Relevant output:
+- zipalign verified
+- signature verified [v2, v3]
+Successfully processed 1 APKs and 0 errors in 0.63 seconds.
+
+ZIP readback checks: PASS
+- Injected JSON identical to frame/openxr-compat/XrApiLayer_FRAME_compat.json.
+- Injected SO identical to prebuilt/arm64-v8a/libXrApiLayer_FRAME_compat.so.
+- Existing libopenxr_loader.so identical to /tmp/vrapk/wq-dec version.
+- Binary AndroidManifest.xml contains android.intent.category.LAUNCHER.
+
+Loader strings present:
+openxr/1/api_layers/implicit.d/
+openxr/1/api_layers/explicit.d/
+ApiLayerManifestFile::AddManifestFilesAndroid unable to open asset
+xrLocateSpaces
+
+NDK: 30.0.16248370 (r30)
+DMG size: 1072970961 bytes
+Download-page SHA-1: 48591224b6657f46eebbc9d95d4af09bbed8d107
+Measured SHA-1:      48591224b6657f46eebbc9d95d4af09bbed8d107
+SHA check: PASS

frame/openxr-compat/evidence/ctest.txt

@@ -0,0 +1,9 @@
+Test project /Users/saphid/projects/steam-frame-xrlayer/frame/openxr-compat/build-host
+    Start 1: compat_logic
+1/2 Test #1: compat_logic .....................   Passed    0.01 sec
+    Start 2: layer_dispatch
+2/2 Test #2: layer_dispatch ...................   Passed    0.42 sec
+
+100% tests passed out of 2
+
+Total Test time (real) =   0.43 sec

frame/openxr-compat/evidence/readelf.txt

@@ -0,0 +1,110 @@
+
+Elf file type is DYN (Shared object file)
+Entry point 0x0
+There are 9 program headers, starting at offset 64
+
+Program Headers:
+  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
+  PHDR           0x000040 0x0000000000000040 0x0000000000000040 0x0001f8 0x0001f8 R   0x8
+  LOAD           0x000000 0x0000000000000000 0x0000000000000000 0x0169e0 0x0169e0 R E 0x4000
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+  LOAD           0x017470 0x000000000001f470 0x000000000001f470 0x000068 0x000bc0 RW  0x4000
+  DYNAMIC        0x017048 0x000000000001b048 0x000000000001b048 0x0001c0 0x0001c0 RW  0x8
+  GNU_RELRO      0x0169e0 0x000000000001a9e0 0x000000000001a9e0 0x000a90 0x001620 R   0x1
+  GNU_EH_FRAME   0x004fb4 0x0000000000004fb4 0x0000000000004fb4 0x00070c 0x00070c R   0x4
+  GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0x0
+  NOTE           0x000238 0x0000000000000238 0x0000000000000238 0x0000bc 0x0000bc R   0x4
+
+ Section to Segment mapping:
+  Segment Sections...
+   00
+   01     .note.android.ident .note.gnu.build-id .dynsym .gnu.version .gnu.version_r .gnu.hash .dynstr .rela.dyn .rela.plt .gcc_except_table .rodata .eh_frame_hdr .eh_frame .text __lcxx_override .plt
+   02     .data.rel.ro .fini_array .init_array .dynamic .got .got.plt .relro_padding
+   03     .data .bss
+   04     .dynamic
+   05     .data.rel.ro .fini_array .init_array .dynamic .got .got.plt .relro_padding
+   06     .eh_frame_hdr
+   07
+   08     .note.android.ident .note.gnu.build-id
+   None   .comment .shstrtab
+Dynamic section at offset 0x17048 contains 28 entries:
+  Tag                Type           Name/Value
+  0x0000000000000001 (NEEDED)       Shared library: [liblog.so]
+  0x0000000000000001 (NEEDED)       Shared library: [libm.so]
+  0x0000000000000001 (NEEDED)       Shared library: [libdl.so]
+  0x0000000000000001 (NEEDED)       Shared library: [libc.so]
+  0x000000000000000e (SONAME)       Library soname: [libXrApiLayer_FRAME_compat.so]
+  0x000000000000001e (FLAGS)        BIND_NOW
+  0x000000006ffffffb (FLAGS_1)      NOW
+  0x0000000000000007 (RELA)         0xae8
+  0x0000000000000008 (RELASZ)       5424 (bytes)
+  0x0000000000000009 (RELAENT)      24 (bytes)
+  0x000000006ffffff9 (RELACOUNT)    225
+  0x0000000000000017 (JMPREL)       0x2018
+  0x0000000000000002 (PLTRELSZ)     1080 (bytes)
+  0x0000000000000003 (PLTGOT)       0x1b2f0
+  0x0000000000000014 (PLTREL)       RELA
+  0x0000000000000006 (SYMTAB)       0x2f8
+  0x000000000000000b (SYMENT)       24 (bytes)
+  0x0000000000000005 (STRTAB)       0x838
+  0x000000000000000a (STRSZ)        681 (bytes)
+  0x000000006ffffef5 (GNU_HASH)     0x818
+  0x0000000000000019 (INIT_ARRAY)   0x1b030
+  0x000000000000001b (INIT_ARRAYSZ) 24 (bytes)
+  0x000000000000001a (FINI_ARRAY)   0x1b020
+  0x000000000000001c (FINI_ARRAYSZ) 16 (bytes)
+  0x000000006ffffff0 (VERSYM)       0x778
+  0x000000006ffffffe (VERNEED)      0x7d8
+  0x000000006fffffff (VERNEEDNUM)   2
+  0x0000000000000000 (NULL)         0x0
+
+Symbol table '.dynsym' contains 48 entries:
+   Num:    Value          Size Type    Bind   Vis       Ndx Name
+     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND
+     1: 0000000000000000     0 FUNC    GLOBAL DEFAULT   UND __cxa_finalize@LIBC
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+    47: 00000000000081a0   284 FUNC    GLOBAL DEFAULT    14 xrNegotiateLoaderApiLayerInterface

frame/openxr-compat/layer.cpp

@@ -0,0 +1,289 @@
+#include "compat_logic.h"
+#include <loader_interfaces.h>
+#include <jni.h>
+#include <openxr/openxr_platform.h>
+#include <android/log.h>
+#include <cstring>
+#include <memory>
+#include <mutex>
+#include <unordered_map>
+
+#define LOG(...) __android_log_print(ANDROID_LOG_INFO, "FrameXrCompat", __VA_ARGS__)
+#define GUARD_END catch (const std::bad_alloc&) { return XR_ERROR_OUT_OF_MEMORY; } catch (...) { return XR_ERROR_RUNTIME_FAILURE; }
+namespace {
+struct Dispatch {
+    PFN_xrGetInstanceProcAddr gipa{};
+    PFN_xrDestroyInstance destroy{};
+    PFN_xrCreateSession createSession{};
+    PFN_xrDestroySession destroySession{};
+    PFN_xrLocateSpacesKHR locate{};
+    PFN_xrStringToPath stringToPath{};
+    PFN_xrPathToString pathToString{};
+    PFN_xrSuggestInteractionProfileBindings suggest{};
+    PFN_xrSetAndroidApplicationThreadKHR thread{};
+    PFN_xrRequestDisplayRefreshRateFB refresh{};
+    frame::Names enabled, stubbed;
+    XrInstance instance{};
+    bool promote{}, palm{};
+};
+std::mutex mutex;
+std::unordered_map<XrInstance, std::shared_ptr<Dispatch>> instances;
+std::unordered_map<XrSession, std::shared_ptr<Dispatch>> sessions;
+// No runtime library is opened here: every call goes through the next layer.
+PFN_xrEnumerateInstanceExtensionProperties enumerateNext{};
+template<class T> T proc(PFN_xrGetInstanceProcAddr gipa, XrInstance i, const char* name) {
+    PFN_xrVoidFunction f{};
+    if (XR_FAILED(gipa(i, name, &f))) return nullptr;
+    return reinterpret_cast<T>(f);
+}
+std::shared_ptr<Dispatch> get(XrInstance i) {
+    std::lock_guard<std::mutex> lock(mutex);
+    auto it = instances.find(i); return it == instances.end() ? nullptr : it->second;
+}
+std::shared_ptr<Dispatch> get(XrSession s) {
+    std::lock_guard<std::mutex> lock(mutex);
+    auto it = sessions.find(s); return it == sessions.end() ? nullptr : it->second;
+}
+XrResult properties(PFN_xrEnumerateInstanceExtensionProperties fn,
+                    std::vector<XrExtensionProperties>& out) {
+    if (!fn) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    for (int attempt = 0; attempt < 4; ++attempt) {
+        uint32_t n{};
+        auto r = fn(nullptr, 0, &n, nullptr);
+        if (XR_FAILED(r)) return r;
+        out.assign(n, {XR_TYPE_EXTENSION_PROPERTIES, nullptr, {}, 0});
+        if (!n) return XR_SUCCESS;
+        r = fn(nullptr, n, &n, out.data());
+        if (r == XR_ERROR_SIZE_INSUFFICIENT) continue;
+        if (XR_FAILED(r)) return r;
+        out.resize(n); return XR_SUCCESS;
+    }
+    return XR_ERROR_RUNTIME_FAILURE;
+}
+XrResult XRAPI_CALL enumerate(const char* layer, uint32_t capacity, uint32_t* count,
+                              XrExtensionProperties* output) try {
+    if (!count || (capacity && !output)) return XR_ERROR_VALIDATION_FAILURE;
+    const bool own = layer && std::strcmp(layer, frame::layerName) == 0;
+    PFN_xrEnumerateInstanceExtensionProperties next;
+    { std::lock_guard<std::mutex> lock(mutex); next = enumerateNext; }
+    if (layer && *layer && !own) return next ? next(layer, capacity, count, output) : XR_ERROR_API_LAYER_NOT_PRESENT;
+    std::vector<XrExtensionProperties> all;
+    if (!own && next) {
+        auto r = properties(next, all); if (XR_FAILED(r)) return r;
+    }
+    for (unsigned i = 0; i < 2; ++i) {
+        bool found = false;
+        for (auto& e : all) if (!std::strcmp(e.extensionName, frame::stubs[i])) found = true;
+        if (!found) {
+            XrExtensionProperties p{XR_TYPE_EXTENSION_PROPERTIES, nullptr, {}, i == 0 ? XR_KHR_android_thread_settings_SPEC_VERSION : 1u};
+            std::strcpy(p.extensionName, frame::stubs[i]); all.push_back(p);
+        }
+    }
+    *count = static_cast<uint32_t>(all.size());
+    LOG("enumerate extensions: %u (includes stubs)", *count);
+    if (!capacity) return XR_SUCCESS;
+    if (capacity < all.size()) return XR_ERROR_SIZE_INSUFFICIENT;
+    for (size_t i = 0; i < all.size(); ++i) {
+        if (output[i].type != XR_TYPE_EXTENSION_PROPERTIES) return XR_ERROR_VALIDATION_FAILURE;
+        std::strcpy(output[i].extensionName, all[i].extensionName);
+        output[i].extensionVersion = all[i].extensionVersion;
+    }
+    return XR_SUCCESS;
+} GUARD_END
+XrResult XRAPI_CALL destroyInstance(XrInstance i) try {
+    auto d = get(i); if (!d) return XR_ERROR_HANDLE_INVALID;
+    auto r = d->destroy(i);
+    if (XR_SUCCEEDED(r)) {
+        std::lock_guard<std::mutex> lock(mutex);
+        for (auto it = sessions.begin(); it != sessions.end();) {
+            if (it->second == d) it = sessions.erase(it); else ++it;
+        }
+        instances.erase(i);
+        if (instances.empty()) enumerateNext = nullptr;
+    }
+    return r;
+} GUARD_END
+XrResult XRAPI_CALL createSession(XrInstance i, const XrSessionCreateInfo* info, XrSession* s) try {
+    auto d = get(i); if (!d) return XR_ERROR_HANDLE_INVALID;
+    auto r = d->createSession(i, info, s);
+    if (XR_SUCCEEDED(r)) {
+        try { std::lock_guard<std::mutex> lock(mutex); sessions.emplace(*s, d); }
+        catch (...) { d->destroySession(*s); *s = XR_NULL_HANDLE; throw; }
+    }
+    return r;
+} GUARD_END
+XrResult XRAPI_CALL destroySession(XrSession s) try {
+    auto d = get(s); if (!d) return XR_ERROR_HANDLE_INVALID;
+    auto r = d->destroySession(s);
+    if (XR_SUCCEEDED(r)) { std::lock_guard<std::mutex> lock(mutex); sessions.erase(s); }
+    return r;
+} GUARD_END
+XrResult XRAPI_CALL locateSpaces(XrSession s, const XrSpacesLocateInfo* in, XrSpaceLocations* out) try {
+    auto d = get(s); if (!d) return XR_ERROR_HANDLE_INVALID;
+    if (!d->locate) return XR_ERROR_FUNCTION_UNSUPPORTED;
+    static std::once_flag logged;  // called every frame
+    std::call_once(logged, [] { LOG("xrLocateSpaces -> xrLocateSpacesKHR (core/KHR type aliases)"); });
+    return frame::locate(d->locate, s, in, out);
+} GUARD_END
+XrResult XRAPI_CALL threadSettings(XrSession s, XrAndroidThreadTypeKHR type, uint32_t tid) try {
+    auto d = get(s); if (!d) return XR_ERROR_HANDLE_INVALID;
+    if (frame::has(d->stubbed, frame::stubs[0])) {
+        LOG("stub xrSetAndroidApplicationThreadKHR type=%d tid=%u -> XR_SUCCESS (no scheduling change)", type, tid);
+        return XR_SUCCESS;
+    }
+    return d->thread ? d->thread(s, type, tid) : XR_ERROR_FUNCTION_UNSUPPORTED;
+} GUARD_END
+// SteamVR offers only the current refresh rate; Quest apps ask for 72/90/120 Hz
+// and abort on the error, so keep the current rate and report success.
+XrResult XRAPI_CALL requestRefreshRate(XrSession s, float hz) try {
+    auto d = get(s); if (!d) return XR_ERROR_HANDLE_INVALID;
+    auto r = d->refresh(s, hz);
+    if (r == XR_ERROR_DISPLAY_REFRESH_RATE_UNSUPPORTED_FB) {
+        LOG("xrRequestDisplayRefreshRateFB %.1f Hz unsupported; keeping the current rate", hz);
+        return XR_SUCCESS;
+    }
+    return r;
+} GUARD_END
+XrResult XRAPI_CALL stringToPath(XrInstance i, const char* path, XrPath* out) try {
+    auto d = get(i); if (!d) return XR_ERROR_HANDLE_INVALID;
+    if (!path) return XR_ERROR_VALIDATION_FAILURE;
+    auto rewritten = frame::rewritePath(path, d->palm);
+    if (rewritten != path) LOG("path %s -> %s", path, rewritten.c_str());
+    return d->stringToPath(i, rewritten.c_str(), out);
+} GUARD_END
+XrResult pathString(const Dispatch& d, XrPath path, std::string& out) {
+    uint32_t n{};
+    auto r = d.pathToString(d.instance, path, 0, &n, nullptr);
+    if (XR_FAILED(r)) return r;
+    std::vector<char> text(n);
+    r = d.pathToString(d.instance, path, n, &n, text.data());
+    if (XR_SUCCEEDED(r)) out.assign(text.data());
+    return r;
+}
+XrResult XRAPI_CALL suggest(XrInstance i, const XrInteractionProfileSuggestedBinding* info) try {
+    auto d = get(i); if (!d) return XR_ERROR_HANDLE_INVALID;
+    if (!info || (info->countSuggestedBindings && !info->suggestedBindings)) return XR_ERROR_VALIDATION_FAILURE;
+    std::string profile;
+    auto r = pathString(*d, info->interactionProfile, profile);
+    if (XR_FAILED(r)) return r;
+    if (d->promote && frame::dropProfile(profile, d->enabled)) {
+        LOG("drop unsupported 1.1 interaction profile %s (%u suggestions)", profile.c_str(), info->countSuggestedBindings);
+        return XR_SUCCESS;
+    }
+    auto copy = *info;
+    std::vector<XrActionSuggestedBinding> bindings;
+    for (uint32_t index = 0; index < info->countSuggestedBindings; ++index) {
+        auto b = info->suggestedBindings[index];
+        std::string path;
+        r = pathString(*d, b.binding, path); if (XR_FAILED(r)) return r;
+        auto rewritten = frame::rewritePath(path, d->palm);
+        if (rewritten != path) {
+            LOG("binding %s -> %s", path.c_str(), rewritten.c_str());
+            r = d->stringToPath(i, rewritten.c_str(), &b.binding); if (XR_FAILED(r)) return r;
+        }
+        bindings.push_back(b);
+    }
+    copy.suggestedBindings = bindings.data();
+    return d->suggest(i, &copy);
+} GUARD_END
+XrResult XRAPI_CALL gipa(XrInstance, const char*, PFN_xrVoidFunction*);
+XrResult XRAPI_CALL createLayer(const XrInstanceCreateInfo* info, const XrApiLayerCreateInfo* layer,
+                               XrInstance* instance) try {
+    if (!info || !instance || !layer || layer->structType != XR_LOADER_INTERFACE_STRUCT_API_LAYER_CREATE_INFO ||
+        layer->structVersion != XR_API_LAYER_CREATE_INFO_STRUCT_VERSION || layer->structSize != sizeof(*layer) ||
+        !layer->nextInfo || layer->nextInfo->structType != XR_LOADER_INTERFACE_STRUCT_API_LAYER_NEXT_INFO ||
+        layer->nextInfo->structVersion != XR_API_LAYER_NEXT_INFO_STRUCT_VERSION ||
+        layer->nextInfo->structSize != sizeof(XrApiLayerNextInfo) ||
+        !layer->nextInfo->nextGetInstanceProcAddr || !layer->nextInfo->nextCreateApiLayerInstance ||
+        (info->enabledExtensionCount && !info->enabledExtensionNames)) return XR_ERROR_INITIALIZATION_FAILED;
+    *instance = XR_NULL_HANDLE;
+    auto next = layer->nextInfo->nextGetInstanceProcAddr;
+    auto enumFn = proc<PFN_xrEnumerateInstanceExtensionProperties>(next, XR_NULL_HANDLE, "xrEnumerateInstanceExtensionProperties");
+    std::vector<XrExtensionProperties> available;
+    auto r = properties(enumFn, available); if (XR_FAILED(r)) { LOG("runtime extension enumeration failed: %d", r); return r; }
+    frame::Names requested, supported;
+    for (auto& p : available) supported.emplace_back(p.extensionName);
+    for (uint32_t n = 0; n < info->enabledExtensionCount; ++n) {
+        if (!info->enabledExtensionNames[n]) return XR_ERROR_VALIDATION_FAILURE;
+        requested.emplace_back(info->enabledExtensionNames[n]);
+    }
+    auto d = std::make_shared<Dispatch>();
+    d->promote = frame::downgrade(info->applicationInfo.apiVersion);
+    auto plan = frame::extensions(requested, supported, d->promote);
+    for (auto& n : plan.added) LOG("enable promoted extension %s", n.c_str());
+    for (auto& n : plan.stubbed) LOG("emulate missing extension %s; remove downstream", n.c_str());
+    for (auto& n : plan.missing) LOG("unsupported extension %s retained; runtime must reject", n.c_str());
+    auto copy = *info;
+    copy.applicationInfo.apiVersion = frame::runtimeVersion(info->applicationInfo.apiVersion);
+    if (d->promote) LOG("API %u.%u.%u -> 1.0.%u", unsigned(XR_VERSION_MAJOR(info->applicationInfo.apiVersion)),
+        unsigned(XR_VERSION_MINOR(info->applicationInfo.apiVersion)), unsigned(XR_VERSION_PATCH(info->applicationInfo.apiVersion)),
+        unsigned(XR_VERSION_PATCH(copy.applicationInfo.apiVersion)));
+    std::vector<const char*> names;
+    for (auto& n : plan.downstream) names.push_back(n.c_str());
+    copy.enabledExtensionCount = static_cast<uint32_t>(names.size()); copy.enabledExtensionNames = names.data();
+    auto chain = *layer; chain.nextInfo = layer->nextInfo->next;
+    r = layer->nextInfo->nextCreateApiLayerInstance(&copy, &chain, instance);
+    if (XR_FAILED(r)) { LOG("downstream xrCreateInstance -> %d", r); return r; }
+    d->gipa = next; d->instance = *instance;
+    d->destroy = proc<PFN_xrDestroyInstance>(next, *instance, "xrDestroyInstance");
+    // A successful runtime instance must expose xrDestroyInstance.
+    if (!d->destroy) {  // nothing could ever destroy it, so don't hand it out
+        LOG("invalid downstream: missing xrDestroyInstance"); *instance = XR_NULL_HANDLE; return XR_ERROR_INITIALIZATION_FAILED;
+    }
+    try {
+        d->enabled = std::move(plan.downstream); d->stubbed = std::move(plan.stubbed);
+        d->palm = frame::has(d->enabled, "XR_EXT_palm_pose");
+#define LOAD(field, name) d->field = proc<PFN_##name>(next, *instance, #name)
+        LOAD(createSession, xrCreateSession); LOAD(destroySession, xrDestroySession);
+        LOAD(stringToPath, xrStringToPath); LOAD(pathToString, xrPathToString);
+        LOAD(suggest, xrSuggestInteractionProfileBindings);
+        if (frame::has(d->enabled, "XR_KHR_locate_spaces")) LOAD(locate, xrLocateSpacesKHR);
+        if (frame::has(d->enabled, frame::stubs[0])) LOAD(thread, xrSetAndroidApplicationThreadKHR);
+        if (frame::has(d->enabled, "XR_FB_display_refresh_rate")) LOAD(refresh, xrRequestDisplayRefreshRateFB);
+#undef LOAD
+        if (!d->createSession || !d->destroySession || !d->stringToPath || !d->pathToString || !d->suggest) {
+            d->destroy(*instance); *instance = XR_NULL_HANDLE; return XR_ERROR_INITIALIZATION_FAILED;
+        }
+        std::lock_guard<std::mutex> lock(mutex);
+        instances.emplace(*instance, d); enumerateNext = enumFn;
+    } catch (...) { d->destroy(*instance); *instance = XR_NULL_HANDLE; throw; }
+    LOG("created instance; next-layer dispatch retained (Valve layer coexists)");
+    return r;
+} GUARD_END
+XrResult XRAPI_CALL gipa(XrInstance i, const char* name, PFN_xrVoidFunction* out) try {
+    if (!name || !out) return XR_ERROR_VALIDATION_FAILURE;
+    *out = nullptr;
+#define RETURN_PROC(n, fn) if (!std::strcmp(name, n)) { *out = reinterpret_cast<PFN_xrVoidFunction>(fn); return XR_SUCCESS; }
+    RETURN_PROC("xrGetInstanceProcAddr", gipa)
+    RETURN_PROC("xrCreateApiLayerInstance", createLayer)
+    RETURN_PROC("xrEnumerateInstanceExtensionProperties", enumerate)
+    auto d = get(i); if (!d) return XR_ERROR_HANDLE_INVALID;
+    RETURN_PROC("xrDestroyInstance", destroyInstance)
+    RETURN_PROC("xrCreateSession", createSession)
+    RETURN_PROC("xrDestroySession", destroySession)
+    RETURN_PROC("xrStringToPath", stringToPath)
+    RETURN_PROC("xrSuggestInteractionProfileBindings", suggest)
+    if (d->locate && d->promote) { RETURN_PROC("xrLocateSpaces", locateSpaces) }
+    if (frame::has(d->stubbed, frame::stubs[0])) { RETURN_PROC("xrSetAndroidApplicationThreadKHR", threadSettings) }
+    if (d->refresh) { RETURN_PROC("xrRequestDisplayRefreshRateFB", requestRefreshRate) }
+#undef RETURN_PROC
+    // Includes xrGetInstanceProperties: report the actual runtime's identity.
+    return d->gipa(i, name, out);
+} GUARD_END
+} // namespace
+extern "C" __attribute__((visibility("default"))) XrResult XRAPI_CALL xrNegotiateLoaderApiLayerInterface(
+    const XrNegotiateLoaderInfo* loader, const char* name, XrNegotiateApiLayerRequest* request) {
+    if (!loader || !name || !request || std::strcmp(name, frame::layerName) ||
+        loader->structType != XR_LOADER_INTERFACE_STRUCT_LOADER_INFO ||
+        loader->structVersion != XR_LOADER_INFO_STRUCT_VERSION || loader->structSize != sizeof(*loader) ||
+        request->structType != XR_LOADER_INTERFACE_STRUCT_API_LAYER_REQUEST ||
+        request->structVersion != XR_API_LAYER_INFO_STRUCT_VERSION || request->structSize != sizeof(*request) ||
+        loader->minInterfaceVersion > 1 || loader->maxInterfaceVersion < 1 ||
+        loader->minApiVersion > XR_CURRENT_API_VERSION || loader->maxApiVersion < XR_MAKE_VERSION(1, 1, 0))
+        return XR_ERROR_INITIALIZATION_FAILED;
+    request->layerInterfaceVersion = 1;
+    request->layerApiVersion = std::min<XrVersion>(XR_CURRENT_API_VERSION, loader->maxApiVersion);
+    request->getInstanceProcAddr = gipa; request->createApiLayerInstance = createLayer;
+    LOG("negotiated interface 1, API 1.1");
+    return XR_SUCCESS;
+}

frame/openxr-compat/tests/compat_tests.cpp

@@ -0,0 +1,70 @@
+#include "compat_logic.h"
+#include <cstdlib>
+#include <iostream>
+#include <type_traits>
+#define CHECK(expr) do { if (!(expr)) { std::cerr << __LINE__ << ": " #expr "\n"; std::exit(1); } } while (false)
+namespace {
+void* sentinel = reinterpret_cast<void*>(0x1234);
+XrResult XRAPI_CALL fakeLocate(XrSession, const XrSpacesLocateInfo* in, XrSpaceLocations* out) {
+    CHECK(in->type == XR_TYPE_SPACES_LOCATE_INFO_KHR);
+    CHECK(out->type == XR_TYPE_SPACE_LOCATIONS_KHR);
+    CHECK(in->next == sentinel);
+    auto* velocities = static_cast<XrSpaceVelocitiesKHR*>(out->next);
+    CHECK(velocities->type == XR_TYPE_SPACE_VELOCITIES_KHR);
+    CHECK(velocities->next == sentinel);
+    CHECK(in->spaceCount == 1 && in->time == 123);
+    out->locations[0].pose.position.x = 42;
+    velocities->velocities[0].linearVelocity.y = 7;
+    return XR_SUCCESS;
+}
+}
+int main() {
+    using namespace frame;
+    CHECK(!downgrade(XR_MAKE_VERSION(1, 0, 99)));
+    CHECK(runtimeVersion(XR_MAKE_VERSION(1, 0, 42)) == XR_MAKE_VERSION(1, 0, 42));
+    CHECK(runtimeVersion(XR_MAKE_VERSION(1, 1, 0)) == XR_API_VERSION_1_0);
+    CHECK(runtimeVersion(XR_MAKE_VERSION(1, 1, 999)) == XR_API_VERSION_1_0);
+    CHECK(runtimeVersion(XR_MAKE_VERSION(2, 0, 0)) == XR_API_VERSION_1_0);
+    Names available{"XR_KHR_locate_spaces", "XR_EXT_palm_pose", "XR_EXT_hand_interaction", "XR_VARJO_quad_views"};
+    Names requested{stubs[0], stubs[1], "XR_MISSING_test", "XR_EXT_palm_pose"};
+    auto p = extensions(requested, available, true);
+    CHECK(p.stubbed.size() == 2 && p.missing == Names{"XR_MISSING_test"});
+    CHECK(has(p.downstream, "XR_MISSING_test"));
+    CHECK(has(p.downstream, "XR_KHR_locate_spaces") && has(p.downstream, "XR_VARJO_quad_views"));
+    CHECK(!has(p.downstream, "XR_EXT_hand_interaction"));
+    CHECK(!has(p.downstream, "XR_EXT_local_floor"));
+    CHECK(std::count(p.downstream.begin(), p.downstream.end(), "XR_EXT_palm_pose") == 1);
+    available.push_back(stubs[0]);
+    CHECK(extensions(requested, available, true).stubbed == Names{stubs[1]});
+    CHECK(extensions({}, available, false).downstream.empty());
+    CHECK(rewritePath("/user/hand/left/input/grip_surface/pose", true) == "/user/hand/left/input/palm_ext/pose");
+    CHECK(rewritePath("/user/hand/right/input/grip_surface/pose", true) == "/user/hand/right/input/palm_ext/pose");
+    CHECK(rewritePath("/user/hand/left/input/grip_surface/pose", false) == "/user/hand/left/input/grip_surface/pose");
+    CHECK(rewritePath("/user/hand/left/input/grip_surface/pose/extra", true) == "/user/hand/left/input/grip_surface/pose/extra");
+    CHECK(rewritePath("/user/hand/left/input/grip/pose", true) == "/user/hand/left/input/grip/pose");
+    CHECK(dropProfile("/interaction_profiles/meta/touch_pro_controller", {}));
+    CHECK(dropProfile("/interaction_profiles/meta/touch_controller_quest_2", {}));
+    CHECK(dropProfile("/interaction_profiles/hp/mixed_reality_controller", {}));
+    CHECK(!dropProfile("/interaction_profiles/hp/mixed_reality_controller", {"XR_EXT_hp_mixed_reality_controller"}));
+    CHECK(!dropProfile("/interaction_profiles/oculus/touch_controller", {}));
+    CHECK(!dropProfile("/interaction_profiles/khr/simple_controller", {}));
+    CHECK(!dropProfile("/interaction_profiles/valve/frame_controller", {}));
+    CHECK(!dropProfile("/interaction_profiles/ext/hand_interaction_ext", {}));
+    CHECK(extensionType(XR_TYPE_SPACES_LOCATE_INFO) == XR_TYPE_SPACES_LOCATE_INFO_KHR);
+    CHECK(extensionType(XR_TYPE_SPACE_LOCATIONS) == XR_TYPE_SPACE_LOCATIONS_KHR);
+    CHECK(extensionType(XR_TYPE_SPACE_VELOCITIES) == XR_TYPE_SPACE_VELOCITIES_KHR);
+    CHECK(extensionType(XR_TYPE_INSTANCE_CREATE_INFO) == XR_TYPE_INSTANCE_CREATE_INFO);
+    static_assert(std::is_same_v<XrSpaceVelocities, XrSpaceVelocitiesKHR>);
+    XrSpace space{};
+    XrSpaceLocationData data{};
+    XrSpaceVelocityData velocity{};
+    XrSpaceVelocities velocities{XR_TYPE_SPACE_VELOCITIES, sentinel, 1, &velocity};
+    XrSpaceLocations locations{XR_TYPE_SPACE_LOCATIONS, &velocities, 1, &data};
+    XrSpacesLocateInfo info{XR_TYPE_SPACES_LOCATE_INFO, sentinel, XR_NULL_HANDLE, 123, 1, &space};
+    CHECK(locate(fakeLocate, XR_NULL_HANDLE, &info, &locations) == XR_SUCCESS);
+    CHECK(data.pose.position.x == 42 && velocity.linearVelocity.y == 7);
+    CHECK(info.next == sentinel && locations.next == &velocities && velocities.next == sentinel);
+    CHECK(info.type == XR_TYPE_SPACES_LOCATE_INFO && locations.type == XR_TYPE_SPACE_LOCATIONS && velocities.type == XR_TYPE_SPACE_VELOCITIES);
+    CHECK(locate(fakeLocate, XR_NULL_HANDLE, nullptr, &locations) == XR_ERROR_VALIDATION_FAILURE);
+    std::cout << "All version, extension, path/profile and locate-chain checks passed\n";
+}

frame/openxr-compat/tests/dispatch_tests.cpp

@@ -0,0 +1,134 @@
+// Compile the actual layer with host-only JNI/logging shims, and a fake next
+// layer. This exercises ABI routing without a runtime or a headset.
+#include "../layer.cpp"
+#include <cstdlib>
+#include <iostream>
+#define CHECK(expr) do { if (!(expr)) { std::cerr << __LINE__ << ": " #expr "\n"; std::exit(1); } } while (false)
+namespace {
+uintptr_t serial = 100;
+frame::Names seenExtensions;
+XrVersion seenVersion{};
+XrApiLayerNextInfo* seenNext{};
+int suggestionCalls{}, locateCalls{}, realThreadCalls{};
+bool nativeThread{};
+std::unordered_map<XrPath, std::string> paths;
+XrResult XRAPI_CALL fakeEnumerate(const char*, uint32_t capacity, uint32_t* count, XrExtensionProperties* out) {
+    const char* extensions[] = {"XR_KHR_locate_spaces", "XR_EXT_palm_pose", frame::stubs[0]};
+    *count = nativeThread ? 3 : 2;
+    if (!capacity) return XR_SUCCESS;
+    if (capacity < *count) return XR_ERROR_SIZE_INSUFFICIENT;
+    for (uint32_t j = 0; j < *count; ++j) { std::strcpy(out[j].extensionName, extensions[j]); out[j].extensionVersion = 1; }
+    return XR_SUCCESS;
+}
+XrResult XRAPI_CALL fakeCreate(const XrInstanceCreateInfo* in, const XrApiLayerCreateInfo* layer, XrInstance* i) {
+    seenVersion = in->applicationInfo.apiVersion; seenNext = layer->nextInfo;
+    seenExtensions.clear();
+    for (uint32_t j = 0; j < in->enabledExtensionCount; ++j) seenExtensions.emplace_back(in->enabledExtensionNames[j]);
+    if (frame::has(seenExtensions, "XR_MISSING_test")) return XR_ERROR_EXTENSION_NOT_PRESENT;
+    *i = reinterpret_cast<XrInstance>(++serial); return XR_SUCCESS;
+}
+XrResult XRAPI_CALL fakeDestroy(XrInstance) { return XR_SUCCESS; }
+XrResult XRAPI_CALL fakeCreateSession(XrInstance, const XrSessionCreateInfo*, XrSession* s) {
+    *s = reinterpret_cast<XrSession>(++serial); return XR_SUCCESS;
+}
+XrResult XRAPI_CALL fakeDestroySession(XrSession) { return XR_SUCCESS; }
+XrResult XRAPI_CALL fakeString(XrInstance, const char* text, XrPath* p) {
+    *p = ++serial; paths[*p] = text; return XR_SUCCESS;
+}
+XrResult XRAPI_CALL fakePath(XrInstance, XrPath p, uint32_t cap, uint32_t* count, char* out) {
+    if (!paths.count(p)) return XR_ERROR_PATH_INVALID;
+    *count = static_cast<uint32_t>(paths[p].size() + 1);
+    if (!cap) return XR_SUCCESS;
+    if (cap < *count) return XR_ERROR_SIZE_INSUFFICIENT;
+    std::strcpy(out, paths[p].c_str()); return XR_SUCCESS;
+}
+XrResult XRAPI_CALL fakeSuggest(XrInstance, const XrInteractionProfileSuggestedBinding* info) {
+    ++suggestionCalls;
+    if (info->countSuggestedBindings) CHECK(paths[info->suggestedBindings[0].binding] == "/user/hand/left/input/palm_ext/pose");
+    return XR_SUCCESS;
+}
+XrResult XRAPI_CALL fakeLocate(XrSession, const XrSpacesLocateInfo*, XrSpaceLocations*) { ++locateCalls; return XR_SUCCESS; }
+XrResult XRAPI_CALL fakeThread(XrSession, XrAndroidThreadTypeKHR, uint32_t) { ++realThreadCalls; return XR_TIMEOUT_EXPIRED; }
+XrResult XRAPI_CALL fakeProperties(XrInstance, XrInstanceProperties*) { return XR_SUCCESS; }
+XrResult XRAPI_CALL fakeGipa(XrInstance, const char* n, PFN_xrVoidFunction* out) {
+#define MAP(name, f) if (!std::strcmp(n, name)) { *out = reinterpret_cast<PFN_xrVoidFunction>(f); return XR_SUCCESS; }
+    MAP("xrEnumerateInstanceExtensionProperties", fakeEnumerate)
+    MAP("xrDestroyInstance", fakeDestroy)
+    MAP("xrCreateSession", fakeCreateSession) MAP("xrDestroySession", fakeDestroySession)
+    MAP("xrStringToPath", fakeString) MAP("xrPathToString", fakePath)
+    MAP("xrSuggestInteractionProfileBindings", fakeSuggest) MAP("xrLocateSpacesKHR", fakeLocate)
+    MAP("xrSetAndroidApplicationThreadKHR", fakeThread) MAP("xrGetInstanceProperties", fakeProperties)
+#undef MAP
+    *out = nullptr; return XR_ERROR_FUNCTION_UNSUPPORTED;
+}
+}
+int main() {
+    XrNegotiateLoaderInfo loader{XR_LOADER_INTERFACE_STRUCT_LOADER_INFO, 1, sizeof(XrNegotiateLoaderInfo), 1, 1,
+                                XR_MAKE_VERSION(1,0,0), XR_MAKE_VERSION(1,1023,4095)};
+    XrNegotiateApiLayerRequest request{};
+    request.structType = XR_LOADER_INTERFACE_STRUCT_API_LAYER_REQUEST; request.structVersion = 1; request.structSize = sizeof(request);
+    CHECK(xrNegotiateLoaderApiLayerInterface(&loader, frame::layerName, &request) == XR_SUCCESS);
+    CHECK(request.getInstanceProcAddr && request.createApiLayerInstance);
+    loader.maxApiVersion = XR_MAKE_VERSION(1,1,0);
+    CHECK(xrNegotiateLoaderApiLayerInterface(&loader, frame::layerName, &request) == XR_SUCCESS);
+    CHECK(request.layerApiVersion == loader.maxApiVersion);
+    loader.maxApiVersion = XR_MAKE_VERSION(1,0,99);
+    CHECK(xrNegotiateLoaderApiLayerInterface(&loader, frame::layerName, &request) == XR_ERROR_INITIALIZATION_FAILED);
+    loader.maxApiVersion = XR_MAKE_VERSION(1,1023,4095);
+    CHECK(xrNegotiateLoaderApiLayerInterface(&loader, "wrong", &request) == XR_ERROR_INITIALIZATION_FAILED);
+    XrApiLayerNextInfo tail{};
+    XrApiLayerNextInfo next{XR_LOADER_INTERFACE_STRUCT_API_LAYER_NEXT_INFO, 1, sizeof(XrApiLayerNextInfo), {}, fakeGipa, fakeCreate, &tail};
+    XrApiLayerCreateInfo layer{XR_LOADER_INTERFACE_STRUCT_API_LAYER_CREATE_INFO, 1, sizeof(XrApiLayerCreateInfo), nullptr, {}, &next};
+    XrInstanceCreateInfo info{XR_TYPE_INSTANCE_CREATE_INFO, nullptr, 0, {}, 0, nullptr, 2, frame::stubs};
+    info.applicationInfo.apiVersion = XR_MAKE_VERSION(1,1,999);
+    XrInstance a{}, b{};
+    CHECK(createLayer(&info, &layer, &a) == XR_SUCCESS);
+    CHECK(seenVersion == XR_API_VERSION_1_0 && info.applicationInfo.apiVersion == XR_MAKE_VERSION(1,1,999));
+    CHECK(seenNext == &tail && layer.nextInfo == &next);
+    CHECK(!frame::has(seenExtensions, frame::stubs[0]) && frame::has(seenExtensions, "XR_KHR_locate_spaces"));
+    XrSession sa{}, sb{};
+    CHECK(createSession(a, nullptr, &sa) == XR_SUCCESS);
+    CHECK(threadSettings(sa, XR_ANDROID_THREAD_TYPE_APPLICATION_MAIN_KHR, 1) == XR_SUCCESS);
+    nativeThread = true;
+    CHECK(createLayer(&info, &layer, &b) == XR_SUCCESS);
+    CHECK(frame::has(seenExtensions, frame::stubs[0]));
+    CHECK(createSession(b, nullptr, &sb) == XR_SUCCESS);
+    PFN_xrVoidFunction fn{};
+    CHECK(gipa(b, "xrSetAndroidApplicationThreadKHR", &fn) == XR_SUCCESS);
+    CHECK(reinterpret_cast<PFN_xrSetAndroidApplicationThreadKHR>(fn)(sb, XR_ANDROID_THREAD_TYPE_APPLICATION_MAIN_KHR, 1) == XR_TIMEOUT_EXPIRED);
+    CHECK(realThreadCalls == 1);
+    CHECK(threadSettings(sa, XR_ANDROID_THREAD_TYPE_APPLICATION_MAIN_KHR, 1) == XR_SUCCESS);
+    CHECK(gipa(a, "xrGetInstanceProperties", &fn) == XR_SUCCESS && fn == reinterpret_cast<PFN_xrVoidFunction>(fakeProperties));
+    CHECK(gipa(a, "xrLocateSpaces", &fn) == XR_SUCCESS);
+    XrSpacesLocateInfo locateInfo{XR_TYPE_SPACES_LOCATE_INFO, nullptr, XR_NULL_HANDLE, 1, 0, nullptr};
+    XrSpaceLocations locations{XR_TYPE_SPACE_LOCATIONS, nullptr, 0, nullptr};
+    CHECK(reinterpret_cast<PFN_xrLocateSpaces>(fn)(sa, &locateInfo, &locations) == XR_SUCCESS && locateCalls == 1);
+    XrPath binding{}, profile{};
+    CHECK(stringToPath(a, "/user/hand/left/input/grip_surface/pose", &binding) == XR_SUCCESS);
+    CHECK(paths[binding] == "/user/hand/left/input/palm_ext/pose");
+    fakeString(a, "/user/hand/left/input/grip_surface/pose", &binding); // preexisting path: rewrite in suggest too
+    fakeString(a, "/interaction_profiles/oculus/touch_controller", &profile);
+    XrActionSuggestedBinding action{XR_NULL_HANDLE, binding};
+    XrInteractionProfileSuggestedBinding suggested{XR_TYPE_INTERACTION_PROFILE_SUGGESTED_BINDING, nullptr, profile, 1, &action};
+    CHECK(suggest(a, &suggested) == XR_SUCCESS && suggestionCalls == 1);
+    CHECK(paths[action.binding] == "/user/hand/left/input/grip_surface/pose");
+    fakeString(a, "/interaction_profiles/meta/touch_pro_controller", &suggested.interactionProfile);
+    CHECK(suggest(a, &suggested) == XR_SUCCESS && suggestionCalls == 1);
+    uint32_t count{};
+    CHECK(enumerate(frame::layerName, 0, &count, nullptr) == XR_SUCCESS && count == 2);
+    XrExtensionProperties props[2]{{XR_TYPE_EXTENSION_PROPERTIES, nullptr, {}, 0}, {XR_TYPE_EXTENSION_PROPERTIES, nullptr, {}, 0}};
+    CHECK(enumerate(frame::layerName, 1, &count, props) == XR_ERROR_SIZE_INSUFFICIENT);
+    CHECK(enumerate(frame::layerName, 2, &count, props) == XR_SUCCESS && count == 2);
+    CHECK(enumerate(nullptr, 0, &count, nullptr) == XR_SUCCESS && count == 4);
+    const char* missing = "XR_MISSING_test";
+    info.enabledExtensionCount = 1; info.enabledExtensionNames = &missing;
+    XrInstance failed{};
+    CHECK(createLayer(&info, &layer, &failed) == XR_ERROR_EXTENSION_NOT_PRESENT && failed == XR_NULL_HANDLE);
+    CHECK(destroySession(sa) == XR_SUCCESS);
+    CHECK(threadSettings(sa, XR_ANDROID_THREAD_TYPE_APPLICATION_MAIN_KHR, 1) == XR_ERROR_HANDLE_INVALID);
+    CHECK(destroyInstance(a) == XR_SUCCESS);
+    CHECK(get(sb) && !get(a));
+    CHECK(destroyInstance(b) == XR_SUCCESS && !get(sb));
+    CHECK(instances.empty() && sessions.empty() && enumerateNext == nullptr);
+    std::cout << "Negotiation, next-layer chaining, multi-instance dispatch, stubs, forwarding and cleanup passed\n";
+}

frame/openxr-compat/tests/shims/android/log.h

@@ -0,0 +1,9 @@
+#pragma once
+// Host-only logcat replacement. Android builds use the NDK header and liblog.
+#include <cstdarg>
+#include <cstdio>
+#define ANDROID_LOG_INFO 4
+inline int __android_log_print(int, const char*, const char* fmt, ...) {
+    va_list args; va_start(args, fmt); auto r = std::vfprintf(stderr, fmt, args);
+    va_end(args); std::fputc('\n', stderr); return r;
+}

frame/openxr-compat/tests/shims/jni.h

@@ -0,0 +1,3 @@
+#pragma once
+// Only the opaque jobject declaration is needed by openxr_platform.h.
+typedef void* jobject;

frame/openxr-compat/vendor/LICENSE

@@ -0,0 +1,208 @@
+Apache License
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frame/openxr-compat/vendor/loader_interfaces.h

@@ -0,0 +1,114 @@
+// Copyright (c) 2017-2023, The Khronos Group Inc.
+// Copyright (c) 2017 Valve Corporation
+// Copyright (c) 2017 LunarG, Inc.
+//
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+//
+// Initial Author: Mark Young <marky@lunarg.com>
+//
+
+#pragma once
+
+#include <openxr/openxr.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Forward declare.
+typedef struct XrApiLayerCreateInfo XrApiLayerCreateInfo;
+
+// Function pointer prototype for the xrCreateApiLayerInstance function used in place of xrCreateInstance.
+// This function allows us to pass special API layer information to each layer during the process of creating an Instance.
+typedef XrResult(XRAPI_PTR *PFN_xrCreateApiLayerInstance)(const XrInstanceCreateInfo *info,
+                                                          const XrApiLayerCreateInfo *apiLayerInfo, XrInstance *instance);
+
+// Loader/API Layer Interface versions
+//  1 - First version, introduces negotiation structure and functions
+#define XR_CURRENT_LOADER_API_LAYER_VERSION 1
+
+// Loader/Runtime Interface versions
+//  1 - First version, introduces negotiation structure and functions
+#define XR_CURRENT_LOADER_RUNTIME_VERSION 1
+
+// Version negotiation values
+typedef enum XrLoaderInterfaceStructs {
+    XR_LOADER_INTERFACE_STRUCT_UNINTIALIZED = 0,
+    XR_LOADER_INTERFACE_STRUCT_LOADER_INFO,
+    XR_LOADER_INTERFACE_STRUCT_API_LAYER_REQUEST,
+    XR_LOADER_INTERFACE_STRUCT_RUNTIME_REQUEST,
+    XR_LOADER_INTERFACE_STRUCT_API_LAYER_CREATE_INFO,
+    XR_LOADER_INTERFACE_STRUCT_API_LAYER_NEXT_INFO,
+} XrLoaderInterfaceStructs;
+
+#define XR_LOADER_INFO_STRUCT_VERSION 1
+typedef struct XrNegotiateLoaderInfo {
+    XrLoaderInterfaceStructs structType;  // XR_LOADER_INTERFACE_STRUCT_LOADER_INFO
+    uint32_t structVersion;               // XR_LOADER_INFO_STRUCT_VERSION
+    size_t structSize;                    // sizeof(XrNegotiateLoaderInfo)
+    uint32_t minInterfaceVersion;
+    uint32_t maxInterfaceVersion;
+    XrVersion minApiVersion;
+    XrVersion maxApiVersion;
+} XrNegotiateLoaderInfo;
+
+#define XR_API_LAYER_INFO_STRUCT_VERSION 1
+typedef struct XrNegotiateApiLayerRequest {
+    XrLoaderInterfaceStructs structType;  // XR_LOADER_INTERFACE_STRUCT_API_LAYER_REQUEST
+    uint32_t structVersion;               // XR_API_LAYER_INFO_STRUCT_VERSION
+    size_t structSize;                    // sizeof(XrNegotiateApiLayerRequest)
+    uint32_t layerInterfaceVersion;       // CURRENT_LOADER_API_LAYER_VERSION
+    XrVersion layerApiVersion;
+    PFN_xrGetInstanceProcAddr getInstanceProcAddr;
+    PFN_xrCreateApiLayerInstance createApiLayerInstance;
+} XrNegotiateApiLayerRequest;
+
+#define XR_RUNTIME_INFO_STRUCT_VERSION 1
+typedef struct XrNegotiateRuntimeRequest {
+    XrLoaderInterfaceStructs structType;  // XR_LOADER_INTERFACE_STRUCT_RUNTIME_REQUEST
+    uint32_t structVersion;               // XR_RUNTIME_INFO_STRUCT_VERSION
+    size_t structSize;                    // sizeof(XrNegotiateRuntimeRequest)
+    uint32_t runtimeInterfaceVersion;     // CURRENT_LOADER_RUNTIME_VERSION
+    XrVersion runtimeApiVersion;
+    PFN_xrGetInstanceProcAddr getInstanceProcAddr;
+} XrNegotiateRuntimeRequest;
+
+// Function used to negotiate an interface betewen the loader and an API layer.  Each library exposing one or
+// more API layers needs to expose at least this function.
+typedef XrResult(XRAPI_PTR *PFN_xrNegotiateLoaderApiLayerInterface)(const XrNegotiateLoaderInfo *loaderInfo,
+                                                                    const char *apiLayerName,
+                                                                    XrNegotiateApiLayerRequest *apiLayerRequest);
+
+// Function used to negotiate an interface betewen the loader and a runtime.  Each runtime should expose
+// at least this function.
+typedef XrResult(XRAPI_PTR *PFN_xrNegotiateLoaderRuntimeInterface)(const XrNegotiateLoaderInfo *loaderInfo,
+                                                                   XrNegotiateRuntimeRequest *runtimeRequest);
+
+// Forward declare.
+typedef struct XrApiLayerNextInfo XrApiLayerNextInfo;
+
+#define XR_API_LAYER_NEXT_INFO_STRUCT_VERSION 1
+struct XrApiLayerNextInfo {
+    XrLoaderInterfaceStructs structType;                      // XR_LOADER_INTERFACE_STRUCT_API_LAYER_NEXT_INFO
+    uint32_t structVersion;                                   // XR_API_LAYER_NEXT_INFO_STRUCT_VERSION
+    size_t structSize;                                        // sizeof(XrApiLayerNextInfo)
+    char layerName[XR_MAX_API_LAYER_NAME_SIZE];               // Name of API layer which should receive this info
+    PFN_xrGetInstanceProcAddr nextGetInstanceProcAddr;        // Pointer to next API layer's xrGetInstanceProcAddr
+    PFN_xrCreateApiLayerInstance nextCreateApiLayerInstance;  // Pointer to next API layer's xrCreateApiLayerInstance
+    XrApiLayerNextInfo *next;                                 // Pointer to the next API layer info in the sequence
+};
+
+#define XR_API_LAYER_MAX_SETTINGS_PATH_SIZE 512
+#define XR_API_LAYER_CREATE_INFO_STRUCT_VERSION 1
+typedef struct XrApiLayerCreateInfo {
+    XrLoaderInterfaceStructs structType;                               // XR_LOADER_INTERFACE_STRUCT_API_LAYER_CREATE_INFO
+    uint32_t structVersion;                                            // XR_API_LAYER_CREATE_INFO_STRUCT_VERSION
+    size_t structSize;                                                 // sizeof(XrApiLayerCreateInfo)
+    void *loaderInstance;                                              // Pointer to the LoaderInstance class
+    char settings_file_location[XR_API_LAYER_MAX_SETTINGS_PATH_SIZE];  // Location to the found settings file (or empty '\0')
+    XrApiLayerNextInfo *nextInfo;                                      // Pointer to the next API layer's Info
+} XrApiLayerCreateInfo;
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif

frame/openxr-compat/vendor/openxr/openxr_platform.h

@@ -0,0 +1,819 @@
+#ifndef OPENXR_PLATFORM_H_
+#define OPENXR_PLATFORM_H_ 1
+
+/*
+** Copyright 2017-2026 The Khronos Group Inc.
+**
+** SPDX-License-Identifier: Apache-2.0 OR MIT
+*/
+
+/*
+** This header is generated from the Khronos OpenXR XML API Registry.
+**
+*/
+
+#include "openxr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_KHR_android_thread_settings is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_android_thread_settings 1
+#define XR_KHR_android_thread_settings_SPEC_VERSION 6
+#define XR_KHR_ANDROID_THREAD_SETTINGS_EXTENSION_NAME "XR_KHR_android_thread_settings"
+
+typedef enum XrAndroidThreadTypeKHR {
+    XR_ANDROID_THREAD_TYPE_APPLICATION_MAIN_KHR = 1,
+    XR_ANDROID_THREAD_TYPE_APPLICATION_WORKER_KHR = 2,
+    XR_ANDROID_THREAD_TYPE_RENDERER_MAIN_KHR = 3,
+    XR_ANDROID_THREAD_TYPE_RENDERER_WORKER_KHR = 4,
+    XR_ANDROID_THREAD_TYPE_MAX_ENUM_KHR = 0x7FFFFFFF
+} XrAndroidThreadTypeKHR;
+typedef XrResult (XRAPI_PTR *PFN_xrSetAndroidApplicationThreadKHR)(XrSession session, XrAndroidThreadTypeKHR threadType, uint32_t threadId);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrSetAndroidApplicationThreadKHR(
+    XrSession                                   session,
+    XrAndroidThreadTypeKHR                      threadType,
+    uint32_t                                    threadId);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_KHR_android_surface_swapchain is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_android_surface_swapchain 1
+#define XR_KHR_android_surface_swapchain_SPEC_VERSION 4
+#define XR_KHR_ANDROID_SURFACE_SWAPCHAIN_EXTENSION_NAME "XR_KHR_android_surface_swapchain"
+typedef XrResult (XRAPI_PTR *PFN_xrCreateSwapchainAndroidSurfaceKHR)(XrSession session, const XrSwapchainCreateInfo* info, XrSwapchain* swapchain, jobject* surface);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrCreateSwapchainAndroidSurfaceKHR(
+    XrSession                                   session,
+    const XrSwapchainCreateInfo*                info,
+    XrSwapchain*                                swapchain,
+    jobject*                                    surface);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_KHR_android_create_instance is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_android_create_instance 1
+#define XR_KHR_android_create_instance_SPEC_VERSION 3
+#define XR_KHR_ANDROID_CREATE_INSTANCE_EXTENSION_NAME "XR_KHR_android_create_instance"
+// XrInstanceCreateInfoAndroidKHR extends XrInstanceCreateInfo
+typedef struct XrInstanceCreateInfoAndroidKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    void* XR_MAY_ALIAS          applicationVM;
+    void* XR_MAY_ALIAS          applicationActivity;
+} XrInstanceCreateInfoAndroidKHR;
+
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+
+// XR_KHR_vulkan_swapchain_format_list is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_vulkan_swapchain_format_list 1
+#define XR_KHR_vulkan_swapchain_format_list_SPEC_VERSION 5
+#define XR_KHR_VULKAN_SWAPCHAIN_FORMAT_LIST_EXTENSION_NAME "XR_KHR_vulkan_swapchain_format_list"
+// XrVulkanSwapchainFormatListCreateInfoKHR extends XrSwapchainCreateInfo
+typedef struct XrVulkanSwapchainFormatListCreateInfoKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    uint32_t                    viewFormatCount;
+    const VkFormat*             viewFormats;
+} XrVulkanSwapchainFormatListCreateInfoKHR;
+
+#endif /* XR_USE_GRAPHICS_API_VULKAN */
+
+#ifdef XR_USE_GRAPHICS_API_OPENGL
+
+// XR_KHR_opengl_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_opengl_enable 1
+#define XR_KHR_opengl_enable_SPEC_VERSION 12
+#define XR_KHR_OPENGL_ENABLE_EXTENSION_NAME "XR_KHR_opengl_enable"
+#ifdef XR_USE_PLATFORM_WIN32
+// XrGraphicsBindingOpenGLWin32KHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingOpenGLWin32KHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    HDC                         hDC;
+    HGLRC                       hGLRC;
+} XrGraphicsBindingOpenGLWin32KHR;
+#endif // XR_USE_PLATFORM_WIN32
+
+#ifdef XR_USE_PLATFORM_XLIB
+// XrGraphicsBindingOpenGLXlibKHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingOpenGLXlibKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    Display*                    xDisplay;
+    uint32_t                    visualid;
+    GLXFBConfig                 glxFBConfig;
+    GLXDrawable                 glxDrawable;
+    GLXContext                  glxContext;
+} XrGraphicsBindingOpenGLXlibKHR;
+#endif // XR_USE_PLATFORM_XLIB
+
+#ifdef XR_USE_PLATFORM_XCB
+// XrGraphicsBindingOpenGLXcbKHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingOpenGLXcbKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    xcb_connection_t*           connection;
+    uint32_t                    screenNumber;
+    xcb_glx_fbconfig_t          fbconfigid;
+    xcb_visualid_t              visualid;
+    xcb_glx_drawable_t          glxDrawable;
+    xcb_glx_context_t           glxContext;
+} XrGraphicsBindingOpenGLXcbKHR;
+#endif // XR_USE_PLATFORM_XCB
+
+#ifdef XR_USE_PLATFORM_WAYLAND
+// XrGraphicsBindingOpenGLWaylandKHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingOpenGLWaylandKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    struct wl_display*          display;
+} XrGraphicsBindingOpenGLWaylandKHR;
+#endif // XR_USE_PLATFORM_WAYLAND
+
+typedef struct XrSwapchainImageOpenGLKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    uint32_t              image;
+} XrSwapchainImageOpenGLKHR;
+
+typedef struct XrGraphicsRequirementsOpenGLKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    XrVersion             minApiVersionSupported;
+    XrVersion             maxApiVersionSupported;
+} XrGraphicsRequirementsOpenGLKHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrGetOpenGLGraphicsRequirementsKHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsOpenGLKHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetOpenGLGraphicsRequirementsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsOpenGLKHR*            graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_OPENGL */
+
+#ifdef XR_USE_GRAPHICS_API_OPENGL_ES
+
+// XR_KHR_opengl_es_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_opengl_es_enable 1
+#define XR_KHR_opengl_es_enable_SPEC_VERSION 10
+#define XR_KHR_OPENGL_ES_ENABLE_EXTENSION_NAME "XR_KHR_opengl_es_enable"
+#ifdef XR_USE_PLATFORM_ANDROID
+// XrGraphicsBindingOpenGLESAndroidKHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingOpenGLESAndroidKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    EGLDisplay                  display;
+    EGLConfig                   config;
+    EGLContext                  context;
+} XrGraphicsBindingOpenGLESAndroidKHR;
+#endif // XR_USE_PLATFORM_ANDROID
+
+typedef struct XrSwapchainImageOpenGLESKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    uint32_t              image;
+} XrSwapchainImageOpenGLESKHR;
+
+typedef struct XrGraphicsRequirementsOpenGLESKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    XrVersion             minApiVersionSupported;
+    XrVersion             maxApiVersionSupported;
+} XrGraphicsRequirementsOpenGLESKHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrGetOpenGLESGraphicsRequirementsKHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsOpenGLESKHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetOpenGLESGraphicsRequirementsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsOpenGLESKHR*          graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_OPENGL_ES */
+
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+
+// XR_KHR_vulkan_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_vulkan_enable 1
+#define XR_KHR_vulkan_enable_SPEC_VERSION 10
+#define XR_KHR_VULKAN_ENABLE_EXTENSION_NAME "XR_KHR_vulkan_enable"
+// XrGraphicsBindingVulkanKHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingVulkanKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    VkInstance                  instance;
+    VkPhysicalDevice            physicalDevice;
+    VkDevice                    device;
+    uint32_t                    queueFamilyIndex;
+    uint32_t                    queueIndex;
+} XrGraphicsBindingVulkanKHR;
+
+typedef struct XrSwapchainImageVulkanKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    VkImage               image;
+} XrSwapchainImageVulkanKHR;
+
+typedef struct XrGraphicsRequirementsVulkanKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    XrVersion             minApiVersionSupported;
+    XrVersion             maxApiVersionSupported;
+} XrGraphicsRequirementsVulkanKHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrGetVulkanInstanceExtensionsKHR)(XrInstance instance, XrSystemId systemId, uint32_t bufferCapacityInput, uint32_t* bufferCountOutput, char* buffer);
+typedef XrResult (XRAPI_PTR *PFN_xrGetVulkanDeviceExtensionsKHR)(XrInstance instance, XrSystemId systemId, uint32_t bufferCapacityInput, uint32_t* bufferCountOutput, char* buffer);
+typedef XrResult (XRAPI_PTR *PFN_xrGetVulkanGraphicsDeviceKHR)(XrInstance instance, XrSystemId systemId, VkInstance vkInstance, VkPhysicalDevice* vkPhysicalDevice);
+typedef XrResult (XRAPI_PTR *PFN_xrGetVulkanGraphicsRequirementsKHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsVulkanKHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetVulkanInstanceExtensionsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    uint32_t                                    bufferCapacityInput,
+    uint32_t*                                   bufferCountOutput,
+    char*                                       buffer);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrGetVulkanDeviceExtensionsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    uint32_t                                    bufferCapacityInput,
+    uint32_t*                                   bufferCountOutput,
+    char*                                       buffer);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrGetVulkanGraphicsDeviceKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    VkInstance                                  vkInstance,
+    VkPhysicalDevice*                           vkPhysicalDevice);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrGetVulkanGraphicsRequirementsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsVulkanKHR*            graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_VULKAN */
+
+#ifdef XR_USE_GRAPHICS_API_D3D11
+
+// XR_KHR_D3D11_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_D3D11_enable 1
+#define XR_KHR_D3D11_enable_SPEC_VERSION  11
+#define XR_KHR_D3D11_ENABLE_EXTENSION_NAME "XR_KHR_D3D11_enable"
+// XrGraphicsBindingD3D11KHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingD3D11KHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    ID3D11Device*               device;
+} XrGraphicsBindingD3D11KHR;
+
+typedef struct XrSwapchainImageD3D11KHR {
+     XrStructureType      type;
+    void* XR_MAY_ALIAS    next;
+    ID3D11Texture2D*      texture;
+} XrSwapchainImageD3D11KHR;
+
+typedef struct XrGraphicsRequirementsD3D11KHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    LUID                  adapterLuid;
+    D3D_FEATURE_LEVEL     minFeatureLevel;
+} XrGraphicsRequirementsD3D11KHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrGetD3D11GraphicsRequirementsKHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsD3D11KHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetD3D11GraphicsRequirementsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsD3D11KHR*             graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_D3D11 */
+
+#ifdef XR_USE_GRAPHICS_API_D3D12
+
+// XR_KHR_D3D12_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_D3D12_enable 1
+#define XR_KHR_D3D12_enable_SPEC_VERSION  11
+#define XR_KHR_D3D12_ENABLE_EXTENSION_NAME "XR_KHR_D3D12_enable"
+// XrGraphicsBindingD3D12KHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingD3D12KHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    ID3D12Device*               device;
+    ID3D12CommandQueue*         queue;
+} XrGraphicsBindingD3D12KHR;
+
+typedef struct XrSwapchainImageD3D12KHR {
+     XrStructureType      type;
+    void* XR_MAY_ALIAS    next;
+    ID3D12Resource*       texture;
+} XrSwapchainImageD3D12KHR;
+
+typedef struct XrGraphicsRequirementsD3D12KHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    LUID                  adapterLuid;
+    D3D_FEATURE_LEVEL     minFeatureLevel;
+} XrGraphicsRequirementsD3D12KHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrGetD3D12GraphicsRequirementsKHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsD3D12KHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetD3D12GraphicsRequirementsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsD3D12KHR*             graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_D3D12 */
+
+#ifdef XR_USE_GRAPHICS_API_METAL
+
+// XR_KHR_metal_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_metal_enable 1
+#define XR_KHR_metal_enable_SPEC_VERSION  3
+#define XR_KHR_METAL_ENABLE_EXTENSION_NAME "XR_KHR_metal_enable"
+// XrGraphicsBindingMetalKHR extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingMetalKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    void* XR_MAY_ALIAS          commandQueue;
+} XrGraphicsBindingMetalKHR;
+
+typedef struct XrSwapchainImageMetalKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    void* XR_MAY_ALIAS    texture;
+} XrSwapchainImageMetalKHR;
+
+typedef struct XrGraphicsRequirementsMetalKHR {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    void* XR_MAY_ALIAS    metalDevice;
+} XrGraphicsRequirementsMetalKHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrGetMetalGraphicsRequirementsKHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsMetalKHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetMetalGraphicsRequirementsKHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsMetalKHR*             graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_METAL */
+
+#ifdef XR_USE_PLATFORM_WIN32
+
+// XR_KHR_win32_convert_performance_counter_time is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_win32_convert_performance_counter_time 1
+#define XR_KHR_win32_convert_performance_counter_time_SPEC_VERSION 1
+#define XR_KHR_WIN32_CONVERT_PERFORMANCE_COUNTER_TIME_EXTENSION_NAME "XR_KHR_win32_convert_performance_counter_time"
+typedef XrResult (XRAPI_PTR *PFN_xrConvertWin32PerformanceCounterToTimeKHR)(XrInstance instance, const LARGE_INTEGER* performanceCounter, XrTime* time);
+typedef XrResult (XRAPI_PTR *PFN_xrConvertTimeToWin32PerformanceCounterKHR)(XrInstance instance, XrTime time, LARGE_INTEGER* performanceCounter);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrConvertWin32PerformanceCounterToTimeKHR(
+    XrInstance                                  instance,
+    const LARGE_INTEGER*                        performanceCounter,
+    XrTime*                                     time);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrConvertTimeToWin32PerformanceCounterKHR(
+    XrInstance                                  instance,
+    XrTime                                      time,
+    LARGE_INTEGER*                              performanceCounter);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_WIN32 */
+
+#ifdef XR_USE_TIMESPEC
+
+// XR_KHR_convert_timespec_time is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_convert_timespec_time 1
+#define XR_KHR_convert_timespec_time_SPEC_VERSION 1
+#define XR_KHR_CONVERT_TIMESPEC_TIME_EXTENSION_NAME "XR_KHR_convert_timespec_time"
+typedef XrResult (XRAPI_PTR *PFN_xrConvertTimespecTimeToTimeKHR)(XrInstance instance, const struct timespec* timespecTime, XrTime* time);
+typedef XrResult (XRAPI_PTR *PFN_xrConvertTimeToTimespecTimeKHR)(XrInstance instance, XrTime time, struct timespec* timespecTime);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrConvertTimespecTimeToTimeKHR(
+    XrInstance                                  instance,
+    const struct timespec*                      timespecTime,
+    XrTime*                                     time);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrConvertTimeToTimespecTimeKHR(
+    XrInstance                                  instance,
+    XrTime                                      time,
+    struct timespec*                            timespecTime);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_TIMESPEC */
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_KHR_loader_init_android is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_loader_init_android 1
+#define XR_KHR_loader_init_android_SPEC_VERSION 1
+#define XR_KHR_LOADER_INIT_ANDROID_EXTENSION_NAME "XR_KHR_loader_init_android"
+typedef struct XrLoaderInitInfoAndroidKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    void* XR_MAY_ALIAS          applicationVM;
+    void* XR_MAY_ALIAS          applicationContext;
+} XrLoaderInitInfoAndroidKHR;
+
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+
+// XR_KHR_vulkan_enable2 is a preprocessor guard. Do not pass it to API calls.
+#define XR_KHR_vulkan_enable2 1
+#define XR_KHR_vulkan_enable2_SPEC_VERSION 4
+#define XR_KHR_VULKAN_ENABLE2_EXTENSION_NAME "XR_KHR_vulkan_enable2"
+typedef XrFlags64 XrVulkanInstanceCreateFlagsKHR;
+
+// Flag bits for XrVulkanInstanceCreateFlagsKHR
+
+typedef XrFlags64 XrVulkanDeviceCreateFlagsKHR;
+
+// Flag bits for XrVulkanDeviceCreateFlagsKHR
+
+typedef struct XrVulkanInstanceCreateInfoKHR {
+    XrStructureType                   type;
+    const void* XR_MAY_ALIAS          next;
+    XrSystemId                        systemId;
+    XrVulkanInstanceCreateFlagsKHR    createFlags;
+    PFN_vkGetInstanceProcAddr         pfnGetInstanceProcAddr;
+    const VkInstanceCreateInfo*       vulkanCreateInfo;
+    const VkAllocationCallbacks*      vulkanAllocator;
+} XrVulkanInstanceCreateInfoKHR;
+
+typedef struct XrVulkanDeviceCreateInfoKHR {
+    XrStructureType                 type;
+    const void* XR_MAY_ALIAS        next;
+    XrSystemId                      systemId;
+    XrVulkanDeviceCreateFlagsKHR    createFlags;
+    PFN_vkGetInstanceProcAddr       pfnGetInstanceProcAddr;
+    VkPhysicalDevice                vulkanPhysicalDevice;
+    const VkDeviceCreateInfo*       vulkanCreateInfo;
+    const VkAllocationCallbacks*    vulkanAllocator;
+} XrVulkanDeviceCreateInfoKHR;
+
+typedef XrGraphicsBindingVulkanKHR XrGraphicsBindingVulkan2KHR;
+
+typedef struct XrVulkanGraphicsDeviceGetInfoKHR {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    XrSystemId                  systemId;
+    VkInstance                  vulkanInstance;
+} XrVulkanGraphicsDeviceGetInfoKHR;
+
+typedef XrSwapchainImageVulkanKHR XrSwapchainImageVulkan2KHR;
+
+typedef XrGraphicsRequirementsVulkanKHR XrGraphicsRequirementsVulkan2KHR;
+
+typedef XrResult (XRAPI_PTR *PFN_xrCreateVulkanInstanceKHR)(XrInstance instance, const XrVulkanInstanceCreateInfoKHR* createInfo, VkInstance* vulkanInstance, VkResult* vulkanResult);
+typedef XrResult (XRAPI_PTR *PFN_xrCreateVulkanDeviceKHR)(XrInstance instance, const XrVulkanDeviceCreateInfoKHR* createInfo, VkDevice* vulkanDevice, VkResult* vulkanResult);
+typedef XrResult (XRAPI_PTR *PFN_xrGetVulkanGraphicsDevice2KHR)(XrInstance instance, const XrVulkanGraphicsDeviceGetInfoKHR* getInfo, VkPhysicalDevice* vulkanPhysicalDevice);
+typedef XrResult (XRAPI_PTR *PFN_xrGetVulkanGraphicsRequirements2KHR)(XrInstance instance, XrSystemId systemId, XrGraphicsRequirementsVulkanKHR* graphicsRequirements);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrCreateVulkanInstanceKHR(
+    XrInstance                                  instance,
+    const XrVulkanInstanceCreateInfoKHR*        createInfo,
+    VkInstance*                                 vulkanInstance,
+    VkResult*                                   vulkanResult);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrCreateVulkanDeviceKHR(
+    XrInstance                                  instance,
+    const XrVulkanDeviceCreateInfoKHR*          createInfo,
+    VkDevice*                                   vulkanDevice,
+    VkResult*                                   vulkanResult);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrGetVulkanGraphicsDevice2KHR(
+    XrInstance                                  instance,
+    const XrVulkanGraphicsDeviceGetInfoKHR*     getInfo,
+    VkPhysicalDevice*                           vulkanPhysicalDevice);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrGetVulkanGraphicsRequirements2KHR(
+    XrInstance                                  instance,
+    XrSystemId                                  systemId,
+    XrGraphicsRequirementsVulkanKHR*            graphicsRequirements);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_GRAPHICS_API_VULKAN */
+
+#ifdef XR_USE_PLATFORM_EGL
+
+// XR_MNDX_egl_enable is a preprocessor guard. Do not pass it to API calls.
+#define XR_MNDX_egl_enable 1
+#define XR_MNDX_egl_enable_SPEC_VERSION   2
+#define XR_MNDX_EGL_ENABLE_EXTENSION_NAME "XR_MNDX_egl_enable"
+typedef PFN_xrVoidFunction (*PFN_xrEglGetProcAddressMNDX)(const char *name);
+// XrGraphicsBindingEGLMNDX extends XrSessionCreateInfo
+typedef struct XrGraphicsBindingEGLMNDX {
+    XrStructureType                type;
+    const void* XR_MAY_ALIAS       next;
+    PFN_xrEglGetProcAddressMNDX    getProcAddress;
+    EGLDisplay                     display;
+    EGLConfig                      config;
+    EGLContext                     context;
+} XrGraphicsBindingEGLMNDX;
+
+#endif /* XR_USE_PLATFORM_EGL */
+
+#ifdef XR_USE_PLATFORM_WIN32
+
+// XR_MSFT_perception_anchor_interop is a preprocessor guard. Do not pass it to API calls.
+#define XR_MSFT_perception_anchor_interop 1
+#define XR_MSFT_perception_anchor_interop_SPEC_VERSION 1
+#define XR_MSFT_PERCEPTION_ANCHOR_INTEROP_EXTENSION_NAME "XR_MSFT_perception_anchor_interop"
+typedef XrResult (XRAPI_PTR *PFN_xrCreateSpatialAnchorFromPerceptionAnchorMSFT)(XrSession session, IUnknown* perceptionAnchor, XrSpatialAnchorMSFT* anchor);
+typedef XrResult (XRAPI_PTR *PFN_xrTryGetPerceptionAnchorFromSpatialAnchorMSFT)(XrSession session, XrSpatialAnchorMSFT anchor, IUnknown** perceptionAnchor);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrCreateSpatialAnchorFromPerceptionAnchorMSFT(
+    XrSession                                   session,
+    IUnknown*                                   perceptionAnchor,
+    XrSpatialAnchorMSFT*                        anchor);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrTryGetPerceptionAnchorFromSpatialAnchorMSFT(
+    XrSession                                   session,
+    XrSpatialAnchorMSFT                         anchor,
+    IUnknown**                                  perceptionAnchor);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_WIN32 */
+
+#ifdef XR_USE_PLATFORM_WIN32
+
+// XR_MSFT_holographic_window_attachment is a preprocessor guard. Do not pass it to API calls.
+#define XR_MSFT_holographic_window_attachment 1
+#define XR_MSFT_holographic_window_attachment_SPEC_VERSION 1
+#define XR_MSFT_HOLOGRAPHIC_WINDOW_ATTACHMENT_EXTENSION_NAME "XR_MSFT_holographic_window_attachment"
+#ifdef XR_USE_PLATFORM_WIN32
+// XrHolographicWindowAttachmentMSFT extends XrSessionCreateInfo
+typedef struct XrHolographicWindowAttachmentMSFT {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    IUnknown*                   holographicSpace;
+    IUnknown*                   coreWindow;
+} XrHolographicWindowAttachmentMSFT;
+#endif // XR_USE_PLATFORM_WIN32
+
+#endif /* XR_USE_PLATFORM_WIN32 */
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_FB_android_surface_swapchain_create is a preprocessor guard. Do not pass it to API calls.
+#define XR_FB_android_surface_swapchain_create 1
+#define XR_FB_android_surface_swapchain_create_SPEC_VERSION 1
+#define XR_FB_ANDROID_SURFACE_SWAPCHAIN_CREATE_EXTENSION_NAME "XR_FB_android_surface_swapchain_create"
+typedef XrFlags64 XrAndroidSurfaceSwapchainFlagsFB;
+
+// Flag bits for XrAndroidSurfaceSwapchainFlagsFB
+static const XrAndroidSurfaceSwapchainFlagsFB XR_ANDROID_SURFACE_SWAPCHAIN_SYNCHRONOUS_BIT_FB = 0x00000001;
+static const XrAndroidSurfaceSwapchainFlagsFB XR_ANDROID_SURFACE_SWAPCHAIN_USE_TIMESTAMPS_BIT_FB = 0x00000002;
+
+#ifdef XR_USE_PLATFORM_ANDROID
+// XrAndroidSurfaceSwapchainCreateInfoFB extends XrSwapchainCreateInfo
+typedef struct XrAndroidSurfaceSwapchainCreateInfoFB {
+    XrStructureType                     type;
+    const void* XR_MAY_ALIAS            next;
+    XrAndroidSurfaceSwapchainFlagsFB    createFlags;
+} XrAndroidSurfaceSwapchainCreateInfoFB;
+#endif // XR_USE_PLATFORM_ANDROID
+
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef XR_USE_PLATFORM_ML
+
+// XR_ML_compat is a preprocessor guard. Do not pass it to API calls.
+#define XR_ML_compat 1
+#define XR_ML_compat_SPEC_VERSION         1
+#define XR_ML_COMPAT_EXTENSION_NAME       "XR_ML_compat"
+typedef struct XrCoordinateSpaceCreateInfoML {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    MLCoordinateFrameUID        cfuid;
+    XrPosef                     poseInCoordinateSpace;
+} XrCoordinateSpaceCreateInfoML;
+
+typedef XrResult (XRAPI_PTR *PFN_xrCreateSpaceFromCoordinateFrameUIDML)(XrSession session, const XrCoordinateSpaceCreateInfoML *createInfo, XrSpace* space);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrCreateSpaceFromCoordinateFrameUIDML(
+    XrSession                                   session,
+    const XrCoordinateSpaceCreateInfoML *       createInfo,
+    XrSpace*                                    space);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_ML */
+
+#ifdef XR_USE_PLATFORM_WIN32
+
+// XR_OCULUS_audio_device_guid is a preprocessor guard. Do not pass it to API calls.
+#define XR_OCULUS_audio_device_guid 1
+#define XR_OCULUS_audio_device_guid_SPEC_VERSION 1
+#define XR_OCULUS_AUDIO_DEVICE_GUID_EXTENSION_NAME "XR_OCULUS_audio_device_guid"
+#define XR_MAX_AUDIO_DEVICE_STR_SIZE_OCULUS 128
+typedef XrResult (XRAPI_PTR *PFN_xrGetAudioOutputDeviceGuidOculus)(XrInstance instance, wchar_t buffer[XR_MAX_AUDIO_DEVICE_STR_SIZE_OCULUS]);
+typedef XrResult (XRAPI_PTR *PFN_xrGetAudioInputDeviceGuidOculus)(XrInstance instance, wchar_t buffer[XR_MAX_AUDIO_DEVICE_STR_SIZE_OCULUS]);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrGetAudioOutputDeviceGuidOculus(
+    XrInstance                                  instance,
+    wchar_t                                     buffer[XR_MAX_AUDIO_DEVICE_STR_SIZE_OCULUS]);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrGetAudioInputDeviceGuidOculus(
+    XrInstance                                  instance,
+    wchar_t                                     buffer[XR_MAX_AUDIO_DEVICE_STR_SIZE_OCULUS]);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_WIN32 */
+
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+
+// XR_FB_foveation_vulkan is a preprocessor guard. Do not pass it to API calls.
+#define XR_FB_foveation_vulkan 1
+#define XR_FB_foveation_vulkan_SPEC_VERSION 1
+#define XR_FB_FOVEATION_VULKAN_EXTENSION_NAME "XR_FB_foveation_vulkan"
+// XrSwapchainImageFoveationVulkanFB extends XrSwapchainImageVulkanKHR
+typedef struct XrSwapchainImageFoveationVulkanFB {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    VkImage               image;
+    uint32_t              width;
+    uint32_t              height;
+} XrSwapchainImageFoveationVulkanFB;
+
+#endif /* XR_USE_GRAPHICS_API_VULKAN */
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_FB_swapchain_update_state_android_surface is a preprocessor guard. Do not pass it to API calls.
+#define XR_FB_swapchain_update_state_android_surface 1
+#define XR_FB_swapchain_update_state_android_surface_SPEC_VERSION 1
+#define XR_FB_SWAPCHAIN_UPDATE_STATE_ANDROID_SURFACE_EXTENSION_NAME "XR_FB_swapchain_update_state_android_surface"
+#ifdef XR_USE_PLATFORM_ANDROID
+typedef struct XrSwapchainStateAndroidSurfaceDimensionsFB {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    uint32_t              width;
+    uint32_t              height;
+} XrSwapchainStateAndroidSurfaceDimensionsFB;
+#endif // XR_USE_PLATFORM_ANDROID
+
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef XR_USE_GRAPHICS_API_OPENGL_ES
+
+// XR_FB_swapchain_update_state_opengl_es is a preprocessor guard. Do not pass it to API calls.
+#define XR_FB_swapchain_update_state_opengl_es 1
+#define XR_FB_swapchain_update_state_opengl_es_SPEC_VERSION 1
+#define XR_FB_SWAPCHAIN_UPDATE_STATE_OPENGL_ES_EXTENSION_NAME "XR_FB_swapchain_update_state_opengl_es"
+#ifdef XR_USE_GRAPHICS_API_OPENGL_ES
+typedef struct XrSwapchainStateSamplerOpenGLESFB {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    EGLenum               minFilter;
+    EGLenum               magFilter;
+    EGLenum               wrapModeS;
+    EGLenum               wrapModeT;
+    EGLenum               swizzleRed;
+    EGLenum               swizzleGreen;
+    EGLenum               swizzleBlue;
+    EGLenum               swizzleAlpha;
+    float                 maxAnisotropy;
+    XrColor4f             borderColor;
+} XrSwapchainStateSamplerOpenGLESFB;
+#endif // XR_USE_GRAPHICS_API_OPENGL_ES
+
+#endif /* XR_USE_GRAPHICS_API_OPENGL_ES */
+
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+
+// XR_FB_swapchain_update_state_vulkan is a preprocessor guard. Do not pass it to API calls.
+#define XR_FB_swapchain_update_state_vulkan 1
+#define XR_FB_swapchain_update_state_vulkan_SPEC_VERSION 1
+#define XR_FB_SWAPCHAIN_UPDATE_STATE_VULKAN_EXTENSION_NAME "XR_FB_swapchain_update_state_vulkan"
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+typedef struct XrSwapchainStateSamplerVulkanFB {
+    XrStructureType         type;
+    void* XR_MAY_ALIAS      next;
+    VkFilter                minFilter;
+    VkFilter                magFilter;
+    VkSamplerMipmapMode     mipmapMode;
+    VkSamplerAddressMode    wrapModeS;
+    VkSamplerAddressMode    wrapModeT;
+    VkComponentSwizzle      swizzleRed;
+    VkComponentSwizzle      swizzleGreen;
+    VkComponentSwizzle      swizzleBlue;
+    VkComponentSwizzle      swizzleAlpha;
+    float                   maxAnisotropy;
+    XrColor4f               borderColor;
+} XrSwapchainStateSamplerVulkanFB;
+#endif // XR_USE_GRAPHICS_API_VULKAN
+
+#endif /* XR_USE_GRAPHICS_API_VULKAN */
+
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+
+// XR_META_vulkan_swapchain_create_info is a preprocessor guard. Do not pass it to API calls.
+#define XR_META_vulkan_swapchain_create_info 1
+#define XR_META_vulkan_swapchain_create_info_SPEC_VERSION 1
+#define XR_META_VULKAN_SWAPCHAIN_CREATE_INFO_EXTENSION_NAME "XR_META_vulkan_swapchain_create_info"
+// XrVulkanSwapchainCreateInfoMETA extends XrSwapchainCreateInfo
+typedef struct XrVulkanSwapchainCreateInfoMETA {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    VkImageCreateFlags          additionalCreateFlags;
+    VkImageUsageFlags           additionalUsageFlags;
+} XrVulkanSwapchainCreateInfoMETA;
+
+#endif /* XR_USE_GRAPHICS_API_VULKAN */
+
+#ifdef XR_USE_PLATFORM_ANDROID
+
+// XR_ANDROID_anchor_sharing_export is a preprocessor guard. Do not pass it to API calls.
+#define XR_ANDROID_anchor_sharing_export 1
+#define XR_ANDROID_anchor_sharing_export_SPEC_VERSION 1
+#define XR_ANDROID_ANCHOR_SHARING_EXPORT_EXTENSION_NAME "XR_ANDROID_anchor_sharing_export"
+typedef struct XrAnchorSharingInfoANDROID {
+    XrStructureType             type;
+    const void* XR_MAY_ALIAS    next;
+    XrSpace                     anchor;
+} XrAnchorSharingInfoANDROID;
+
+typedef struct XrAnchorSharingTokenANDROID {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    struct AIBinder*      token;
+} XrAnchorSharingTokenANDROID;
+
+// XrSystemAnchorSharingExportPropertiesANDROID extends XrSystemProperties
+typedef struct XrSystemAnchorSharingExportPropertiesANDROID {
+    XrStructureType       type;
+    void* XR_MAY_ALIAS    next;
+    XrBool32              supportsAnchorSharingExport;
+} XrSystemAnchorSharingExportPropertiesANDROID;
+
+typedef XrResult (XRAPI_PTR *PFN_xrShareAnchorANDROID)(XrSession session, const XrAnchorSharingInfoANDROID* sharingInfo, XrAnchorSharingTokenANDROID* anchorToken);
+typedef XrResult (XRAPI_PTR *PFN_xrUnshareAnchorANDROID)(XrSession session, XrSpace anchor);
+
+#ifndef XR_NO_PROTOTYPES
+#ifdef XR_EXTENSION_PROTOTYPES
+XRAPI_ATTR XrResult XRAPI_CALL xrShareAnchorANDROID(
+    XrSession                                   session,
+    const XrAnchorSharingInfoANDROID*           sharingInfo,
+    XrAnchorSharingTokenANDROID*                anchorToken);
+
+XRAPI_ATTR XrResult XRAPI_CALL xrUnshareAnchorANDROID(
+    XrSession                                   session,
+    XrSpace                                     anchor);
+#endif /* XR_EXTENSION_PROTOTYPES */
+#endif /* !XR_NO_PROTOTYPES */
+#endif /* XR_USE_PLATFORM_ANDROID */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

frame/openxr-compat/vendor/openxr/openxr_platform_defines.h

@@ -0,0 +1,114 @@
+/*
+** Copyright (c) 2017-2026 The Khronos Group Inc.
+**
+** SPDX-License-Identifier: Apache-2.0 OR MIT
+*/
+
+#ifndef OPENXR_PLATFORM_DEFINES_H_
+#define OPENXR_PLATFORM_DEFINES_H_ 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Platform-specific calling convention macros.
+ *
+ * Platforms should define these so that OpenXR clients call OpenXR functions
+ * with the same calling conventions that the OpenXR implementation expects.
+ *
+ * XRAPI_ATTR - Placed before the return type in function declarations.
+ *              Useful for C++11 and GCC/Clang-style function attribute syntax.
+ * XRAPI_CALL - Placed after the return type in function declarations.
+ *              Useful for MSVC-style calling convention syntax.
+ * XRAPI_PTR  - Placed between the '(' and '*' in function pointer types.
+ *
+ * Function declaration:  XRAPI_ATTR void XRAPI_CALL xrFunction(void);
+ * Function pointer type: typedef void (XRAPI_PTR *PFN_xrFunction)(void);
+ */
+#if defined(_WIN32)
+#define XRAPI_ATTR
+// On Windows, functions use the stdcall convention
+#define XRAPI_CALL __stdcall
+#define XRAPI_PTR XRAPI_CALL
+#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH < 7
+#error "API not supported for the 'armeabi' NDK ABI"
+#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7 && defined(__ARM_32BIT_STATE)
+// On Android 32-bit ARM targets, functions use the "hardfloat"
+// calling convention, i.e. float parameters are passed in registers. This
+// is true even if the rest of the application passes floats on the stack,
+// as it does by default when compiling for the armeabi-v7a NDK ABI.
+#define XRAPI_ATTR __attribute__((pcs("aapcs-vfp")))
+#define XRAPI_CALL
+#define XRAPI_PTR XRAPI_ATTR
+#else
+// On other platforms, use the default calling convention
+#define XRAPI_ATTR
+#define XRAPI_CALL
+#define XRAPI_PTR
+#endif
+
+#include <stddef.h>
+
+#if !defined(XR_NO_STDINT_H)
+#if defined(_MSC_VER) && (_MSC_VER < 1600)
+typedef signed __int8 int8_t;
+typedef unsigned __int8 uint8_t;
+typedef signed __int16 int16_t;
+typedef unsigned __int16 uint16_t;
+typedef signed __int32 int32_t;
+typedef unsigned __int32 uint32_t;
+typedef signed __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+#else
+#include <stdint.h>
+#endif
+#endif  // !defined( XR_NO_STDINT_H )
+
+// XR_PTR_SIZE (in bytes)
+#if (defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__) ) || defined(_M_X64) || defined(__ia64) || defined(_M_IA64) || defined(__aarch64__) || defined(__powerpc64__))
+#define XR_PTR_SIZE 8
+#else
+#define XR_PTR_SIZE 4
+#endif
+
+// Needed so we can use clang __has_feature portably.
+#if !defined(XR_COMPILER_HAS_FEATURE)
+#if defined(__clang__)
+#define XR_COMPILER_HAS_FEATURE(x) __has_feature(x)
+#else
+#define XR_COMPILER_HAS_FEATURE(x) 0
+#endif
+#endif
+
+// Identifies if the current compiler has C++11 support enabled.
+// Does not by itself identify if any given C++11 feature is present.
+#if !defined(XR_CPP11_ENABLED) && defined(__cplusplus)
+#if defined(__GNUC__) && defined(__GXX_EXPERIMENTAL_CXX0X__)
+#define XR_CPP11_ENABLED 1
+#elif defined(_MSC_VER) && (_MSC_VER >= 1600)
+#define XR_CPP11_ENABLED 1
+#elif (__cplusplus >= 201103L) // 201103 is the first C++11 version.
+#define XR_CPP11_ENABLED 1
+#endif
+#endif
+
+// Identifies if the current compiler supports C++11 nullptr.
+#if !defined(XR_CPP_NULLPTR_SUPPORTED)
+#if defined(XR_CPP11_ENABLED) &&                                              \
+    ((defined(__clang__) && XR_COMPILER_HAS_FEATURE(cxx_nullptr)) ||          \
+     (defined(__GNUC__) && (((__GNUC__ * 1000) + __GNUC_MINOR__) >= 4006)) || \
+     (defined(_MSC_VER) && (_MSC_VER >= 1600)) ||                             \
+     (defined(__EDG_VERSION__) && (__EDG_VERSION__ >= 403)))
+#define XR_CPP_NULLPTR_SUPPORTED 1
+#endif
+#endif
+
+#if !defined(XR_CPP_NULLPTR_SUPPORTED)
+#define XR_CPP_NULLPTR_SUPPORTED 0
+#endif  // !defined(XR_CPP_NULLPTR_SUPPORTED)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

scripts/keep-awake.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env zsh
+# Mac-side: stop the Steam Frame from going to sleep while an agent works on it.
+#
+# The Frame sleeps when Steam's own idle timer runs out ("Sleep after
+# inactivity": 60 min on AC, 15 min on battery by default). SSH activity
+# doesn't count as input, and asleep the Frame is off the network. `on` sets
+# both timers to Never through Steam's UI (DevTools on 127.0.0.1:8080, via
+# ui/frame_steam.py) and holds a logind sleep inhibitor as a user unit.
+# `off` drops the inhibitor and restores the timers `on` saved.
+#
+# Usage:
+#   scripts/keep-awake.sh on
+#   scripts/keep-awake.sh off
+#   scripts/keep-awake.sh status
+set -euo pipefail
+
+FRAME_ALIAS=${FRAME_ALIAS:-frame}
+HERE=${0:A:h}
+cmd=${1:-status}
+case $cmd in on|off|status) ;; *) echo "usage: keep-awake.sh on|off|status" >&2; exit 2 ;; esac
+
+ssh -o ConnectTimeout=8 "$FRAME_ALIAS" \
+  'mkdir -p ~/.cache/frame-control && cat > ~/.cache/frame-control/frame_steam.py' < "$HERE/../ui/frame_steam.py"
+
+# Runs on the Frame. Verified 2026-09-28 (BUILD_ID 20260925.6191901): the
+# timers are client settings system_idle_suspend_{ac,battery}_sec (0 = Never),
+# written the way Steam's settings page does (steamui module exporting the
+# SetSetting wrapper). logind refuses an inhibitor from an SSH session
+# ("Interactive authentication required") but allows one from a user unit.
+ssh "$FRAME_ALIAS" python3 - "$cmd" <<'EOF'
+import json, os, subprocess, sys
+sys.path.insert(0, os.path.expanduser("~/.cache/frame-control"))
+from frame_steam import Page
+
+cmd = sys.argv[1]
+saved_path = os.path.expanduser("~/.cache/frame-control/keep-awake.json")
+unit = "fc-keep-awake"
+keys = ("system_idle_suspend_ac_sec", "system_idle_suspend_battery_sec")
+
+if cmd == "off":  # release the lock first, even if Steam's UI is down
+    subprocess.run(["systemctl", "--user", "stop", unit], stderr=subprocess.DEVNULL)
+page = Page()
+def read():
+    return {k: page.eval(f"settingsStore.clientSettings.{k}") for k in keys}
+def write(values):
+    page.eval("""(async () => { let req;
+      webpackChunksteamui.push([[Symbol()], {}, r => { req = r }]);
+      const mod = Object.keys(req.m).map(id => req.m[id].toString().includes("Settings.SetSetting") ? req(id) : null).find(Boolean);
+      const set = Object.values(mod).find(f => typeof f == "function" && f.toString().includes("SetSetting("));
+      for (const [k, v] of Object.entries(%s)) await set(k, v);
+      await new Promise(r => setTimeout(r, 1000)); })()""" % json.dumps(values))
+def inhibitor():
+    return subprocess.run(["systemctl", "--user", "is-active", "-q", unit]).returncode == 0
+
+if cmd == "on":
+    current = read()
+    if not os.path.exists(saved_path):
+        with open(saved_path, "w") as f:
+            json.dump(current, f)
+    write({k: 0 for k in keys})
+    if not inhibitor():
+        subprocess.run(["systemd-run", "--user", "-q", f"--unit={unit}",
+                        "--description=Frame Control: keep the Frame awake",
+                        "systemd-inhibit", "--what=sleep:idle:handle-suspend-key:handle-power-key",
+                        "--who=Frame Control", "--why=Keep the Frame awake while an agent works on it",
+                        "--mode=block", "sleep", "infinity"], check=True)
+elif cmd == "off":
+    if os.path.exists(saved_path):  # no backup: leave the timers as they are
+        with open(saved_path) as f:
+            write(json.load(f))
+        os.remove(saved_path)
+
+print(json.dumps({"timers": read(), "inhibitor": inhibitor()}))
+EOF

scripts/publish-release.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+# Publish a tested draft release so running copies of Frame Control offer it
+# (docs/releasing.md). Checks every installer is attached with a SHA-256
+# digest first, since the app's updater refuses assets without one, then
+# attaches update.json, the manifest the updater reads.
+# Usage: scripts/publish-release.sh v0.4.0
+set -eu
+tag="${1:?usage: $0 vX.Y.Z}"
+repo=saphid/frame-control
+expected="Frame-Control-mac-arm64.dmg Frame-Control-mac-arm64.zip Frame-Control-Setup-x64.exe
+Frame-Control-win-x64.zip Frame-Control-linux-x86_64.AppImage Frame-Control-linux-arm64.AppImage
+Frame-Control-linux-amd64.deb Frame-Control-linux-arm64.deb"
+
+info=$(gh release view "$tag" -R "$repo" --json isDraft,isPrerelease,assets)
+version=$(sed -n 's/.*"version": *"\([^"]*\)".*/\1/p' "$(dirname "$0")/../app/package.json")
+[ "v$version" = "$tag" ] || echo "note: app/package.json here says $version (the release was built from the tag)"
+
+missing=""
+for name in $expected; do
+  digest=$(printf '%s' "$info" | python3 -c 'import json,sys
+d=json.load(sys.stdin); n=sys.argv[1]
+print(next((a.get("digest") or "" for a in d["assets"] if a["name"]==n), "absent"))' "$name")
+  case "$digest" in
+    sha256:*) echo "ok       $name" ;;
+    absent) echo "MISSING  $name"; missing=1 ;;
+    *) echo "NO HASH  $name"; missing=1 ;;
+  esac
+done
+[ -z "$missing" ] || { echo "not publishing: fix the assets above" >&2; exit 1; }
+
+# update.json: what running copies read (app/updater.js), from github.com's
+# latest/download link rather than the rate-limited REST API.
+tmp=$(mktemp -d)
+trap 'rm -rf "$tmp"' EXIT
+gh release view "$tag" -R "$repo" --json tagName,url,body,assets | python3 -c 'import json,sys
+d=json.load(sys.stdin)
+names=set(sys.argv[1].split())
+print(json.dumps({"version": d["tagName"].lstrip("v"), "page": d["url"], "notes": d["body"][:4000],
+                  "assets": [{"name": a["name"], "size": a["size"], "digest": a["digest"]}
+                             for a in d["assets"] if a["name"] in names]}, indent=1))' "$expected" > "$tmp/update.json"
+gh release upload "$tag" -R "$repo" "$tmp/update.json" --clobber
+echo "ok       update.json"
+
+gh release edit "$tag" -R "$repo" --draft=false --prerelease=false --latest
+echo "published $tag; running copies will offer it at their next check"

tests/sandbox.py

@@ -0,0 +1,16 @@
+"""Imported first by every test module: nothing a test does reaches this person's
+app data, their telemetry, or the shared compatibility database.
+
+Must run before any ui module is imported, since those read these at import time.
+"""
+import atexit
+import os
+import shutil
+import tempfile
+
+_dir = tempfile.mkdtemp(prefix="frame-control-tests-")
+atexit.register(shutil.rmtree, _dir, ignore_errors=True)
+os.environ["FRAME_CONTROL_DATA_DIR"] = _dir
+os.environ["FRAME_CONTROL_TELEMETRY"] = "0"
+# A maintainer's machine holds the database key; send anything that slips through nowhere.
+os.environ["FRAME_COMPAT_DB_URL"] = "http://127.0.0.1:9"

tests/test_compat_db.py

@@ -2,6 +2,7 @@
 
 Run: python3 -m unittest discover -s tests
 """
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import os
 import sys
 import tempfile

tests/test_connect.py

@@ -3,6 +3,7 @@ steamos-devkit-service, the ~/.ssh/config block, and the mDNS output parsers.
 
 Run: python3 -m unittest discover -s tests
 """
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import json
 import socket
 import sys

tests/test_frame_apk.py

@@ -1,4 +1,5 @@
 """frame_apk against a small APK built here: binary manifest plus resource table."""
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import io
 import os
 import struct

tests/test_frame_apk_versions.py

@@ -1,4 +1,5 @@
 """Offline version lookup with small index-v2 fixtures."""
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import io
 import json
 import os
@@ -242,6 +243,7 @@ class UploadVersionsTest(unittest.TestCase):
             handler.rfile = io.BytesIO(b'x')
             with patch.object(frame_android, 'apk_info', return_value=dict(info)), \
                     patch.object(versions, 'alternatives', side_effect=AssertionError('lookup during upload')) as lookup, \
+                    patch.object(frame_android, 'install_hooks', []), \
                     patch.object(server, 'ensure_master') as ssh:
                 if mode == 'apkinfo':
                     reply = handler.upload()
@@ -256,5 +258,28 @@ class UploadVersionsTest(unittest.TestCase):
                 ssh.assert_not_called()
 
 
+    def test_blocked_uploads_are_reported_like_failed_installs(self):
+        import server
+        info = {'package': 'org.example.app', 'label': 'Example', 'version': '5',
+                'version_code': 5, 'min_sdk': 33, 'abis': [], 'icon_png': None}
+        for apk_info, expected_info in ((dict(info), 'org.example.app'),
+                                        (frame_android.FrameError('not an APK'), None)):
+            handler = object.__new__(server.Handler)
+            handler.headers = {'X-Filename': 'app.apk', 'X-Mode': 'apk', 'Content-Length': '1'}
+            handler.rfile = io.BytesIO(b'x')
+            calls = []
+            patch_info = (patch.object(frame_android, 'apk_info', side_effect=apk_info)
+                          if isinstance(apk_info, Exception) else
+                          patch.object(frame_android, 'apk_info', return_value=apk_info))
+            with patch_info, patch.object(frame_android, 'install_hooks', [lambda *a: calls.append(a)]), \
+                    patch.object(server, 'ensure_master'):
+                with self.assertRaises(server.Failure):
+                    handler.upload()
+            self.assertEqual(len(calls), 1)
+            got_info, meta, error, _ = calls[0]
+            self.assertEqual((got_info or {}).get('package'), expected_info)
+            self.assertIsNone(meta)
+            self.assertIsInstance(error, frame_android.FrameError)
+
 if __name__ == '__main__':
     unittest.main()

tests/test_frame_apk_vr.py

@@ -0,0 +1,297 @@
+"""Local-only VR manifest, raw ZIP and independent signature checks."""
+import io
+import os
+from pathlib import Path
+import struct
+import subprocess
+import sys
+import tempfile
+import unittest
+from unittest.mock import patch
+import zipfile
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / 'ui'))
+import frame_apk
+import frame_apk_vr as vr
+import frame_apk_sign as signing
+import frame_android
+from test_frame_apk import pool
+
+
+DEFAULT = 'android.intent.category.DEFAULT'
+
+
+def manifest(utf8=False, launcher=False, category=None, samsung=False, split=False, alias=False, splash=False):
+    strings = ['manifest', 'package', 'org.test.vr', 'application', 'activity', 'intent-filter',
+               'action', 'category', 'name', vr.MAIN, category or next(iter(sorted(vr.VR))),
+               vr.LAUNCHER, 'http://schemas.android.com/apk/res/android', 'meta-data', 'value',
+               'com.samsung.android.vr.application.mode', 'vr_only', 'activity-alias', DEFAULT, next(iter(sorted(vr.VR))), 'targetActivity', '.Splash', '.Game']
+    def start(tag, attrs=()):
+        body = struct.pack('<IIHHHHHH', 0xffffffff, strings.index(tag), 20, 20, len(attrs), 0, 0, 0)
+        for name, value in attrs:
+            ns = 0xffffffff if name == 'package' else 12
+            body += struct.pack('<IIIHBBI', ns, strings.index(name), strings.index(value), 8, 0, 3, strings.index(value))
+        return struct.pack('<HHIII', 0x102, 16, 16 + len(body), 1, 0xffffffff) + body
+    def end(tag):
+        return struct.pack('<HHIIIII', 0x103, 16, 24, 1, 0xffffffff, 0xffffffff, strings.index(tag))
+    def leaf(tag, attrs):
+        return start(tag, attrs) + end(tag)
+    b = pool(strings, utf8) + start('manifest', [('package', 'org.test.vr')]) + start('application')
+    if samsung:
+        b += leaf('meta-data', [('name', strings[15]), ('value', 'vr_only')])
+    if splash:  # a helper activity with its own MAIN filter, ahead of the game's
+        b += start('activity', [('name', '.Splash')]) + start('intent-filter') + leaf('action', [('name', vr.MAIN)])
+        b += leaf('category', [('name', DEFAULT)]) + end('intent-filter') + end('activity')
+    b += start('activity', [('name', '.Game')] if splash else []) + start('intent-filter') + leaf('action', [('name', vr.MAIN)])
+    b += leaf('category', [('name', strings[10])])
+    if split:
+        b += end('intent-filter') + start('intent-filter')
+    if launcher:
+        b += leaf('category', [('name', vr.LAUNCHER)])
+    b += end('intent-filter') + end('activity')
+    if alias:  # Godot 4: LAUNCHER only on an alias of the activity ('vr' or 'flat')
+        b += start('activity-alias', [('targetActivity', '.Game')] if splash else []) + start('intent-filter') + leaf('action', [('name', vr.MAIN)])
+        if alias == 'vr':
+            b += leaf('category', [('name', next(iter(sorted(vr.VR))))])
+        b += leaf('category', [('name', vr.LAUNCHER)])
+        b += end('intent-filter') + end('activity-alias')
+    b += end('application') + end('manifest')
+    return struct.pack('<HHI', 3, 8, len(b) + 8) + b
+
+
+class VRTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.tmp = tempfile.TemporaryDirectory()
+        cls.keypath = Path(cls.tmp.name) / 'key.json'
+        cls.key = signing.signing_key(cls.keypath)
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.tmp.cleanup()
+
+    def test_manifest_patch(self):
+        for utf8 in (False, True):
+            for category in vr.VR:
+                original = manifest(utf8, category=category)
+                result = vr.add_launcher_category(original)
+                info, filters = vr.inspect(result)
+                self.assertTrue(info['launchable'])
+                self.assertTrue(info['vr'])
+                self.assertIn(vr.LAUNCHER, filters[0]['categories'])
+                self.assertEqual(struct.unpack_from('<I', result, 4)[0], len(result))
+                self.assertEqual(vr.add_launcher_category(result), result)
+                self.assertEqual(vr.add_launcher_category(manifest(utf8, True)), manifest(utf8, True))
+
+    def test_filter_boundaries(self):
+        self.assertFalse(vr.inspect(manifest(launcher=True, split=True))[0]['launchable'])
+        self.assertTrue(vr.inspect(vr.add_launcher_category(manifest(launcher=True, split=True)))[0]['launchable'])
+
+    def test_alias_launcher_is_not_enough(self):
+        # (manifest, still VR after patching)
+        cases = [(manifest(alias='vr'), True),                    # Godot 4 VR export
+                 (manifest(alias='vr', category=DEFAULT), True),  # VR category only on the alias
+                 (manifest(alias='flat', category=DEFAULT), False)]  # Godot 4 flat export
+        for original, is_vr in cases:
+            info, filters = vr.inspect(original)
+            self.assertFalse(info['launchable'])
+            self.assertTrue(info['repairable'])
+            self.assertEqual(len(filters), 1)
+            self.assertFalse(filters[0]['alias'])
+            result = vr.add_launcher_category(original)
+            info, _ = vr.inspect(result)
+            self.assertTrue(info['launchable'])
+            self.assertFalse(info['repairable'])
+            self.assertEqual(info['vr'], is_vr)
+
+    def test_alias_target_activity_is_patched(self):
+        original = manifest(alias='flat', category=DEFAULT, splash=True)
+        info, filters = vr.inspect(original)
+        self.assertTrue(info['repairable'])
+        self.assertEqual(filters[0]['activity'], 'org.test.vr.Game')
+        owner, launchers = None, []
+        for tag, attrs in frame_apk.manifest_elements(vr.add_launcher_category(original)):
+            if tag in ('activity', 'activity-alias'):
+                owner = (tag, attrs.get('name', (0, 0, None))[2])
+            if tag == 'category' and attrs['name'][2] == vr.LAUNCHER:
+                launchers.append(owner)
+        self.assertEqual(launchers, [('activity', '.Game'), ('activity-alias', None)])
+
+    def test_alias_with_launchable_activity_is_left_alone(self):
+        original = manifest(launcher=True, alias='vr')
+        info, _ = vr.inspect(original)
+        self.assertTrue(info['launchable'])
+        self.assertFalse(info['repairable'])
+        self.assertEqual(vr.add_launcher_category(original), original)
+
+    def test_patch_alias_apk(self):
+        with tempfile.TemporaryDirectory() as d:
+            src, dst = Path(d) / 'in.apk', Path(d) / 'out.apk'
+            with zipfile.ZipFile(src, 'w') as z:
+                z.writestr('AndroidManifest.xml', manifest(alias='flat', category=DEFAULT))
+            with patch.object(signing, 'signing_key', return_value=self.key):
+                result = frame_android.patch(src, dst)
+            self.assertEqual(result['patched'], ['launcher'])
+            self.assertTrue(frame_apk.apk_info(dst)['launchable'])
+            self.assertTrue(signing.verify(dst))
+
+    def test_styled_pool(self):
+        for utf8 in (False, True):
+            p = bytearray(pool(['styled'], utf8))
+            old_start = struct.unpack_from('<I', p, 20)[0]
+            p[old_start:old_start] = struct.pack('<I', 0)
+            style_start = len(p)
+            p += struct.pack('<III', 0, 0, 2) + b'\xff' * 12
+            struct.pack_into('<I', p, 4, len(p))
+            struct.pack_into('<I', p, 16, (0x100 if utf8 else 0) | 1)
+            struct.pack_into('<I', p, 12, 1)
+            struct.pack_into('<II', p, 20, old_start + 4, style_start)
+            result, idx = vr._append_string(bytes(p), vr.LAUNCHER)
+            self.assertEqual(frame_apk._string_pool(result, 0), ['styled', vr.LAUNCHER])
+            new_style = struct.unpack_from('<I', result, 24)[0]
+            self.assertEqual(result[new_style:], p[style_start:])
+            self.assertEqual(len(result) % 4, 0)
+
+    def test_detection(self):
+        names = {'lib/arm64-v8a/' + n for n in ('libvrapi.so', 'libopenxr_loader.so', 'libovrplatformloader.so')}
+        info = vr.detection(manifest(category='android.intent.category.LAUNCHER'), names)
+        self.assertTrue(info['vr'])
+        self.assertTrue(info['launchable'])
+        self.assertEqual(len(info['vr_issues']), 3)
+        self.assertFalse(vr.detection(manifest(category=vr.LAUNCHER), set())['vr'])
+        self.assertTrue(vr.detection(manifest(category=vr.LAUNCHER, samsung=True), set())['vr'])
+
+    def test_key_cache(self):
+        with patch.object(signing, '_prime', side_effect=AssertionError('regenerated')):
+            self.assertEqual(signing.signing_key(self.keypath), self.key)
+        if os.name != 'nt':
+            self.assertEqual(self.keypath.stat().st_mode & 0o777, 0o600)
+
+    def test_repack_sign_tamper(self):
+        with tempfile.TemporaryDirectory() as d:
+            src, dst = Path(d) / 'in.apk', Path(d) / 'out.apk'
+            with zipfile.ZipFile(src, 'w') as z:
+                z.writestr('AndroidManifest.xml', manifest(), compress_type=8)
+                z.writestr('classes.dex', b'compress me' * 10000, compress_type=8)
+                z.writestr('resources.arsc', b'1234')
+                z.writestr('lib/arm64-v8a/libx.so', b'ELF' * 500000)
+                z.writestr('META-INF/OLD.RSA', b'old')
+                z.writestr('META-INF/MANIFEST.MF', b'old')
+            with patch.object(signing, 'signing_key', return_value=self.key):
+                result = frame_android.patch(src, dst, {'assets/layer.json': b'{}', 'lib/arm64-v8a/liblayer.so': b'layer'})
+            self.assertEqual(result['patched'], ['launcher'])
+            self.assertTrue(frame_apk.apk_info(dst)['launchable'])
+            self.assertTrue(signing.verify(dst))
+            def compressed(path, info):
+                data = path.read_bytes()
+                nl, el = struct.unpack_from('<HH', data, info.header_offset + 26)
+                start = info.header_offset + 30 + nl + el
+                return data[start:start + info.compress_size], start
+            with zipfile.ZipFile(src) as a, zipfile.ZipFile(dst) as b:
+                self.assertNotIn('META-INF/OLD.RSA', b.namelist())
+                self.assertNotIn('META-INF/MANIFEST.MF', b.namelist())
+                for i in b.infolist():
+                    raw, start = compressed(dst, i)
+                    if i.compress_type == 0:
+                        self.assertEqual(start % (16384 if i.filename.endswith('.so') else 4), 0)
+                    if i.filename in ('classes.dex', 'resources.arsc', 'lib/arm64-v8a/libx.so'):
+                        self.assertEqual(raw, compressed(src, a.getinfo(i.filename))[0])
+                _, off = compressed(dst, b.getinfo('resources.arsc'))
+            original = dst.read_bytes()
+            data = bytearray(original)
+            eo, cd = signing._eocd(data)
+            size = struct.unpack_from('<Q', data, cd - 24)[0]
+            block_start = cd - size - 8
+            value = data[block_start + 20:cd - 24]
+            signer = signing._parts(signing._parts(value)[0])[0]
+            signed, signatures, pub = signing._parts(signer)
+            signature = signing._parts(signing._parts(signatures)[0][4:])[0]
+            sig_offset = data.index(signature, block_start)
+            data[sig_offset] ^= 1
+            dst.write_bytes(data)
+            with self.assertRaisesRegex(ValueError, 'RSA signature'):
+                signing.verify(dst)
+            data = bytearray(original)
+            data[off] ^= 1
+            dst.write_bytes(data)
+            with self.assertRaisesRegex(ValueError, 'digest'):
+                signing.verify(dst)
+
+    @unittest.skipUnless(Path('/usr/bin/openssl').exists(), 'openssl absent')
+    def test_openssl(self):
+        with tempfile.TemporaryDirectory() as d:
+            d = Path(d)
+            (d / 'cert.der').write_bytes(signing.certificate(self.key))
+            (d / 'message').write_bytes(b'independent signature check')
+            (d / 'signature').write_bytes(signing.rsa_sign(b'independent signature check', self.key))
+            def run(*args):
+                return subprocess.run(['/usr/bin/openssl', *args], check=True, capture_output=True).stdout
+            run('x509', '-inform', 'DER', '-in', str(d / 'cert.der'), '-out', str(d / 'cert.pem'))
+            run('verify', '-check_ss_sig', '-CAfile', str(d / 'cert.pem'), str(d / 'cert.pem'))
+            (d / 'pub.pem').write_bytes(run('x509', '-in', str(d / 'cert.pem'), '-pubkey', '-noout'))
+            output = run('dgst', '-sha256', '-verify', str(d / 'pub.pem'), '-signature', str(d / 'signature'), str(d / 'message'))
+            self.assertIn(b'Verified OK', output)
+
+    def test_install_auto_and_override(self):
+        base = {'package': 'org.test.vr', 'label': 'VR', 'abis': [], 'min_sdk': None,
+                'vr': True, 'vr_activity': True, 'launchable': False, 'repairable': True}
+        with patch.object(frame_android, 'apk_info', return_value=base), \
+                patch.object(frame_android, 'xr_compat_files', return_value={}), \
+                patch.object(frame_android, 'patch', return_value={'patched': ['launcher']}) as repair, \
+                patch.object(frame_android, '_install', return_value={}) as install:
+            frame_android.install('original.apk')
+            repair.assert_called_once()
+            self.assertFalse(install.call_args.args[3])
+            self.assertEqual(install.call_args.args[1]['patched'], ['launcher'])
+            frame_android.install('original.apk', flatscreen=True)
+            self.assertTrue(install.call_args.args[3])
+
+    def test_xr_compat_layer(self):
+        with tempfile.TemporaryDirectory() as d:
+            apk = Path(d) / 'a.apk'
+            with zipfile.ZipFile(apk, 'w') as z:
+                z.writestr('lib/arm64-v8a/libopenxr_loader.so', b'')
+            add = frame_android.xr_compat_files(str(apk))
+            self.assertEqual(set(add), set(frame_android.XR_COMPAT_FILES))
+            self.assertIn(b'XR_APILAYER_FRAME_compat', add['assets/openxr/1/api_layers/implicit.d/XrApiLayer_FRAME_compat.json'])
+            self.assertTrue(add['lib/arm64-v8a/libXrApiLayer_FRAME_compat.so'].startswith(b'\x7fELF'))
+            with zipfile.ZipFile(apk, 'a') as z:  # already injected: nothing more to add
+                z.writestr('lib/arm64-v8a/libXrApiLayer_FRAME_compat.so', b'')
+            self.assertEqual(frame_android.xr_compat_files(str(apk)), {})
+            flat = Path(d) / 'flat.apk'
+            with zipfile.ZipFile(flat, 'w') as z:
+                z.writestr('classes.dex', b'')
+            self.assertEqual(frame_android.xr_compat_files(str(flat)), {})
+
+    def test_xr_compat_layer_missing(self):
+        with tempfile.TemporaryDirectory() as d:
+            apk = Path(d) / 'a.apk'
+            with zipfile.ZipFile(apk, 'w') as z:
+                z.writestr('lib/arm64-v8a/libopenxr_loader.so', b'')
+            with patch.object(frame_android, 'XR_COMPAT', d):
+                with self.assertRaisesRegex(frame_android.FrameError, 'build.sh'):
+                    frame_android.xr_compat_files(str(apk))
+
+    def test_patch_rejects_corrupt_manifest_cleanly(self):
+        with patch.object(frame_android, 'apk_info', side_effect=struct.error('bad')):
+            with self.assertRaises(frame_android.FrameError):
+                frame_android.patch('x.apk', 'y.apk')
+
+    def test_install_adds_layer_to_vr_apps(self):
+        base = {'package': 'org.test.vr', 'label': 'VR', 'abis': [], 'min_sdk': None,
+                'vr': True, 'vr_activity': True, 'launchable': True, 'repairable': False}
+        layer = {'x': b''}
+        with patch.object(frame_android, 'apk_info', return_value=dict(base)), \
+                patch.object(frame_android, 'xr_compat_files', return_value=layer), \
+                patch.object(frame_android, 'patch', return_value={'patched': ['openxr-compat']}) as repair, \
+                patch.object(frame_android, '_install', return_value={}) as install:
+            frame_android.install('game.apk')
+            self.assertIs(repair.call_args.args[2], layer)
+            self.assertEqual(install.call_args.args[1]['patched'], ['openxr-compat'])
+            repair.reset_mock()
+            frame_android.install('game.apk', xr_compat=False)  # launchable, no layer: install as is
+            repair.assert_not_called()
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_frame_titles.py

@@ -1,4 +1,5 @@
 """frame_titles without a headset: executable headers, launch targets, zips, runtimes."""
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import json
 import os
 import shutil

tests/test_server.py

@@ -5,6 +5,7 @@ request guards and input validation, which all run before any SSH call.
 
 Run: python3 -m unittest discover -s tests
 """
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import http.client
 import io
 import json

tests/test_steam.py

@@ -2,6 +2,7 @@
 
 Run: python3 -m unittest discover -s tests
 """
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import json
 import subprocess
 import sys

tests/test_telemetry.py

@@ -0,0 +1,448 @@
+"""Anonymous analytics (ui/frame_telemetry.py): what's collected at each level,
+what's scrubbed, and that nothing is sent without a key, the notice, or consent.
+
+Run: python3 -m unittest discover -s tests
+"""
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
+import json
+import os
+import sys
+import tempfile
+import threading
+import time
+import unittest
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from pathlib import Path
+from unittest import mock
+
+ROOT = Path(__file__).resolve().parent.parent
+sys.path.insert(0, str(ROOT / "ui"))
+
+import frame_compat_db as db  # noqa: E402
+import frame_report as fr  # noqa: E402
+import frame_telemetry as tm  # noqa: E402
+
+
+class Base(unittest.TestCase):
+    """A packaged build with a key, its state in a temp folder."""
+
+    def setUp(self):
+        tmp = tempfile.TemporaryDirectory()
+        self.addCleanup(tmp.cleanup)
+        state = Path(tmp.name)
+        for name, value in (("STATE", state), ("SETTINGS", state / "settings.json"),
+                            ("OUTBOX", state / "outbox.jsonl"), ("SENT", state / "sent.jsonl")):
+            p = mock.patch.object(tm, name, value)
+            p.start()
+            self.addCleanup(p.stop)
+        env = mock.patch.dict(os.environ, {"FRAME_CONTROL_POSTHOG_KEY": "phc_test", "FRAME_CONTROL_PACKAGED": "1",
+                                           "FRAME_CONTROL_POSTHOG_HOST": "http://127.0.0.1:9",
+                                           "FRAME_CONTROL_VERSION": "9.9.9"})
+        env.start()
+        self.addCleanup(env.stop)
+        for k in ("DO_NOT_TRACK", "FRAME_CONTROL_TELEMETRY"):
+            os.environ.pop(k, None)
+        tm._seen_errors.clear()
+
+    def queued(self):
+        return tm._read_lines(tm.OUTBOX)
+
+
+class Gates(Base):
+    def test_blocked_without_key_or_in_a_checkout_or_by_do_not_track(self):
+        self.assertIsNone(tm.blocked())
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_POSTHOG_KEY": ""}), \
+                mock.patch.object(tm, "HERE", Path(tempfile.gettempdir()) / "no-config-here"):
+            self.assertIn("key", tm.blocked())
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_PACKAGED": ""}):
+            self.assertIn("source checkout", tm.blocked())
+        with mock.patch.dict(os.environ, {"DO_NOT_TRACK": "1"}):
+            self.assertIn("DO_NOT_TRACK", tm.blocked())
+            self.assertFalse(tm.capture("app_opened"))
+        self.assertFalse(tm.OUTBOX.exists())
+
+    def test_usage_is_on_by_default_the_others_are_opt_in(self):
+        self.assertTrue(tm.capture("app_opened"))
+        self.assertFalse(tm.capture("compat_report", {}, level="compat"))
+        self.assertFalse(tm.capture("$exception", {}, level="diagnostics"))
+        self.assertEqual([e["event"] for e in self.queued()], ["app_opened"])
+
+    def test_events_are_anonymous(self):
+        tm.capture("app_opened")
+        e = self.queued()[0]
+        self.assertEqual(e["distinct_id"], tm.settings()["id"])
+        self.assertIs(e["properties"]["$process_person_profile"], False)
+        self.assertIs(e["properties"]["$geoip_disable"], True)
+        self.assertEqual(e["properties"]["app_version"], "9.9.9")
+
+    def test_turning_a_level_off_drops_its_unsent_events(self):
+        tm.update_settings({"diagnostics": True})
+        tm.capture("app_opened")
+        tm.diagnostic("somewhere", RuntimeError("boom"))
+        self.assertEqual(len(self.queued()), 2)
+        tm.update_settings({"diagnostics": False})
+        self.assertEqual([e["event"] for e in self.queued()], ["app_opened"])
+        tm.update_settings({"usage": False})
+        self.assertEqual(self.queued(), [])
+        self.assertFalse(tm.capture("app_opened"))
+
+    def test_the_same_error_is_sent_once_in_a_while(self):
+        tm.update_settings({"diagnostics": True})
+        for _ in range(3):
+            tm.diagnostic("POST /api/android install", RuntimeError("boom"))
+        self.assertEqual(len(self.queued()), 1)
+
+    def test_page_events_are_checked(self):
+        self.assertTrue(tm.page_event({"event": "tab_viewed", "properties": {"tab": "android", "extra": "x"}})["queued"])
+        self.assertEqual(self.queued()[0]["properties"].get("extra"), None)
+        with self.assertRaises(ValueError):
+            tm.page_event({"event": "anything_else"})
+        with self.assertRaises(ValueError):
+            tm.page_event({"event": "tab_viewed", "properties": {"tab": "/Users/me/secret"}})
+
+
+class Lifecycle(Base):
+    def test_install_update_and_one_open_a_day(self):
+        tm.app_started()
+        tm.app_started()
+        self.assertEqual([e["event"] for e in self.queued()], ["app_installed", "app_opened"])
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_VERSION": "10.0.0"}):
+            tm.app_started()
+        e = self.queued()[-1]
+        self.assertEqual((e["event"], e["properties"]["from_version"]), ("app_updated", "9.9.9"))
+
+    def test_frame_build_once(self):
+        tm.frame_seen("20260922.1", "3.8")
+        tm.frame_seen("20260922.1", "3.8")
+        self.assertEqual(len(self.queued()), 1)
+
+
+class Sending(Base):
+    def serve(self, status=200):
+        got = []
+
+        class H(BaseHTTPRequestHandler):
+            def do_POST(self):
+                got.append((self.path, json.loads(self.rfile.read(int(self.headers["Content-Length"])))))
+                self.send_response(status)
+                self.end_headers()
+                self.wfile.write(b'{"status": 1}')
+
+            def log_message(self, *a):
+                pass
+
+        httpd = HTTPServer(("127.0.0.1", 0), H)
+        threading.Thread(target=httpd.serve_forever, daemon=True).start()
+        self.addCleanup(httpd.server_close)
+        self.addCleanup(httpd.shutdown)
+        os.environ["FRAME_CONTROL_POSTHOG_HOST"] = f"http://127.0.0.1:{httpd.server_port}"
+        return got
+
+    def test_nothing_is_sent_before_the_notice_was_shown(self):
+        got = self.serve()
+        tm.capture("app_opened")
+        self.assertEqual(tm.flush(), 0)
+        self.assertEqual(got, [])
+        tm.update_settings({"noticeShown": True})
+        self.assertEqual(tm.flush(), 1)
+        path, body = got[0]
+        self.assertEqual((path, body["api_key"], body["batch"][0]["event"]), ("/batch/", "phc_test", "app_opened"))
+        self.assertEqual(self.queued(), [])
+        self.assertEqual([e["event"] for e in tm.state()["sent"]], ["app_opened"])
+
+    def test_a_failed_send_keeps_the_events(self):
+        self.serve(status=500)
+        tm.update_settings({"noticeShown": True})
+        tm.capture("app_opened")
+        self.assertEqual(tm.flush(), 0)
+        self.assertEqual(len(self.queued()), 1)
+
+
+class Scrub(unittest.TestCase):
+    def test_personal_details_are_removed(self):
+        home = str(Path.home())
+        text = (f"open {home}/Downloads/My Game.apk failed; ssh alex@192.168.1.20 (frame.local) "
+                "key ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM steam 76561198000000000 mac 3c:22:fb:12:34:56 "
+                "url https://example.com/private/path?token=abc phc_abcdefghijklmnopqrstu C:\\Users\\Bob\\x "
+                "/home/carol/y")
+        out = tm.scrub(text)
+        for leaked in (home, "192.168.1.20", "frame.local", "AAAAC3Nza", "76561198000000000", "3c:22:fb",
+                       "private/path", "phc_abcdefghijklmnopqrstu", "Bob", "carol", "alex@"):
+            self.assertNotIn(leaked, out)
+        self.assertIn("https://example.com/…", out)
+        self.assertIn("~/Downloads", out)
+
+    def test_categories(self):
+        self.assertEqual(tm.categorize("adb: failed to install: INSTALL_FAILED_NO_MATCHING_ABIS: x"),
+                         ("android_installer", "INSTALL_FAILED_NO_MATCHING_ABIS"))
+        self.assertEqual(tm.categorize("X has no arm64-v8a build (armeabi-v7a)")[0], "apk_wrong_abi")
+        self.assertEqual(tm.categorize("ssh: connect to host 10.0.0.2 port 22: Connection refused")[0],
+                         "frame_unreachable")
+        self.assertEqual(tm.categorize("something new")[0], "other")
+
+
+class Compat(Base):
+    def test_reports_are_shared_only_after_opting_in_without_file_names(self):
+        r = {"id": "r1", "package": "org.example", "version": "1.0", "rating": "works", "via": "user",
+             "notes": f"from {Path.home()}/x", "source": "MyPrivateBuild.apk", "date": "2026-09-28T10:00:00"}
+        self.assertFalse(tm.compat_report(r))
+        tm.update_settings({"compat": True})
+        self.assertTrue(tm.compat_report(r))
+        p = self.queued()[-1]["properties"]
+        self.assertEqual((p["package"], p["rating"], p["id"]), ("org.example", "works", "r1"))
+        self.assertNotIn("source", p)
+        self.assertNotIn(str(Path.home()), p["notes"])
+        r2 = dict(r, id="r2", source="https://f-droid.org/repo/org.example_1.apk")
+        tm.compat_report(r2)
+        self.assertEqual(self.queued()[-1]["properties"]["source"], "https://f-droid.org/…")
+
+    def test_opting_in_shares_earlier_local_reports(self):
+        with mock.patch.object(db, "shared", return_value=False), \
+                mock.patch.object(db, "_outbox", return_value=[{"id": "old1", "package": "org.a", "rating": "works",
+                                                                "date": "2026-09-01T00:00:00"}]):
+            tm.update_settings({"compat": True})
+            tm.update_settings({"compat": True})  # already sent: not again
+        self.assertEqual([e["properties"]["id"] for e in self.queued() if e["event"] == "compat_report"], ["old1"])
+
+
+class ApkInstallReports(unittest.TestCase):
+    """server.apk_installed: an APK that won't install is reported; connection trouble isn't."""
+
+    def setUp(self):
+        import server
+        self.server = server
+        for target, name in ((server.frame_catalog, "add_report"), (server.frame_telemetry, "install_finished")):
+            p = mock.patch.object(target, name)
+            setattr(self, name, p.start())
+            self.addCleanup(p.stop)
+
+    def test_wrong_abi_is_an_install_failed_report(self):
+        info = {"package": "org.x", "version": "2.0", "label": "X"}
+        self.server.apk_installed(info, None, self.server.frame_android.FrameError(
+            "X has no arm64-v8a build (armeabi-v7a); Lepton is 64-bit ARM only"), 3.0)
+        args, kw = self.add_report.call_args
+        self.assertEqual((args[0], args[1], kw["result"], kw["via"]), ("org.x", "2.0", "install_failed", "install"))
+        self.assertIs(self.install_finished.call_args[0][1], False)
+
+    def test_connection_trouble_is_not_reported(self):
+        self.server.apk_installed({"package": "org.x", "version": "2.0"}, None,
+                                  self.server.frame_android.FrameError("timed out talking to frame"), 3.0)
+        self.add_report.assert_not_called()
+
+    def test_private_package_names_stay_here(self):
+        with mock.patch.dict(self.server.frame_catalog._cache, {"by_pkg": {"org.public": {}}}):
+            self.server.apk_installed({"package": "com.private.thing", "version": "1"}, {"package": "com.private.thing"},
+                                      None, 2.0)
+            self.assertIsNone(self.install_finished.call_args[1]["package"])
+            self.server.apk_installed({"package": "org.public", "version": "1"}, {"package": "org.public"}, None, 2.0)
+            self.assertEqual(self.install_finished.call_args[1]["package"], "org.public")
+
+
+class CommunitySync(unittest.TestCase):
+    def ev(self, i, who="a", day="2026-09-28", **kw):
+        return ({"id": f"id{i}", "package": "org.x", "rating": "works", "date": f"{day}T00:00:00",
+                 "via": "probe", **kw}, who, f"{day} 10:00:00")
+
+    def test_rows_are_validated_marked_and_capped_per_reporter(self):
+        events = [self.ev(i) for i in range(5)] + [self.ev(9, who="b", rating="nonsense"), self.ev(10, who="b")]
+        rows, skipped = db.community_rows(events, {}, cap=3)
+        self.assertEqual([r["id"] for r in rows], ["id0", "id1", "id2", "id10"])
+        self.assertTrue(all(r["via"] == "community-probe" for r in rows))
+        self.assertEqual(len(skipped), 3)
+
+    def test_the_cap_and_duplicates_hold_across_syncs(self):
+        state = {}
+        rows, _ = db.community_rows([self.ev(i) for i in range(3)], state, cap=3)
+        self.assertEqual(len(rows), 3)
+        rows, skipped = db.community_rows([self.ev(i) for i in range(6)], state, cap=3)  # overlapping re-read
+        self.assertEqual(rows, [])
+        self.assertEqual([why for _, why in skipped], ["over the daily limit for one reporter"] * 3)
+
+    def test_a_malformed_event_is_skipped_not_fatal(self):
+        rows, skipped = db.community_rows([self.ev(1, via=["probe"]), ("not json", "a", "2026-09-28"), self.ev(2)], {})
+        self.assertEqual([r["id"] for r in rows], ["id2"])
+        self.assertEqual(len(skipped), 2)
+
+
+class Regressions(Base):
+    """Findings from the cross-provider review."""
+
+    def test_urls_lose_credentials_paths_and_private_hosts(self):
+        for text, leaked in (("https://alice:secret@example.com/private.apk?token=credential", ("alice", "secret", "private", "credential")),
+                             ("https://alice:secret@192.168.1.4/private.apk", ("alice", "192.168", "private")),
+                             ("fe80::1234 and 2001:db8::5", ("fe80", "2001:db8")),
+                             ("sk-proj-abcdefghijklmnopqrstuv", ("abcdefghijk",)),
+                             ("http://frame.local:8080/x", ("frame.local", "8080"))):
+            out = tm.scrub(text)
+            for s in leaked:
+                self.assertNotIn(s, out, (text, out))
+
+    def test_compat_labels_versions_and_sources_are_scrubbed(self):
+        tm.update_settings({"compat": True})
+        tm.compat_report({"id": "r9", "package": "org.x", "rating": "works", "date": "2026-09-28T00:00:00",
+                          "label": "alice@example.com build", "version": "1.0-alice@example.com",
+                          "source": "https://alice:secret@192.168.1.4/private.apk"})
+        p = self.queued()[-1]["properties"]
+        self.assertNotIn("alice", json.dumps(p))
+        self.assertNotIn("source", p)
+
+    def test_an_unsent_report_is_shared_again_after_opting_out_and_in(self):
+        with mock.patch.object(db, "shared", return_value=False), \
+                mock.patch.object(db, "_outbox", return_value=[{"id": "q1", "package": "org.a", "rating": "works",
+                                                                "date": "2026-09-01T00:00:00"}]):
+            tm.update_settings({"compat": True})
+            tm.update_settings({"compat": False})
+            self.assertEqual(self.queued(), [])
+            tm.update_settings({"compat": True})
+        self.assertEqual([e["properties"]["id"] for e in self.queued() if e["event"] == "compat_report"], ["q1"])
+
+    def test_opting_out_waits_for_a_send_in_progress(self):
+        tm.update_settings({"noticeShown": True})
+        tm.capture("app_opened")
+        order = []
+        started = threading.Event()
+
+        def slow_open(req, timeout):
+            started.set()
+            time.sleep(0.3)
+            order.append("sent")
+            return mock.MagicMock(__enter__=lambda s: s, __exit__=lambda *a: False, read=lambda: b"{}")
+
+        with mock.patch.object(tm.urllib.request, "urlopen", side_effect=slow_open):
+            th = threading.Thread(target=tm.flush)
+            th.start()
+            started.wait(2)
+            tm.update_settings({"usage": False})
+            order.append("opted out")
+            th.join()
+        self.assertEqual(order, ["sent", "opted out"])
+
+    def test_project_id_comes_from_the_config(self):
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_POSTHOG_PROJECT": "12345"}):
+            self.assertEqual(tm.config()["project"], "12345")
+
+
+class ReportProblem(Base):
+    """Report a problem: diagnostics are scrubbed and bounded; the report goes privately to PostHog."""
+
+    def serve(self, status=200):
+        got = []
+
+        class H(BaseHTTPRequestHandler):
+            def do_POST(self):
+                got.append((self.path, json.loads(self.rfile.read(int(self.headers["Content-Length"])))))
+                self.send_response(status)
+                self.end_headers()
+                self.wfile.write(b'{"status":"Ok"}')
+
+            def log_message(self, *a):
+                pass
+
+        httpd = HTTPServer(("127.0.0.1", 0), H)
+        threading.Thread(target=httpd.serve_forever, daemon=True).start()
+        self.addCleanup(httpd.server_close)
+        self.addCleanup(httpd.shutdown)
+        p = mock.patch.dict(os.environ, {"FRAME_CONTROL_POSTHOG_HOST": f"http://127.0.0.1:{httpd.server_port}"})
+        p.start()
+        self.addCleanup(p.stop)
+        return got
+
+    def test_diagnostics_are_scrubbed_and_include_the_log(self):
+        log = tm.STATE / "server.log"
+        log.write_text("GET /api/status 200\nTraceback: ssh alice@192.168.1.9 failed in %s/x\n" % Path.home())
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_LOG": str(log)}):
+            text = fr.diagnostics(["16:00  Install failed: https://bob:pw@example.com/a.apk"], include_logs=True, limit=5000)
+        self.assertIn("Frame Control 9.9.9", text)
+        self.assertIn("Traceback", text)
+        self.assertNotIn("GET /api/status", text)
+        for leaked in ("alice", "192.168.1.9", str(Path.home()), "bob", "pw@"):
+            self.assertNotIn(leaked, text)
+
+    def test_a_report_is_bounded_in_utf16_units(self):
+        body = {"title": "Live view stops", "message": "It stops 😀 " * 800, "diagnostics": "log 😀 line\n" * 2000}
+        title, text, diag = fr.compose(body)
+        self.assertLessEqual(fr.u16(text), fr.TEXT_MAX)
+        self.assertLessEqual(fr.u16(diag), fr.DIAG_MAX)
+        self.assertTrue(text.startswith("It stops"))
+        with self.assertRaises(ValueError):
+            fr.compose({"title": "hi", "message": "It stops after a minute."})
+
+    def test_logs_only_when_asked_and_environment_is_kept_first(self):
+        log = tm.STATE / "server.log"
+        log.write_text("".join(f"old line {i}\n" for i in range(200)) + "newest line\n")
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_LOG": str(log)}):
+            plain = fr.diagnostics(["Copy Jane Doe tax return.pdf to ~/Downloads"])
+            full = fr.diagnostics(["Install failed"], include_logs=True, limit=400)
+        self.assertNotIn("Jane Doe", plain)
+        self.assertNotIn("line", plain)
+        self.assertTrue(full.startswith("Frame Control 9.9.9"))
+        self.assertIn("Install failed", full)
+        self.assertIn("newest line", full)
+        self.assertLessEqual(fr.u16(full), 400)
+
+    def test_the_previewed_diagnostics_are_what_is_sent(self):
+        got = self.serve()
+        fr.send({"title": "Live view stops", "message": "It stops after a minute.",
+                 "diagnostics": "Frame Control 9.9.9\nssh janes-mac.tail12345.ts.net failed"})
+        diag = got[0][1]["batch"][0]["properties"]["diagnostics"]
+        self.assertIn("Frame Control 9.9.9", diag)
+        self.assertNotIn("janes-mac", diag)
+
+    def test_send_is_a_private_posthog_event_whatever_the_settings(self):
+        got = self.serve()
+        tm.update_settings({"usage": False})  # analytics off: a deliberate report still goes
+        res = fr.send({"kind": "idea", "title": "Live view stops", "message": "It stops after a minute.",
+                       "contact": "me@example.com"})
+        path, body = got[0]
+        event = body["batch"][0]
+        self.assertEqual((path, body["api_key"], event["event"]), ("/batch/", "phc_test", "problem_report"))
+        props = event["properties"]
+        self.assertEqual((props["kind"], props["title"], props["message"], props["contact"], props["report_id"]),
+                         ("idea", "Live view stops", "It stops after a minute.", "me@example.com", res["id"]))
+        self.assertEqual((props["$process_person_profile"], props["$geoip_disable"]), (False, True))
+        self.assertNotEqual(event["distinct_id"], tm.settings()["id"])  # not linked to the analytics
+        self.assertIn(res["id"], res["message"])
+        self.assertEqual([e["event"] for e in tm._read_lines(tm.SENT)], ["problem_report"])
+
+    def test_a_sent_report_is_not_an_error_if_the_local_log_fails(self):
+        self.serve()
+        with mock.patch.object(tm, "record_sent", side_effect=OSError("disk full")):
+            res = fr.send({"title": "Live view stops", "message": "It stops after a minute."})
+        self.assertTrue(res["id"])
+
+    def test_events_queued_by_older_versions_get_the_placeholder_address(self):
+        got = self.serve()
+        tm.update_settings({"noticeShown": True})
+        tm._write_lines(tm.OUTBOX, [{"event": "app_opened", "distinct_id": "x", "uuid": "u1",
+                                     "properties": {"level": "usage"}}])
+        self.assertEqual(tm.flush(), 1)
+        self.assertEqual(got[0][1]["batch"][0]["properties"]["$ip"], "0.0.0.0")
+        self.assertEqual(tm._read_lines(tm.SENT)[0]["properties"]["$ip"], "0.0.0.0")
+
+    def test_the_inbox_skips_malformed_reports(self):
+        good = ["2026-09-28T09:50:00Z", "AB12CD34", "bug", "Live view stops", "It stops.", None,
+                "0.4.0", "macOS", "", ""]
+        rows = [["2026-09-28T10:00:00Z", "X", "bug", "Hand-made", None, None, None, None, None, None], ["short"], good]
+        with mock.patch.object(db, "_posthog_query", return_value={"results": rows}), \
+             mock.patch.object(sys, "argv", ["frame_report.py", "inbox"]), \
+             mock.patch("builtins.print") as out:
+            fr.main()
+        printed = " ".join(str(c.args[0]) for c in out.call_args_list if c.args)
+        self.assertIn("AB12CD34", printed)
+        self.assertIn("Hand-made", printed)
+
+    def test_a_refused_report_is_an_error(self):
+        self.serve(status=401)
+        with self.assertRaisesRegex(fr.ReportError, "HTTP 401"):
+            fr.send({"title": "Live view stops", "message": "It stops after a minute."})
+        self.assertEqual(tm._read_lines(tm.SENT), [])
+
+    def test_no_key_means_no_report(self):
+        with mock.patch.dict(os.environ, {"FRAME_CONTROL_POSTHOG_KEY": ""}), \
+             mock.patch.object(tm, "HERE", tm.STATE):
+            with self.assertRaisesRegex(fr.ReportError, "no PostHog project key"):
+                fr.send({"title": "Live view stops", "message": "It stops after a minute."})
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_webinstall.py

@@ -4,6 +4,7 @@ the localhost-testing rule allows.
 
 Run: python3 -m unittest discover -s tests
 """
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
 import hashlib
 import json
 import os

ui/apk_sources/__init__.py

@@ -0,0 +1,45 @@
+"""APK sources: every place Frame Control can find and download APKs.
+
+One module per source kind in this package. Each module exposes the same small
+interface so ``search.py`` can query them all and show where every result came
+from. Python stdlib only; must run on Python 3.9.
+
+Module interface
+----------------
+KIND = 'sidequest'            # stable id of the source kind
+def sources() -> list[dict]   # configured sources of this kind (a kind can have
+                              # several, e.g. one per F-Droid-format repo)
+def search(source, query, limit=50) -> list[dict]   # Entry dicts, best first
+def details(source, entry_id) -> dict               # Entry with 'versions'
+def download(source, entry_id, version_code=None) -> dict
+    # {'apk': local path, 'obb': [paths], 'sha256': hex or None, 'verified': bool}
+    # Raise SourceError with a user-readable message on failure.
+
+Source dict
+-----------
+{'id': 'sidequest', 'kind': KIND, 'name': 'SideQuest', 'url': 'https://...',
+ 'builtin': True, 'enabled': True, 'trust': 'official' | 'community' | 'user'}
+
+Entry dict (missing facts are None, never guessed)
+----------
+{'source': source id, 'id': source-local id, 'package': 'org.example.app' or None,
+ 'name': str, 'summary': str, 'icon': url or None, 'page': url or None,
+ 'version': '1.2', 'version_code': 12, 'min_sdk': 24, 'abis': ['arm64-v8a'],
+ 'vr': True/False/None, 'size': bytes, 'free': True, 'license': 'GPL-3.0' or None,
+ 'updated': 'YYYY-MM-DD', 'downloadable': bool,   # False = open page only
+ 'versions': [ {version, version_code, min_sdk, size, updated}, ... ]}  # details() only
+
+Rules
+-----
+- Only sources that distribute APKs with the developer's consent: free listings,
+  never paid apps re-hosted, no licence or entitlement workarounds.
+- Honour each site's terms and robots rules; if automated download isn't allowed,
+  return entries with 'downloadable': False and a 'page' link instead.
+- Cache indexes under frame_host.cache_dir('apk-sources'); send a clear
+  User-Agent ('FrameControl/<version>'); keep requests modest.
+- Tests use recorded fixtures, never the network.
+"""
+
+
+class SourceError(Exception):
+    """User-readable failure from a source (network, format, verification)."""

ui/frame_android.py

@@ -6,12 +6,18 @@ apps, the lepton-show-flatscreen marker; plus a non-Steam shortcut, so it shows
 in the Steam library and gets its own SteamVR panel. Nothing goes through
 Lepton Development, which wipes its apps on exit. See docs/apks.md.
 
-Python stdlib only. CLI: python3 ui/frame_android.py {info APK|versions APK-or-PKG|install APK|list|launch PKG|stop PKG|remove PKG|probe PKG}
+Python stdlib only. CLI: python3 ui/frame_android.py
+  install APK [--vr|--flat] [--no-xr-compat] | info APK | versions APK-or-PKG
+  patch SRC DST [--add NAME=PATH ...] | list | launch PKG | stop PKG | remove PKG | probe PKG
 """
-import json, os, re, shlex, shutil, subprocess, sys, threading, time, zlib
+import json, os, re, shlex, shutil, struct, subprocess, sys, threading, time, zlib
 
 import frame_apk
 import frame_host
+import tempfile
+import zipfile
+from frame_apk_vr import add_launcher_category
+from frame_apk_sign import repack
 
 ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 FRAME = os.environ.get('FRAME_ALIAS', 'frame')
@@ -20,6 +26,13 @@ COMPAT = '.local/share/Steam/steamapps/compatdata'
 SHADERS = '.local/share/Steam/steamapps/shadercache'
 LAUNCHER = os.path.join(ROOT, 'frame', 'android', 'lepton-app.sh')
 SHORTCUTS = os.path.join(ROOT, 'frame', 'android', 'steam_shortcuts.py')
+# OpenXR API layer that lets OpenXR 1.1 apps run on SteamVR's 1.0-only Android
+# runtime (frame/openxr-compat, docs/vr-apks.md). Injected into VR APKs.
+XR_COMPAT = os.path.join(ROOT, 'frame', 'openxr-compat')
+XR_COMPAT_FILES = {
+    'assets/openxr/1/api_layers/implicit.d/XrApiLayer_FRAME_compat.json': 'XrApiLayer_FRAME_compat.json',
+    'lib/arm64-v8a/libXrApiLayer_FRAME_compat.so': 'prebuilt/arm64-v8a/libXrApiLayer_FRAME_compat.so',
+}
 PKG_RE = re.compile(r'^[A-Za-z][\w]*(\.[A-Za-z_][\w]*)+$')
 SSH_OPTS = ['-o', 'BatchMode=yes', '-o', 'ConnectTimeout=8']
 
@@ -65,6 +78,22 @@ def apk_info(path):
         raise FrameError(f'{os.path.basename(path)}: {e}')
 
 
+def xr_compat_files(apk_path):
+    """The layer's files to add, or {} if the APK has no OpenXR loader or already has the layer."""
+    with zipfile.ZipFile(apk_path) as z:
+        names = set(z.namelist())
+    if 'lib/arm64-v8a/libopenxr_loader.so' not in names or names & set(XR_COMPAT_FILES):
+        return {}
+    add = {}
+    for entry, rel in XR_COMPAT_FILES.items():
+        try:
+            with open(os.path.join(XR_COMPAT, rel), 'rb') as f:
+                add[entry] = f.read()
+        except OSError:
+            raise FrameError("the OpenXR compatibility layer isn't built; run frame/openxr-compat/build.sh")
+    return add
+
+
 def check_installable(info):
     if info['min_sdk'] and info['min_sdk'] > 30:
         raise FrameError(f"{info['label']} needs Android API {info['min_sdk']}; Lepton is Android 11 (API 30)")
@@ -106,7 +135,14 @@ def _write_meta(d, meta):
     ssh(f'cat > {d}/meta.json.tmp && mv {d}/meta.json.tmp {d}/meta.json', input=json.dumps(meta, indent=1))
 
 
-def install(apk_path, flatscreen=True, name=None, source=None, icon_png=None):
+# Called after every install, worked or not, as fn(info, meta, error, seconds):
+# info is None if the APK couldn't be read, meta None and error set if it failed.
+install_hooks = []
+
+
+def install(apk_path, flatscreen=None, name=None, source=None, icon_png=None, xr_compat=None):
+    start, info = time.time(), None
+    try:
         info = apk_info(apk_path)
         if icon_png:
             info['icon_png'] = icon_png
@@ -114,8 +150,33 @@ def install(apk_path, flatscreen=True, name=None, source=None, icon_png=None):
         pkg = info['package']
         if not PKG_RE.match(pkg):
             raise FrameError(f'unexpected package name {pkg!r}')
+        if flatscreen is None:
+            flatscreen = not info['vr']
+        # VR apps get the OpenXR compatibility layer unless told otherwise; it only
+        # changes calls SteamVR would otherwise reject.
+        add = xr_compat_files(apk_path) if (info['vr'] if xr_compat is None else xr_compat) else {}
         with _install_lock:
-        return _install(apk_path, info, pkg, flatscreen, name, source)
+            if add or info['repairable']:
+                with tempfile.TemporaryDirectory(prefix='frame-vr-') as tmp:
+                    patched = os.path.join(tmp, 'app.apk')
+                    info['patched'] = patch(apk_path, patched, add)['patched']
+                    info['launchable'] = True
+                    meta = _install(patched, info, pkg, flatscreen, name, source or os.path.basename(apk_path))
+            else:
+                meta = _install(apk_path, info, pkg, flatscreen, name, source)
+    except FrameError as e:
+        _after_install(info, None, e, start)
+        raise
+    _after_install(info, meta, None, start)
+    return meta
+
+
+def _after_install(info, meta, error, start):
+    for hook in install_hooks:
+        try:
+            hook(info, meta, error, time.time() - start)
+        except Exception:
+            pass  # reporting must never change an install's outcome
 
 
 def _install(apk_path, info, pkg, flatscreen, name, source):
@@ -143,6 +204,8 @@ def _install(apk_path, info, pkg, flatscreen, name, source):
                 raise FrameError(f'Steam did not return a shortcut id (got {reply[:80]!r})')
         meta = {'package': pkg, 'label': name or info['label'], 'version': info['version'],
                 'instance': iid, 'shortcut': shortcut, 'game_id': game_id(shortcut),
+                'vr': info.get('vr', False), 'vr_issues': info.get('vr_issues', []),
+                'launchable': info.get('launchable', False), 'patched': info.get('patched', []),
                 'flatscreen': flatscreen, 'installed': time.strftime('%Y-%m-%dT%H:%M:%S'),
                 'source': source or os.path.basename(apk_path)}
         _write_meta(d, meta)
@@ -273,19 +336,59 @@ def probe(pkg, wait=20):
             'container_up': ctr in running_instances()}
 
 
+def patch(src, dst, add=None):
+    try:
+        info = apk_info(src)
+        with zipfile.ZipFile(src) as z:
+            original = frame_apk._read(z, 'AndroidManifest.xml', frame_apk.MAX_MANIFEST)
+        manifest = add_launcher_category(original) if info['repairable'] else original
+        if not info['launchable'] and not info['repairable']:
+            raise FrameError('APK has no MAIN/LAUNCHER activity that Frame Control can patch')
+        repack(src, dst, replace={'AndroidManifest.xml': manifest}, add=add)
+        result = apk_info(dst)
+        result.pop('icon_png', None)
+        result['patched'] = (['launcher'] if manifest != original else []) + \
+            (['openxr-compat'] if add and set(XR_COMPAT_FILES) <= set(add) else [])
+        return result
+    except (OSError, ValueError, IndexError, struct.error, zipfile.BadZipFile, frame_apk.ApkError) as e:
+        raise FrameError(str(e)) from e
+
+
 def main():
     cmd, *args = sys.argv[1:] or ['help']
     try:
         if cmd in ('info', 'versions'):
             import frame_apk_versions
             if cmd == 'info':
-                print(frame_apk_versions.describe(apk_info(args[0])))
+                info = apk_info(args[0])
+                print(frame_apk_versions.describe(info))
+                fix = '; Frame Control adds the LAUNCHER entry Lepton needs' if info.get('repairable') else ''
+                if info.get('vr') or fix:
+                    print(('VR app' if info.get('vr') else 'Android app') + fix)
+                for note in info.get('vr_issues', []):
+                    print(note)
                 return
             info = apk_info(args[0]) if os.path.isfile(args[0]) or args[0].lower().endswith('.apk') else None
             r = frame_apk_versions.alternatives(
                 info['package'] if info else args[0], info.get('version_code') if info else None)
         elif cmd == 'install':
-            r = install(args[0], flatscreen='--vr' not in args)
+            r = install(args[0], flatscreen=False if '--vr' in args else True if '--flat' in args else None,
+                        xr_compat=False if '--no-xr-compat' in args else None)
+        elif cmd == 'patch':
+            import argparse
+            parser = argparse.ArgumentParser(description='Patch and v2-sign an APK locally')
+            parser.add_argument('src')
+            parser.add_argument('dst')
+            parser.add_argument('--add', action='append', default=[], metavar='NAME=PATH')
+            opts = parser.parse_args(args)
+            additions = {}
+            for item in opts.add:
+                if '=' not in item:
+                    raise FrameError('--add requires NAME=PATH')
+                entry, path = item.split('=', 1)
+                with open(path, 'rb') as f:
+                    additions[entry] = f.read()
+            r = patch(opts.src, opts.dst, additions)
         elif cmd == 'list':
             r = list_apps()
         elif cmd in ('launch', 'stop', 'probe'):
@@ -294,7 +397,7 @@ def main():
             r = remove(args[0], keep_data='--keep-data' in args)
         else:
             sys.exit(__doc__)
-    except FrameError as e:
+    except (FrameError, OSError) as e:
         sys.exit(f'error: {e}')
     print(json.dumps(r, indent=1))
 

ui/frame_apk.py

@@ -10,7 +10,8 @@ import zipfile
 
 # android: attribute resource ids; names can be stripped by shrinkers, ids can't.
 ATTR = {0x01010001: 'label', 0x01010002: 'icon', 0x01010003: 'name',
-        0x0101021b: 'versionCode', 0x0101021c: 'versionName', 0x0101020c: 'minSdkVersion'}
+        0x01010024: 'value', 0x0101021b: 'versionCode', 0x0101021c: 'versionName', 0x0101020c: 'minSdkVersion',
+        0x01010202: 'targetActivity'}
 T_REF, T_STRING, T_INT_DEC, T_INT_HEX = 0x01, 0x03, 0x10, 0x11
 # APKs can come from websites (install links), so nothing read from one may be
 # unbounded. zipfile stops at a member's declared size, so checking it is enough.
@@ -215,8 +216,11 @@ def apk_info(path):
         if 'AndroidManifest.xml' not in names:
             raise ApkError('not an APK: no AndroidManifest.xml')
         try:
-            elements = manifest_elements(_read(z, 'AndroidManifest.xml', MAX_MANIFEST))
+            manifest_data = _read(z, 'AndroidManifest.xml', MAX_MANIFEST)
+            elements = manifest_elements(manifest_data)
             res = Resources(_read(z, 'resources.arsc', MAX_ARSC) if 'resources.arsc' in names else b'')
+            from frame_apk_vr import detection
+            vr_info = detection(manifest_data, names)
         except (struct.error, IndexError, zipfile.BadZipFile) as e:
             raise ApkError(f'could not read the APK manifest: {e}')
         tags = {}
@@ -236,6 +240,7 @@ def apk_info(path):
             'min_sdk': min_sdk[1] if min_sdk and min_sdk[0] in (T_INT_DEC, T_INT_HEX) else None,
             'icon_png': None,
         }
+        info.update(vr_info)
         try:
             info['icon_png'] = _icon_png(z, names, _icons(app.get('icon'), res))
         except Exception:  # noqa: BLE001 - any unreadable icon just means no icon

ui/frame_apk_sign.py

@@ -0,0 +1,361 @@
+"""Lossless ZIP repacking and APK v2 RSA/SHA-256 signing, Python 3.9 stdlib.
+
+Spec: https://source.android.com/docs/security/features/apksigning/v2
+Sections: APK Signing Block; APK Signature Scheme v2 Block; Integrity-protected
+contents; Verification. No verity algorithm is used, so no verity padding.
+"""
+import hashlib
+import io
+import json
+import math
+import os
+from pathlib import Path
+import re
+import secrets
+import struct
+import tempfile
+import zipfile
+import zlib
+
+import frame_host
+
+MAGIC = b'APK Sig Block 42'
+V2 = 0x7109871a
+ALG = 0x0103
+SHA256_DER = bytes.fromhex('3031300d060960864801650304020105000420')
+
+
+def u32(n):
+    return struct.pack('<I', n)
+
+
+def lp(b):
+    return u32(len(b)) + b
+
+
+def der(tag, b):
+    n = len(b)
+    length = bytes([n]) if n < 128 else bytes([128 + (n.bit_length() + 7) // 8]) + n.to_bytes((n.bit_length() + 7) // 8, 'big')
+    return bytes([tag]) + length + b
+
+
+def integer(n):
+    b = n.to_bytes((n.bit_length() + 7) // 8 or 1, 'big')
+    return der(2, (b'\0' if b[0] & 128 else b'') + b)
+
+
+def sequence(*items):
+    return der(0x30, b''.join(items))
+
+
+RSA_ALG = bytes.fromhex('300d06092a864886f70d0101010500')
+CERT_ALG = bytes.fromhex('300d06092a864886f70d01010b0500')
+
+
+def public_key(key):
+    return sequence(RSA_ALG, der(3, b'\0' + sequence(integer(key['n']), integer(key['e']))))
+
+
+def encoded_hash(data, size):
+    digest = SHA256_DER + hashlib.sha256(data).digest()
+    return b'\0\1' + b'\xff' * (size - len(digest) - 3) + b'\0' + digest
+
+
+def rsa_sign(data, key):
+    size = (key['n'].bit_length() + 7) // 8
+    return pow(int.from_bytes(encoded_hash(data, size), 'big'), key['d'], key['n']).to_bytes(size, 'big')
+
+
+def rsa_verify(data, sig, n, e):
+    size = (n.bit_length() + 7) // 8
+    if len(sig) != size or int.from_bytes(sig, 'big') >= n:
+        raise ValueError('invalid RSA signature size/value')
+    actual = pow(int.from_bytes(sig, 'big'), e, n).to_bytes(size, 'big')
+    if actual != encoded_hash(data, size):
+        raise ValueError('RSA signature mismatch')
+
+
+def certificate(key):
+    name = sequence(der(0x31, sequence(bytes.fromhex('0603550403'), der(12, b'Frame Control APK signer'))))
+    validity = sequence(der(0x17, b'200101000000Z'), der(0x18, b'21200101000000Z'))
+    tbs = sequence(der(0xa0, integer(2)), integer(1), CERT_ALG, name, validity, name, public_key(key))
+    return sequence(tbs, CERT_ALG, der(3, b'\0' + rsa_sign(tbs, key)))
+
+
+def _prime(bits):
+    small = (3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47)
+    while True:
+        n = secrets.randbits(bits) | (3 << (bits - 2)) | 1
+        if any(n % p == 0 for p in small) or (n - 1) % 65537 == 0:
+            continue
+        d, s = n - 1, 0
+        while d % 2 == 0:
+            d //= 2
+            s += 1
+        for _ in range(40):  # Miller-Rabin error bound <= 2^-80
+            x = pow(secrets.randbelow(n - 3) + 2, d, n)
+            if x in (1, n - 1):
+                continue
+            for _ in range(s - 1):
+                x = pow(x, 2, n)
+                if x == n - 1:
+                    break
+            else:
+                break
+        else:
+            return n
+
+
+def signing_key(path=None):
+    """Persistent identity in app data, never an evictable cache. Atomic publication.
+
+    Hard-linking a fully written private temp file prevents concurrent first-use
+    callers from selecting different identities or reading a partial key.
+    """
+    path = Path(path) if path is not None else frame_host.data_dir('apk-signing-key.json')
+    if not path.exists():
+        p, q = _prime(1024), _prime(1024)
+        while q == p:
+            q = _prime(1024)
+        key = {'n': p * q, 'e': 65537, 'd': pow(65537, -1, math.lcm(p - 1, q - 1))}
+        path.parent.mkdir(parents=True, exist_ok=True)
+        fd, tmp = tempfile.mkstemp(prefix='.apk-key-', dir=str(path.parent))
+        try:
+            with os.fdopen(fd, 'w') as f:
+                json.dump(key, f)
+                f.flush()
+                os.fsync(f.fileno())
+            try:
+                os.link(tmp, path)  # never replaces a key another process wrote first
+            except FileExistsError:
+                pass
+            except OSError:  # no hard links (FAT/exFAT): plain rename
+                if not path.exists():
+                    os.replace(tmp, path)
+        finally:
+            if os.path.exists(tmp):
+                os.unlink(tmp)
+    os.chmod(path, 0o600)  # Windows ignores this; the per-user app-data folder is the protection there
+    key = json.loads(path.read_text())
+    if key['n'].bit_length() != 2048 or key['e'] != 65537:
+        raise ValueError(f'invalid cached APK signing key; delete {path} to make a new one '
+                         '(re-signed apps then need reinstalling)')
+    rsa_verify(b'key check', rsa_sign(b'key check', key), key['n'], key['e'])
+    return key
+
+
+def _eocd(data):
+    # ZIP comments can contain the EOCD signature; accept only an exact EOF fit.
+    for at in range(len(data) - 22, max(-1, len(data) - 65558), -1):
+        if data[at:at + 4] == b'PK\5\6' and at + 22 + struct.unpack_from('<H', data, at + 20)[0] == len(data):
+            disk, cd_disk, count_disk, count, size, cd = struct.unpack_from('<HHHHII', data, at + 4)
+            if disk or cd_disk or count_disk != count or count == 65535 or cd + size != at:
+                raise ValueError('multi-disk/ZIP64 or invalid APK directory')
+            return at, cd
+    raise ValueError('missing ZIP end record')
+
+
+def content_digest(sections):
+    chunks = []
+    for section in sections:
+        for off in range(0, len(section), 1024 * 1024):
+            part = section[off:off + 1024 * 1024]
+            chunks.append(hashlib.sha256(b'\xa5' + u32(len(part)) + part).digest())
+    return hashlib.sha256(b'\x5a' + u32(len(chunks)) + b''.join(chunks)).digest()
+
+
+def sign_apk(data, key):
+    eo, cd = _eocd(data)
+    digest = content_digest((memoryview(data)[:cd], memoryview(data)[cd:eo], data[eo:]))
+    signed = lp(lp(u32(ALG) + lp(digest))) + lp(lp(certificate(key))) + lp(b'')
+    signer = lp(signed) + lp(lp(u32(ALG) + lp(rsa_sign(signed, key)))) + lp(public_key(key))
+    value = lp(lp(signer))
+    pair = struct.pack('<Q', 4 + len(value)) + u32(V2) + value
+    size = len(pair) + 24
+    block = struct.pack('<Q', size) + pair + struct.pack('<Q', size) + MAGIC
+    end = bytearray(data[eo:])
+    struct.pack_into('<I', end, 16, cd + len(block))
+    return data[:cd] + block + data[cd:eo] + end
+
+
+def _parts(data):
+    result, off = [], 0
+    while off < len(data):
+        if off + 4 > len(data):
+            raise ValueError('truncated length prefix')
+        size = struct.unpack_from('<I', data, off)[0]
+        off += 4
+        if off + size > len(data):
+            raise ValueError('length prefix outside block')
+        result.append(data[off:off + size])
+        off += size
+    return result
+
+
+def _der_parts(data):
+    result, off = [], 0
+    while off < len(data):
+        start = off
+        tag, size = data[off:off + 2]
+        off += 2
+        if size & 128:
+            count = size & 127
+            if not count or count > 4:
+                raise ValueError('invalid DER length')
+            size = int.from_bytes(data[off:off + count], 'big')
+            off += count
+        if off + size > len(data):
+            raise ValueError('truncated DER')
+        result.append((tag, data[off:off + size], data[start:off + size]))
+        off += size
+    return result
+
+
+def _cert_key(cert):
+    outer = _der_parts(cert)
+    if len(outer) != 1 or outer[0][0] != 0x30:
+        raise ValueError('invalid certificate')
+    fields = _der_parts(outer[0][1])
+    tbs = _der_parts(fields[0][1])
+    spki = tbs[6 if tbs[0][0] == 0xa0 else 5][2]
+    pub = _der_parts(_der_parts(spki)[0][1])
+    if pub[0][2] != RSA_ALG or pub[1][1][:1] != b'\0':
+        raise ValueError('certificate is not RSA')
+    numbers = _der_parts(_der_parts(pub[1][1][1:])[0][1])
+    n, e = [int.from_bytes(item[1], 'big') for item in numbers]
+    return n, e, spki
+
+
+def verify(path):
+    """Verify this v2-only format; return True or raise ValueError on corruption.
+
+    A valid signature establishes integrity, not trust in the APK publisher.
+    """
+    data = Path(path).read_bytes()
+    try:
+        eo, cd = _eocd(data)
+        if data[cd - 16:cd] != MAGIC:
+            raise ValueError('no APK signing block')
+        size = struct.unpack_from('<Q', data, cd - 24)[0]
+        start = cd - size - 8
+        if start < 0 or struct.unpack_from('<Q', data, start)[0] != size:
+            raise ValueError('invalid signing block size')
+        off, values = start + 8, []
+        while off < cd - 24:
+            length = struct.unpack_from('<Q', data, off)[0]
+            if length < 4 or off + 8 + length > cd - 24:
+                raise ValueError('invalid signing pair')
+            ident = struct.unpack_from('<I', data, off + 8)[0]
+            if ident == V2:
+                values.append(data[off + 12:off + 8 + length])
+            off += 8 + length
+        if off != cd - 24 or len(values) != 1:
+            raise ValueError('missing or duplicate v2 signer block')
+        end = bytearray(data[eo:])
+        struct.pack_into('<I', end, 16, start)
+        digest = content_digest((memoryview(data)[:start], memoryview(data)[cd:eo], end))
+        wrappers = _parts(values[0])
+        if len(wrappers) != 1:
+            raise ValueError('invalid signers sequence')
+        signers = _parts(wrappers[0])
+        if not signers:
+            raise ValueError('no signers')
+        for signer in signers:
+            signed, signatures, pub = _parts(signer)
+            digests, certs, attrs = _parts(signed)
+            cert = _parts(certs)[0]
+            n, e, cert_pub = _cert_key(cert)
+            if cert_pub != pub:
+                raise ValueError('public key differs from certificate')
+            sigs, digs = _parts(signatures), _parts(digests)
+            if len(sigs) != 1 or len(digs) != 1 or sigs[0][:4] != u32(ALG) or digs[0][:4] != u32(ALG):
+                raise ValueError('unsupported signature algorithm')
+            if _parts(digs[0][4:]) != [digest]:
+                raise ValueError('APK content digest mismatch')
+            sig = _parts(sigs[0][4:])
+            if len(sig) != 1:
+                raise ValueError('invalid signature sequence')
+            rsa_verify(signed, sig[0], n, e)
+        return True
+    except (IndexError, struct.error, OverflowError) as exc:
+        raise ValueError('malformed APK signature: ' + str(exc)) from exc
+
+
+def repack(src, dst, replace=None, add=None, sign=True):
+    """Copy raw compressed members; reconstruct ZIP headers without descriptors.
+
+    Reject ZIP64/encrypted archives. Output is atomically replaced after signing.
+    """
+    replace, add = dict(replace or {}), dict(add or {})
+    central, output = [], io.BytesIO()
+    with open(src, 'rb') as raw, zipfile.ZipFile(raw) as archive:
+        names = archive.namelist()
+        if len(set(names)) != len(names):
+            raise ValueError('duplicate ZIP member names')
+        if set(replace) - set(names) or set(add) & set(names) or set(add) & set(replace):
+            raise ValueError('replace must exist and add must be new')
+        items = archive.infolist() + [zipfile.ZipInfo(name) for name in add]
+        for info in items:
+            name = info.filename
+            if re.match(r'^META-INF/(?:[^/]+\.(?:SF|RSA|EC|DSA)|MANIFEST\.MF)$', name, re.I):
+                continue
+            if info.flag_bits & 1 or info.compress_type not in (0, 8):
+                raise ValueError('unsupported ZIP encryption/compression')
+            method = info.compress_type
+            content = add.get(name) if name in add else replace.get(name)
+            if content is None:
+                raw.seek(info.header_offset)
+                header = raw.read(30)
+                if header[:4] != b'PK\3\4':
+                    raise ValueError('invalid local ZIP header')
+                nl, el = struct.unpack_from('<HH', header, 26)
+                raw.seek(nl + el, 1)
+                compressed = raw.read(info.compress_size)
+                crc, usize = info.CRC, info.file_size
+                if len(compressed) != info.compress_size:
+                    raise ValueError('truncated ZIP member')
+            else:
+                crc, usize = zlib.crc32(content), len(content)
+                if method == 8:
+                    compressor = zlib.compressobj(6, zlib.DEFLATED, -15)
+                    compressed = compressor.compress(content) + compressor.flush()
+                else:
+                    compressed = content
+            encoded = name.encode('utf-8')
+            offset = output.tell()
+            align = 16384 if name.endswith('.so') else 4
+            needs_alignment = method == 0 or name.endswith('.so')
+            padding = (-(offset + 30 + len(encoded) + 6) % align) if needs_alignment else 0
+            # Android zipalign extra: alignment (uint16), then padding bytes.
+            extra = struct.pack('<HHH', 0xd935, padding + 2, align) + bytes(padding) if needs_alignment else b''
+            dt = info.date_time
+            dos_time = (dt[3] << 11) | (dt[4] << 5) | (dt[5] // 2)
+            dos_date = ((dt[0] - 1980) << 9) | (dt[1] << 5) | dt[2]
+            csize = len(compressed)
+            if max(offset, csize, usize) >= 0xffffffff:
+                raise ValueError('ZIP64 APKs are unsupported')
+            output.write(struct.pack('<IHHHHHIIIHH', 0x04034b50, 20, 0x800, method, dos_time, dos_date,
+                                     crc, csize, usize, len(encoded), len(extra)) + encoded + extra + compressed)
+            central.append(struct.pack('<IHHHHHHIIIHHHHHII', 0x02014b50, 0x314, 20, 0x800, method,
+                                       dos_time, dos_date, crc, csize, usize, len(encoded), 0, len(info.comment),
+                                       0, info.internal_attr, info.external_attr, offset) + encoded + info.comment)
+        cd = output.tell()
+        directory = b''.join(central)
+        if len(central) >= 65535 or cd + len(directory) >= 0xffffffff:
+            raise ValueError('ZIP64 APKs are unsupported')
+        output.write(directory)
+        output.write(struct.pack('<IHHHHIIH', 0x06054b50, 0, 0, len(central), len(central), len(directory), cd, len(archive.comment)) + archive.comment)
+    data = output.getvalue()
+    if sign:
+        data = sign_apk(data, signing_key())
+    dst = Path(dst)
+    fd, tmp = tempfile.mkstemp(prefix='.apk-', dir=str(dst.parent))
+    try:
+        with os.fdopen(fd, 'wb') as f:
+            f.write(data)
+        if sign:
+            verify(tmp)
+        os.replace(tmp, dst)
+    finally:
+        if os.path.exists(tmp):
+            os.unlink(tmp)

ui/frame_apk_vr.py

@@ -0,0 +1,128 @@
+"""Binary-manifest VR inspection and minimal launcher repair (stdlib only)."""
+import struct
+import frame_apk
+
+MAIN = 'android.intent.action.MAIN'
+LAUNCHER = 'android.intent.category.LAUNCHER'
+VR = {'com.oculus.intent.category.VR', 'org.khronos.openxr.intent.category.IMMERSIVE_HMD'}
+
+
+def inspect(data):
+    elements = iter(frame_apk.manifest_elements(data))
+    stack, filters, samsung = [], [], False
+    current, owner, package = None, None, ''
+    for kind, hs, off, size in frame_apk._chunks(data, 8, len(data)):
+        if kind == 0x0102:
+            tag, attrs = next(elements)
+            value = attrs.get('name', (None, None, None))[2]
+            if tag == 'manifest':
+                package = attrs.get('package', (None, None, None))[2] or ''
+            if tag in ('activity', 'activity-alias'):
+                owner = attrs.get('targetActivity', (None, None, None))[2] if tag == 'activity-alias' else value
+                if owner and '.' not in owner:  # PackageParser.buildClassName: bare names are relative too
+                    owner = '.' + owner
+                owner = package + owner if owner and owner.startswith('.') else owner
+            if tag == 'intent-filter' and stack and stack[-1] in ('activity', 'activity-alias'):
+                current = {'actions': set(), 'categories': set(), 'templates': [], 'alias': stack[-1] == 'activity-alias', 'activity': owner}
+            if current is not None and stack and stack[-1] == 'intent-filter':
+                if tag == 'action':
+                    current['actions'].add(value)
+                if tag == 'category':
+                    current['categories'].add(value)
+                    current['templates'].append((off, size, hs))
+            if tag == 'meta-data' and stack and stack[-1] == 'application':
+                samsung |= value == 'com.samsung.android.vr.application.mode' and attrs.get('value', (0, 0, None))[2] == 'vr_only'
+            stack.append(tag)
+        elif kind == 0x0103 and stack:
+            tag = stack.pop()
+            if tag == 'intent-filter' and current is not None:
+                current['end'] = off
+                filters.append(current)
+                current = None
+    mains = [f for f in filters if MAIN in f['actions']]
+    vr_filters = [f for f in mains if VR & f['categories']]
+    # Lepton's apk-info-extractor ignores <activity-alias>; Godot 4 puts LAUNCHER only there.
+    real = [f for f in mains if not f['alias']]
+    targets = [f for f in real if VR & f['categories']]
+    if not targets and any(LAUNCHER in f['categories'] or VR & f['categories'] for f in mains if f['alias']):
+        aimed = {f['activity'] for f in mains if f['alias'] and (LAUNCHER in f['categories'] or VR & f['categories'])}
+        targets = [f for f in real if f['templates']]  # the patch copies an existing <category>
+        targets = [f for f in targets if f['activity'] in aimed] or targets
+    launchable = any(LAUNCHER in f['categories'] for f in real)
+    return {'launchable': launchable, 'repairable': not launchable and bool(targets),
+            'vr_activity': bool(vr_filters), 'vr': bool(vr_filters) or samsung}, targets
+
+
+def _append_string(chunk, text):
+    _, hs, size, count, styles, flags, start, style_start = struct.unpack_from('<HHIIIIII', chunk)
+    strings_end = style_start or size
+    encoded = text.encode('utf-8' if flags & 0x100 else 'utf-16-le')
+    # LAUNCHER is short enough for both single-unit length encodings.
+    new = (bytes([len(text), len(encoded)]) + encoded + b'\0' if flags & 0x100
+           else struct.pack('<H', len(text)) + encoded + b'\0\0')
+    string_data = chunk[start:strings_end] + new
+    string_data += bytes(-len(string_data) % 4)
+    header = bytearray(chunk[:hs])
+    new_start = start + 4
+    new_styles = new_start + len(string_data) if style_start else 0
+    body = (chunk[hs:hs + count * 4] + struct.pack('<I', strings_end - start)
+            + chunk[hs + count * 4:start] + string_data + (chunk[style_start:] if style_start else b''))
+    struct.pack_into('<IIIII', header, 8, count + 1, styles, flags & ~1, new_start, new_styles)
+    struct.pack_into('<I', header, 4, len(header) + len(body))
+    return bytes(header) + body, count
+
+
+def add_launcher_category(axml_bytes):
+    info, filters = inspect(axml_bytes)
+    if info['launchable']:
+        return axml_bytes
+    if not filters:
+        raise frame_apk.ApkError('no activity with a MAIN intent filter that Frame Control can patch')
+    target = filters[0]
+    chunks = list(frame_apk._chunks(axml_bytes, 8, len(axml_bytes)))
+    pool = next(c for c in chunks if c[0] == 1)
+    _, _, po, ps = pool
+    new_pool, index = _append_string(axml_bytes[po:po + ps], LAUNCHER)
+    off, size, hs = target['templates'][0]
+    start = bytearray(axml_bytes[off:off + size])
+    attr_start, attr_size, count = struct.unpack_from('<HHH', start, hs + 8)
+    strings = frame_apk._string_pool(axml_bytes, po)
+    resmap = []
+    for kind, header_size, offset, chunk_size in chunks:
+        if kind == 0x180:
+            resmap = struct.unpack_from('<%dI' % ((chunk_size - header_size) // 4),
+                                        axml_bytes, offset + header_size)
+    for i in range(count):
+        a = hs + attr_start + i * attr_size
+        name = struct.unpack_from('<I', start, a + 4)[0]
+        if (name < len(resmap) and resmap[name] == 0x01010003) or strings[name] == 'name':
+            struct.pack_into('<I', start, a + 8, index)
+            struct.pack_into('<HBBI', start, a + 12, 8, 0, 3, index)
+            break
+    else:
+        raise frame_apk.ApkError('category has no name attribute')
+    end = struct.pack('<HHI', 0x0103, hs, hs + 8) + start[8:hs] + start[hs:hs + 8]
+    result = bytearray(axml_bytes[:8])
+    for _, _, off, size in chunks:
+        if off == target['end']:
+            result += start + end
+        result += new_pool if off == po else axml_bytes[off:off + size]
+    struct.pack_into('<I', result, 4, len(result))
+    result = bytes(result)
+    if not inspect(result)[0]['launchable']:
+        raise frame_apk.ApkError('launcher repair failed verification')
+    return result
+
+
+def detection(data, names):
+    info, _ = inspect(data)
+    issues = []
+    if 'lib/arm64-v8a/libvrapi.so' in names:
+        issues.append("Uses Meta's legacy VrApi, which the Frame doesn't have; it won't run.")
+    if any(n.endswith('/libovrplatformloader.so') for n in names):
+        issues.append("Uses Meta's platform SDK; if it checks your Quest store licence it will quit.")
+    if 'lib/arm64-v8a/libopenxr_loader.so' in names:
+        info['vr'] = True
+        issues.append('Uses OpenXR (good).')
+    info['vr_issues'] = issues
+    return info

ui/frame_compat_db.py

@@ -8,12 +8,18 @@ New reports go to a local outbox first and are sent from there, so nothing is
 lost offline. A mirror of every report is kept for offline reads. Both live in
 frame_host.data_dir('compat-db'). Python stdlib only.
 
-CLI: python3 ui/frame_compat_db.py {count|export FILE|import FILE|flush}
+Everyone else can opt in to sharing (the Privacy panel): their reports then
+also go to PostHog as compat_report events (frame_telemetry.py), and the
+maintainer's `sync` pulls them into the database, at most SYNC_DAILY_CAP per
+reporter per day, marked via=community[-probe|-install].
+
+CLI: python3 ui/frame_compat_db.py {count|export FILE|import FILE|flush|sync}
 (import restores a backup; reports already in the database are skipped.)
 """
 import json, os, subprocess, sys, threading, time, urllib.error, urllib.parse, urllib.request, uuid
 
 import frame_host
+import frame_telemetry
 
 URL = os.environ.get('FRAME_COMPAT_DB_URL', 'https://frame-compat.lakebed.app')
 KEYCHAIN = ('frame-control-compat-db', 'app-key')
@@ -228,11 +234,153 @@ def add(report):
         if shared():
             flush()
             _mem['at'] = 0  # refetch on next load
+        else:
+            frame_telemetry.compat_report(r)  # only if this person opted in to sharing
     except Exception:
         pass  # stays queued; load() shows it and a later call sends it
     return r
 
 
+# ---- community reports: PostHog -> the database (maintainer only) ---------------
+
+POSTHOG_KEYCHAIN = ('frame-control-posthog', 'personal-api-key')
+SYNC_STATE = os.path.join(STATE, 'posthog-sync.json')
+SYNC_DAILY_CAP = 30
+COMMUNITY_VIA = {'user': 'community', 'probe': 'community-probe', 'install': 'community-install'}
+
+
+def posthog_personal_key():
+    k = os.environ.get('POSTHOG_PERSONAL_API_KEY')
+    if k:
+        return k
+    if frame_host.MAC:
+        p = subprocess.run(['security', 'find-generic-password', '-s', POSTHOG_KEYCHAIN[0], '-a',
+                            POSTHOG_KEYCHAIN[1], '-w'], capture_output=True, text=True)
+        if p.returncode == 0 and p.stdout.strip():
+            return p.stdout.strip()
+    raise DBError('No PostHog personal API key (set POSTHOG_PERSONAL_API_KEY, or on macOS the Keychain '
+                  f'item service {POSTHOG_KEYCHAIN[0]}, account {POSTHOG_KEYCHAIN[1]})')
+
+
+def _posthog_query(sql):
+    cfg = frame_telemetry.config()
+    project = os.environ.get('FRAME_CONTROL_POSTHOG_PROJECT') or cfg.get('project')
+    if not project:
+        raise DBError('No PostHog project id (ui/telemetry.json "project", or FRAME_CONTROL_POSTHOG_PROJECT)')
+    # The query API lives on the app host (us.posthog.com), not the ingestion host (us.i.posthog.com).
+    host = cfg['host'].replace('.i.posthog.com', '.posthog.com')
+    req = urllib.request.Request(f'{host}/api/projects/{urllib.parse.quote(str(project))}/query/', method='POST',
+                                 data=json.dumps({'query': {'kind': 'HogQLQuery', 'query': sql}}).encode(),
+                                 headers={'authorization': 'Bearer ' + posthog_personal_key(),
+                                          'content-type': 'application/json'})
+    try:
+        with _opener.open(req, timeout=60) as r:
+            return json.loads(r.read())
+    except urllib.error.HTTPError as e:
+        raise DBError(f'PostHog said HTTP {e.code}: {e.read()[:300]!r}')
+    except (urllib.error.URLError, TimeoutError, OSError, ValueError) as e:
+        raise DBError(f"can't reach PostHog: {e}")
+
+
+SYNC_OVERLAP_DAYS = 30  # re-read this far back: offline copies send late, with their original time
+SYNC_PAGE = 5000
+
+
+def community_rows(events, state, cap=SYNC_DAILY_CAP):
+    """(reports, skipped): compat_report events as database rows. `state` ({"seen": {id: day},
+    "counts": {"reporter|day": n}}) persists between syncs, so an event read twice is handled
+    once and each reporter gets at most `cap` reports a day in total."""
+    seen, counts = state.setdefault('seen', {}), state.setdefault('counts', {})
+    out, skipped = [], []
+    for props, reporter, ts in events:
+        if isinstance(props, str):
+            try:
+                props = json.loads(props)
+            except ValueError:
+                props = None
+        if not isinstance(props, dict):
+            skipped.append((None, 'unreadable properties'))
+            continue
+        bad = [k for k in (*FIELDS, 'id') if props.get(k) is not None and not isinstance(props[k], (str, int, float))]
+        if bad:
+            skipped.append((str(props.get('id'))[:60], f'bad field {bad[0]}'))
+            continue
+        r = {k: (str(props[k]) if props.get(k) is not None else None) for k in FIELDS}
+        r['id'] = str(props['id']) if props.get('id') is not None else None
+        if r['id'] in seen:
+            continue  # handled in an earlier sync (or earlier in this one)
+        r['via'] = COMMUNITY_VIA.get(r.get('via') or 'user', 'community')
+        why = problem(r)
+        if why:
+            skipped.append((r.get('id'), why))
+            continue
+        day = str(ts)[:10]
+        seen[r['id']] = day
+        key_ = f'{reporter}|{day}'
+        if counts.get(key_, 0) >= cap:
+            skipped.append((r['id'], 'over the daily limit for one reporter'))
+            continue
+        counts[key_] = counts.get(key_, 0) + 1
+        out.append(r)
+    return out, skipped
+
+
+def _sync_state():
+    try:
+        with open(SYNC_STATE) as f:
+            s = json.load(f)
+        return s if isinstance(s, dict) else {}
+    except (OSError, ValueError):
+        return {}
+
+
+def _save_sync_state(s):
+    """Forget ids and counts older than the overlap window (plus a margin)."""
+    cutoff = time.strftime('%Y-%m-%d', time.gmtime(time.time() - (SYNC_OVERLAP_DAYS + 15) * 86400))
+    s['seen'] = {k: d for k, d in s.get('seen', {}).items() if d >= cutoff}
+    s['counts'] = {k: n for k, n in s.get('counts', {}).items() if k.rsplit('|', 1)[-1] >= cutoff}
+    os.makedirs(STATE, exist_ok=True)
+    with open(SYNC_STATE + '.tmp', 'w') as f:
+        json.dump(s, f)
+    os.replace(SYNC_STATE + '.tmp', SYNC_STATE)
+
+
+def sync(dry_run=False):
+    """Pull community reports from PostHog into the database. Returns (added, skipped).
+    Reads the last SYNC_OVERLAP_DAYS each time, since events carry the time they were
+    made, not when they arrived; the saved state keeps that from adding anything twice."""
+    key()  # the maintainer's copy only
+    state = _sync_state()
+    since = time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(time.time() - SYNC_OVERLAP_DAYS * 86400))
+    events, after = [], f"timestamp >= toDateTime('{since}', 'UTC')"
+    for _ in range(40):
+        # Keyset paging: PostHog refuses OFFSET with a personal API key. The cursor is in UTC,
+        # since a local time is ambiguous in the hour clocks go back.
+        res = _posthog_query("SELECT properties, distinct_id, timestamp, toString(uuid), "
+                             "formatDateTime(timestamp, '%Y-%m-%d %H:%i:%S.%f', 'UTC') FROM events "
+                             f"WHERE event = 'compat_report' AND {after} "
+                             f"ORDER BY timestamp, toString(uuid) LIMIT {SYNC_PAGE}")
+        rows = res.get('results') or []
+        events += [row[:3] for row in rows]
+        if len(rows) < SYNC_PAGE:
+            break
+        last_uuid, last_ts = rows[-1][3], rows[-1][4]
+        after = (f"(timestamp > toDateTime64('{last_ts}', 6, 'UTC') OR "
+                 f"(timestamp = toDateTime64('{last_ts}', 6, 'UTC') AND toString(uuid) > '{last_uuid}'))")
+    rows, skipped = community_rows(events, state)
+    if dry_run:
+        return rows, skipped
+    if rows:
+        os.makedirs(STATE, exist_ok=True)
+        with _lock, open(OUTBOX, 'a') as f:
+            f.writelines(json.dumps(r, ensure_ascii=False) + '\n' for r in rows)
+    # Saved before sending: the rows are in the outbox now, and flush retries them if sending fails.
+    _save_sync_state(state)
+    flush()  # also retries rows a failed earlier sync left in the outbox
+    _mem['at'] = 0
+    return rows, skipped
+
+
 def main():
     cmd, *args = sys.argv[1:] or ['count']
     try:
@@ -260,6 +408,12 @@ def main():
                   'reports already in the database were not duplicated')
         elif cmd == 'flush':
             print(f'{flush()} still queued')
+        elif cmd == 'sync':
+            rows, skipped = sync(dry_run='--dry-run' in args)
+            for rid, why in skipped:
+                print(f'skipped {rid!r}: {why}', file=sys.stderr)
+            print(f"{len(rows)} community reports {'found' if '--dry-run' in args else 'added'}, "
+                  f'{len(skipped)} skipped')
         else:
             sys.exit(__doc__)
     except DBError as e:

ui/frame_host.py

@@ -33,8 +33,11 @@ class HostError(RuntimeError):
 
 
 def data_dir(*parts):
-    """Per-user app data: ~/Library/Application Support, %APPDATA% or $XDG_DATA_HOME."""
-    if MAC:
+    """Per-user app data: ~/Library/Application Support, %APPDATA% or $XDG_DATA_HOME
+    (or $FRAME_CONTROL_DATA_DIR, which the tests point at a throwaway directory)."""
+    if os.environ.get("FRAME_CONTROL_DATA_DIR"):
+        base = Path(os.environ["FRAME_CONTROL_DATA_DIR"])
+    elif MAC:
         base = Path.home() / "Library" / "Application Support" / "Frame Control"
     elif WINDOWS:
         base = Path(os.environ.get("APPDATA") or Path.home() / "AppData" / "Roaming") / "Frame Control"

ui/frame_report.py

@@ -0,0 +1,161 @@
+"""Report a problem from inside Frame Control. Python stdlib only.
+
+The page's Report a problem dialog shows the diagnostics below before anything
+is sent, then this sends the report privately to Frame Control's PostHog
+project as a `problem_report` event: only the maintainer can read it, and
+nothing is published. It is sent whatever the analytics settings are, because
+the person sends it deliberately. Diagnostics are scrubbed first
+(frame_telemetry.scrub); the person's own words are sent as written.
+"""
+import os
+import platform
+import sys
+import time
+import uuid
+
+import frame_host
+import frame_telemetry
+
+KINDS = ('bug', 'idea', 'question', 'other')
+TEXT_MAX = 5000     # the person's own text, in JavaScript (UTF-16) units like the page's maxlength
+DIAG_MAX = 8000     # the diagnostics block
+LOG_LINES = 60
+ACTIVITY_LINES = 25
+
+frame = {}  # the Frame's last known SteamOS build, set by server.status()
+
+
+def u16(s):
+    """Length as the website's validator counts it (JavaScript strings are UTF-16)."""
+    return len(s.encode('utf-16-le')) // 2
+
+
+def cut(s, n):
+    """s shortened to at most n UTF-16 units, never splitting a character."""
+    while u16(s) > n:
+        s = s[:max(0, len(s) - max(1, (u16(s) - n) // 2))]
+    return s
+
+
+def _log_tail():
+    """The last lines of the server log the app writes (FRAME_CONTROL_LOG), newest first."""
+    path = os.environ.get('FRAME_CONTROL_LOG')
+    if not path:
+        return []
+    try:
+        with open(path, 'rb') as f:
+            f.seek(0, os.SEEK_END)
+            f.seek(max(0, f.tell() - 64 * 1024))
+            lines = f.read().decode('utf-8', 'replace').splitlines()
+    except OSError:
+        return []
+    # Request lines ("GET /api/status ...") are noise; keep what went wrong.
+    keep = [ln for ln in lines if ln.strip() and not ln.startswith(('GET ', 'POST '))]
+    return list(reversed(keep[-LOG_LINES:]))
+
+
+def diagnostics(activity=(), include_logs=False, limit=DIAG_MAX):
+    """What a report includes, scrubbed and at most `limit` UTF-16 units. Always the versions
+    and builds; recent activity and the server log only when asked for, since they can name
+    files. Sections are filled in order of use, newest lines first, so trimming drops the oldest."""
+    t = frame_telemetry.state()
+    levels = ', '.join(f"{name} {'on' if on else 'off'}" for name, on in
+                       (('usage', t['usage']), ('compat', t['compat']), ('error details', t['diagnostics'])))
+    env = [
+        f"Frame Control {frame_telemetry.app_version()}"
+        f"{' (built app)' if os.environ.get('FRAME_CONTROL_PACKAGED') else ' (source checkout)'}",
+        f"Computer: {frame_host.NAME} {platform.release()} {platform.machine()}, Python {'%d.%d.%d' % sys.version_info[:3]}",
+        f"SteamOS: {frame.get('build') or 'unknown'} ({frame.get('version') or 'not connected since start'})",
+        f"Analytics: {levels}",
+        f"Report time: {time.strftime('%Y-%m-%d %H:%M %Z')}",
+    ]
+    out = frame_telemetry.scrub('\n'.join(env), limit=limit)
+    if not include_logs:
+        return cut(out, limit)
+    sections = [('Recent activity (newest first):', [str(a)[:300] for a in list(activity)[:ACTIVITY_LINES] if isinstance(a, str)]),
+                ('Server log (newest first):', _log_tail())]
+    for title, lines in sections:
+        if not lines:
+            continue
+        block = '\n\n' + title
+        if u16(out + block) > limit:
+            break
+        out += block
+        for line in lines:
+            line = '\n' + frame_telemetry.scrub(line, 300)
+            if u16(out + line) > limit:
+                break
+            out += line
+    return out
+
+
+def compose(body):
+    """(title, text, diagnostics): the diagnostics exactly as the dialog previewed them (passed
+    back, scrubbed again and bounded here)."""
+    title = ' '.join(str(body.get('title') or '').split())
+    text = str(body.get('message') or '').strip()
+    if len(title) < 5:
+        raise ValueError('give it a short title (at least 5 characters)')
+    if len(text) < 10:
+        raise ValueError('say a little more about what happened (at least 10 characters)')
+    diag = body.get('diagnostics')
+    diag = cut(frame_telemetry.scrub(diag, 40000), DIAG_MAX) if isinstance(diag, str) and diag.strip() else ''
+    return cut(title, 120), cut(text, TEXT_MAX), diag
+
+
+def send(body):
+    """Send the report to PostHog. Returns {"id", "message"}; raises ReportError."""
+    kind = body.get('kind') if body.get('kind') in KINDS else 'bug'
+    title, text, diag = compose(body)
+    ref = uuid.uuid4().hex[:8].upper()
+    props = {**frame_telemetry.common(), 'kind': kind, 'title': title, 'message': text,
+             'contact': str(body.get('contact') or '').strip()[:120], 'diagnostics': diag,
+             'report_id': ref, 'steamos': str(frame.get('build') or '')[:120], 'level': 'report'}
+    # Its own random id: a report can carry contact details, so it isn't linked to this copy's analytics.
+    event = {'event': 'problem_report', 'distinct_id': str(uuid.uuid4()), 'uuid': str(uuid.uuid4()),
+             'timestamp': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()), 'properties': props}
+    try:
+        frame_telemetry.post([event], timeout=30)
+    except frame_telemetry.SendError as e:
+        raise ReportError(str(e))
+    try:
+        frame_telemetry.record_sent([event])
+    except OSError:
+        pass  # it was sent; failing to log it here mustn't make the person send it again
+    return {'id': ref, 'message': f'Sent privately to the Frame Control developer (report {ref}).'}
+
+
+class ReportError(RuntimeError):
+    pass
+
+
+def inbox(days=30):
+    """The maintainer's recent reports from PostHog, newest first (needs the personal API key
+    frame_compat_db.sync uses)."""
+    import frame_compat_db
+    res = frame_compat_db._posthog_query(
+        "SELECT timestamp, properties.report_id, properties.kind, properties.title, properties.message, "
+        "properties.contact, properties.app_version, properties.os, properties.steamos, properties.diagnostics "
+        f"FROM events WHERE event = 'problem_report' AND timestamp > now() - INTERVAL {int(days)} DAY "
+        "ORDER BY timestamp DESC LIMIT 200")
+    return res.get('results') or []
+
+
+def main():
+    cmd, *args = sys.argv[1:] or ['inbox']
+    if cmd != 'inbox':
+        sys.exit('usage: frame_report.py inbox [days]')
+    for row in inbox(*(args[:1] or [30])):
+        if not isinstance(row, list) or len(row) != 10:
+            continue
+        ts, ref, kind, title, text, contact, version, osname, steamos, diag = (str(v or '') for v in row)
+        print(f"== {ts[:16].replace('T', ' ')}  {ref}  [{kind}] {title}")
+        print(f"   {version} on {osname}, SteamOS {steamos or 'unknown'}{', reply to ' + contact if contact else ''}")
+        print('   ' + text.replace('\n', '\n   '))
+        if diag:
+            print('   --- diagnostics\n   ' + diag.replace('\n', '\n   '))
+        print()
+
+
+if __name__ == '__main__':
+    main()

ui/frame_telemetry.py

@@ -0,0 +1,545 @@
+"""Anonymous analytics for Frame Control, sent to PostHog. Python stdlib only.
+
+Three levels, each chosen in the page's Privacy panel (docs/privacy.md lists
+every event and property):
+
+- usage (on by default, after the first-run notice has been shown): installs of
+  Frame Control, daily opens, updates, which tabs are used, and whether installs
+  on the Frame worked, with an error category from a fixed list. Never file
+  names, paths, hostnames, IP addresses, window titles or account data.
+- compat (opt-in): Android compatibility reports, the same fields the Report
+  dialog shows, so they reach the shared database (frame_compat_db.py). The
+  maintainer's sync (python3 ui/frame_compat_db.py sync) moves them there.
+- diagnostics (opt-in): error messages and Python tracebacks, scrubbed of
+  home folders, user names, addresses and keys.
+
+The first-run notice offers compat and diagnostics together, and the page's
+Report a problem dialog (frame_report.py) sends bug reports privately to the
+same project whatever is chosen here.
+
+Events are identified by a random id made on first run, not by the person or
+computer, and sent without person profiles or GeoIP. Nothing is sent without a
+project key (ui/telemetry.json or $FRAME_CONTROL_POSTHOG_KEY), from a source
+checkout unless $FRAME_CONTROL_TELEMETRY=1, or when $DO_NOT_TRACK=1 or
+$FRAME_CONTROL_TELEMETRY=0.
+
+Events wait in an outbox file and are sent in batches from a background thread,
+so going offline loses nothing. The last SENT_KEEP sent events are kept on this
+computer so the page can show exactly what left it.
+"""
+import ipaddress
+import json
+import os
+import platform
+import re
+import sys
+import threading
+import time
+import traceback
+import urllib.error
+import urllib.request
+import uuid
+from pathlib import Path
+from urllib.parse import urlsplit
+
+import frame_host
+
+HERE = Path(__file__).resolve().parent
+STATE = frame_host.data_dir('telemetry')
+SETTINGS = STATE / 'settings.json'
+OUTBOX = STATE / 'outbox.jsonl'
+SENT = STATE / 'sent.jsonl'
+SENT_KEEP = 200
+OUTBOX_MAX = 2000  # events kept while offline; the oldest go first
+FLUSH_EVERY = 60
+REPEAT_WINDOW = 600  # the same diagnostic error is sent at most once in this many seconds
+DEFAULT_HOST = 'https://us.i.posthog.com'
+
+LEVELS = ('usage', 'compat', 'diagnostics')
+# Events the page may send through /api/telemetry, and the properties each may carry.
+PAGE_EVENTS = {'tab_viewed': {'tab'}, 'update_offered': {'to_version'},
+               'update_started': {'to_version'}, 'update_failed': {'to_version', 'error_category'}}
+TABS = {'home', 'games', 'android', 'tools'}
+
+_lock = threading.RLock()
+_send_lock = threading.Lock()  # held while sending; consent changes wait for it
+_seen_errors = {}
+_flusher = None
+_wake = threading.Event()
+
+
+# ---- configuration and settings -------------------------------------------------
+
+def config():
+    """PostHog host and project key: the environment, else ui/telemetry.json."""
+    try:
+        with open(HERE / 'telemetry.json') as f:
+            c = json.load(f)
+    except (OSError, ValueError):
+        c = {}
+    host = os.environ.get('FRAME_CONTROL_POSTHOG_HOST') or c.get('host') or DEFAULT_HOST
+    key = os.environ.get('FRAME_CONTROL_POSTHOG_KEY') or c.get('key') or ''
+    project = os.environ.get('FRAME_CONTROL_POSTHOG_PROJECT') or c.get('project') or ''
+    return {'host': host.rstrip('/'), 'key': key, 'project': str(project)}
+
+
+def blocked():
+    """Why nothing may be sent at all, whatever the settings say, or None."""
+    if os.environ.get('DO_NOT_TRACK') == '1' or os.environ.get('FRAME_CONTROL_TELEMETRY') == '0':
+        return 'turned off by DO_NOT_TRACK or FRAME_CONTROL_TELEMETRY=0'
+    if not config()['key']:
+        return 'no PostHog project key in this build'
+    if not os.environ.get('FRAME_CONTROL_PACKAGED') and os.environ.get('FRAME_CONTROL_TELEMETRY') != '1':
+        return 'running from a source checkout (set FRAME_CONTROL_TELEMETRY=1 to send)'
+    return None
+
+
+def _defaults():
+    return {'id': str(uuid.uuid4()), 'usage': True, 'compat': False, 'diagnostics': False,
+            'notice_shown': False, 'installed_sent': False, 'last_version': None, 'last_open_day': None,
+            'frames_seen': [], 'compat_sent': []}
+
+
+def settings():
+    with _lock:
+        s = _defaults()
+        try:
+            with open(SETTINGS) as f:
+                saved = json.load(f)
+            if isinstance(saved, dict):
+                s.update({k: v for k, v in saved.items() if k in s})
+        except (OSError, ValueError):
+            pass
+        if not SETTINGS.exists():
+            _save(s)  # keep the id stable from the first call
+        return s
+
+
+def _save(s):
+    try:
+        STATE.mkdir(parents=True, exist_ok=True)
+        tmp = SETTINGS.with_suffix('.tmp')
+        tmp.write_text(json.dumps(s, indent=1))
+        os.replace(tmp, SETTINGS)
+    except OSError:
+        pass
+
+
+def enabled(level):
+    """Whether events of this level are collected: never when sending is blocked, so a
+    source checkout or a test run leaves nothing behind."""
+    if blocked():
+        return False
+    return bool(settings().get(level))
+
+
+def update_settings(changes):
+    """Apply the page's choices. Turning a level off drops its unsent events; a send already
+    under way finishes first, so nothing leaves after this returns."""
+    with _send_lock, _lock:
+        s = settings()
+        if 'noticeShown' in changes:
+            s['notice_shown'] = bool(changes['noticeShown']) or s['notice_shown']
+        for level in LEVELS:
+            if level in changes:
+                s[level] = bool(changes[level])
+                s['notice_shown'] = True
+        _save(s)
+        _drop_unwanted(s)
+    if changes.get('compat'):
+        backfill_compat()
+    _wake.set()
+    return state()
+
+
+def state():
+    """What the page shows: the choices, why sending is blocked, and what was sent."""
+    s = settings()
+    return {'usage': s['usage'], 'compat': s['compat'], 'noticeShown': s['notice_shown'],
+            'diagnostics': s['diagnostics'],
+            'blocked': blocked(), 'id': s['id'], 'queued': len(_read_lines(OUTBOX)),
+            'sent': list(reversed(_read_lines(SENT)))[:50]}
+
+
+# ---- scrubbing and error categories ---------------------------------------------
+
+def _user_names():
+    names = set()
+    for v in (os.environ.get('USER'), os.environ.get('USERNAME'), Path.home().name):
+        if v and len(v) > 2:
+            names.add(v)
+    return names
+
+
+URL_RE = re.compile(r'[A-Za-z][A-Za-z0-9+.-]*://[^\s\'"<>]+')
+SCRUBS = [
+    (re.compile(r'ssh-(?:rsa|ed25519|dss)\s+\S+'), '<ssh-key>'),
+    (re.compile(r'-----BEGIN [^-]+-----.*?-----END [^-]+-----', re.S), '<pem>'),
+    (re.compile(r'\b(?:phc|phx|ghp|gho|ghu|ghs|github_pat|sk|pk|rk|xox[abpr])[_-][A-Za-z0-9_-]{12,}'), '<token>'),
+    (re.compile(r'(?i)\b(token|key|secret|password|passwd|pwd|auth|signature|sig)=[^\s&]+'), r'\1=<redacted>'),
+    (re.compile(r'[\w.+-]+@[\w-]+(?:\.[\w-]+)+'), '<email>'),
+    (re.compile(r'\b(?:\d{1,3}\.){3}\d{1,3}\b'), '<ip>'),
+    (re.compile(r'\b(?:[0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2}\b'), '<mac>'),
+    (re.compile(r'\b7656119\d{10}\b'), '<steamid>'),
+    (re.compile(r'\b(?:[\w-]+\.)+(?:local|lan|home|internal|localdomain|ts\.net)\b'), '<host>'),
+    (re.compile(r'\b[0-9a-fA-F]{32,}\b'), '<hex>'),
+]
+IPV6_RE = re.compile(r'(?<![\w:])[0-9A-Fa-f]{0,4}(?::[0-9A-Fa-f]{0,4}){2,7}(?:%\w+)?(?![\w:])')
+
+
+def _ipv6(m):
+    try:
+        ipaddress.IPv6Address(m.group(0).split('%')[0])
+        return '<ip>'
+    except ValueError:
+        return m.group(0)
+
+
+def public_host(host):
+    """A host name that's safe to send: not an address, not a private or single-label name."""
+    host = (host or '').lower().rstrip('.')
+    if not host or '.' not in host:
+        return None
+    try:
+        ipaddress.ip_address(host.strip('[]'))
+        return None
+    except ValueError:
+        pass
+    if re.search(r'\.(?:local|lan|home|internal|localdomain|ts\.net|arpa)$', host) or not re.fullmatch(r'[a-z0-9.-]+', host):
+        return None
+    return host
+
+
+def _scrub_url(u):
+    """Only the scheme and a public host name of a URL; never user names, passwords, ports,
+    paths or queries."""
+    try:
+        parts = urlsplit(u)
+        host = public_host(parts.hostname)
+    except ValueError:
+        host = None
+    return f'{parts.scheme}://{host}/…' if host else '<url>'
+
+
+def scrub(text, limit=2000):
+    """Text with URLs, home folders, user names, addresses, hosts, ids and keys replaced."""
+    if text is None:
+        return None
+    t = URL_RE.sub(lambda m: _scrub_url(m.group(0)), str(text))  # first, before anything splits a URL
+    home = str(Path.home())
+    if len(home) > 3:
+        t = t.replace(home, '~')
+    t = re.sub(r'(/Users/|/home/|[A-Za-z]:\\Users\\)[^/\\\s]+', r'\1<user>', t)
+    for pattern, repl in SCRUBS:
+        t = pattern.sub(repl, t)
+    t = IPV6_RE.sub(_ipv6, t)
+    for name in _user_names():
+        t = re.sub(r'\b%s\b' % re.escape(name), '<user>', t)
+    return t[:limit]
+
+
+# From the most to the least specific; the first match wins.
+CATEGORIES = [
+    ('android_installer', re.compile(r'INSTALL_(?:FAILED|PARSE_FAILED)_[A-Z_]+')),
+    ('apk_needs_newer_android', re.compile(r'needs Android API')),
+    ('apk_wrong_abi', re.compile(r'no arm64-v8a build')),
+    ('apk_unreadable', re.compile(r'(?i)not a zip|bad apk|AndroidManifest|ApkError|unexpected package name')),
+    ('cant_run_on_frame', re.compile(r"can't run on the Frame")),
+    ('steam_shortcut', re.compile(r'(?i)steam did not return a shortcut|shortcut list|no Steam shortcut')),
+    ('frame_not_set_up', re.compile(r'(?i)Could not resolve hostname|no "?frame"? (?:SSH )?alias')),
+    ('frame_auth', re.compile(r'(?i)Permission denied|Host key verification failed')),
+    ('frame_unreachable', re.compile(r'(?i)timed out|Connection (?:refused|reset|closed)|No route to host|'
+                                     r'Network is unreachable|Operation timed out|asleep|kex_exchange')),
+    ('frame_disk_full', re.compile(r'(?i)No space left|disk full|ENOSPC')),
+    ('download_failed', re.compile(r'(?i)HTTP (?:Error )?\d{3}|URLError|download|certificate verify failed')),
+    ('flatpak', re.compile(r'(?i)flatpak|flathub')),
+    ('cancelled', re.compile(r'(?i)cancel')),
+    ('lepton', re.compile(r'(?i)lepton|podman|instance')),
+]
+
+
+def categorize(message):
+    """(category, detail): a fixed category name, plus an Android installer code when there is one."""
+    text = str(message or '')
+    for name, pattern in CATEGORIES:
+        m = pattern.search(text)
+        if m:
+            return name, (m.group(0) if name == 'android_installer' else None)
+    return 'other', None
+
+
+# ---- capturing ------------------------------------------------------------------
+
+def common():
+    return {'app_version': app_version(), 'os': frame_host.NAME, 'arch': platform.machine().lower(),
+            'python': '%d.%d' % sys.version_info[:2], '$lib': 'frame-control',
+            # Anonymous events: no person profile, no location lookup, and a placeholder address,
+            # since PostHog stores the sender's IP unless an event gives one.
+            '$process_person_profile': False, '$geoip_disable': True, '$ip': '0.0.0.0'}
+
+
+def app_version():
+    v = os.environ.get('FRAME_CONTROL_VERSION')
+    if v:
+        return v
+    try:
+        with open(HERE.parent / 'app' / 'package.json') as f:
+            return json.load(f).get('version') or 'dev'
+    except (OSError, ValueError):
+        return 'dev'
+
+
+def capture(event, props=None, level='usage'):
+    """Queue an event if its level is on. Never raises."""
+    try:
+        if level not in LEVELS or not enabled(level):
+            return False
+        s = settings()
+        e = {'event': event, 'distinct_id': s['id'], 'uuid': str(uuid.uuid4()),
+             'timestamp': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()),
+             'properties': {**common(), **(props or {}), 'level': level}}
+        with _lock:
+            lines = _read_lines(OUTBOX) + [e]
+            _write_lines(OUTBOX, lines[-OUTBOX_MAX:])
+        return True
+    except Exception:
+        return False
+
+
+def page_event(body):
+    """An event from the page, checked against PAGE_EVENTS."""
+    name = body.get('event')
+    allowed = PAGE_EVENTS.get(name)
+    if allowed is None:
+        raise ValueError('unknown event')
+    props = {k: str(v)[:40] for k, v in (body.get('properties') or {}).items() if k in allowed}
+    if name == 'tab_viewed' and props.get('tab') not in TABS:
+        raise ValueError('unknown tab')
+    return {'queued': capture(name, props)}
+
+
+def app_started():
+    """Once per server start: first install, an update, and one open a day."""
+    if blocked():
+        return
+    with _lock:
+        s = settings()
+        version, today = app_version(), time.strftime('%Y-%m-%d')
+        if not s['installed_sent']:
+            capture('app_installed')
+            s['installed_sent'] = True
+        elif s['last_version'] and s['last_version'] != version:
+            capture('app_updated', {'from_version': s['last_version']})
+        if s['last_open_day'] != today:
+            capture('app_opened')
+            s['last_open_day'] = today
+        s['last_version'] = version
+        _save(s)
+
+
+def frame_seen(build, version):
+    """The Frame's SteamOS build, once per build (public build numbers)."""
+    key = f'{build}/{version}'
+    with _lock:
+        s = settings()
+        if not build or key in s['frames_seen']:
+            return
+        s['frames_seen'] = (s['frames_seen'] + [key])[-20:]
+        _save(s)
+    capture('frame_connected', {'steamos_build': str(build)[:40], 'steamos_version': str(version or '')[:40]})
+
+
+def install_finished(kind, ok, seconds=None, error=None, **props):
+    """kind: apk, flatpak, steam, title or web. props must already be public (no file names)."""
+    p = {'kind': kind, 'ok': bool(ok), **{k: v for k, v in props.items() if v is not None}}
+    if seconds is not None:
+        p['seconds'] = round(seconds, 1)
+    if error is not None:
+        p['error_category'], code = categorize(error)
+        if code:
+            p['installer_code'] = code
+    capture('install_finished', p)
+    if error is not None and not ok:
+        diagnostic(f'{kind} install failed', error)
+
+
+def diagnostic(where, error, tb=None):
+    """An error for the opt-in diagnostics level: scrubbed text, and a traceback if there is one."""
+    if not enabled('diagnostics'):
+        return
+    message = scrub(error)
+    fingerprint = f'{where}|{message[:120]}'
+    now = time.time()
+    with _lock:
+        if now - _seen_errors.get(fingerprint, 0) < REPEAT_WINDOW:
+            return
+        _seen_errors[fingerprint] = now
+    exc_type = type(error).__name__ if isinstance(error, BaseException) else 'Error'
+    frames = []
+    if tb is None and isinstance(error, BaseException):
+        tb = error.__traceback__
+    for fs in traceback.extract_tb(tb) if tb else []:
+        frames.append({'filename': os.path.basename(fs.filename), 'lineno': fs.lineno, 'function': fs.name,
+                       'in_app': True, 'platform': 'python'})
+    capture('$exception', {'$exception_list': [{'type': exc_type, 'value': message,
+                                                'mechanism': {'handled': True, 'type': 'generic'},
+                                                'stacktrace': {'type': 'raw', 'frames': frames[-30:]}}],
+                           '$exception_type': exc_type, '$exception_message': message,
+                           'where': scrub(where, 200), 'error_category': categorize(error)[0]},
+            level='diagnostics')
+
+
+COMPAT_FIELDS = ('package', 'version', 'result', 'rating', 'notes', 'via', 'date', 'steamos', 'lepton',
+                 'runtime', 'label', 'source', 'id')
+
+
+def compat_report(report):
+    """A compatibility report for the shared database (compat level only). Free text is
+    scrubbed; the source is kept only as F-Droid or a public download host."""
+    if not report.get('id') or not enabled('compat'):
+        return False
+    p = {k: report.get(k) for k in COMPAT_FIELDS if report.get(k) not in (None, '')}
+    for k, n in (('notes', 1000), ('label', 120), ('version', 80)):
+        if k in p:
+            p[k] = scrub(p[k], n)
+    src = str(p.pop('source', '') or '')
+    if src == 'F-Droid':
+        p['source'] = src
+    elif src.startswith(('http://', 'https://')) and _scrub_url(src) != '<url>':
+        p['source'] = _scrub_url(src)
+    return capture('compat_report', p, level='compat')
+
+
+def backfill_compat():
+    """On opting in, share the reports this computer kept before (not ones already sent or queued)."""
+    try:
+        import frame_compat_db
+        if frame_compat_db.shared():
+            return 0  # the maintainer's copy writes to the database directly
+        done = set(settings()['compat_sent'])
+        done |= {e['properties'].get('id') for e in _read_lines(OUTBOX) if e.get('event') == 'compat_report'}
+        n = 0
+        for r in frame_compat_db._outbox():
+            if r.get('id') not in done and compat_report(r):
+                n += 1
+        return n
+    except Exception:
+        return 0
+
+
+# ---- the outbox -----------------------------------------------------------------
+
+def _read_lines(path):
+    try:
+        with open(path) as f:
+            out = []
+            for line in f:
+                try:
+                    out.append(json.loads(line))
+                except ValueError:
+                    pass
+            return out
+    except OSError:
+        return []
+
+
+def _write_lines(path, rows):
+    STATE.mkdir(parents=True, exist_ok=True)
+    tmp = Path(str(path) + '.tmp')
+    with open(tmp, 'w') as f:
+        f.writelines(json.dumps(r, ensure_ascii=False) + '\n' for r in rows)
+    os.replace(tmp, path)
+
+
+def _drop_unwanted(s):
+    """Unsent events whose level is now off never leave the computer."""
+    keep = {level: s[level] for level in LEVELS}
+    rows = _read_lines(OUTBOX)
+    kept = [e for e in rows if keep.get(e.get('properties', {}).get('level'), False)]
+    if len(kept) != len(rows):
+        _write_lines(OUTBOX, kept)
+
+
+def post(batch, timeout=20):
+    """Send events to PostHog now. Raises SendError if they weren't accepted."""
+    cfg = config()
+    if not cfg['key']:
+        raise SendError('no PostHog project key in this build')
+    for e in batch:  # also events queued by versions that didn't add the placeholder address
+        e.setdefault('properties', {})['$ip'] = '0.0.0.0'
+    body = json.dumps({'api_key': cfg['key'], 'batch': batch}).encode()
+    req = urllib.request.Request(cfg['host'] + '/batch/', data=body, method='POST',
+                                 headers={'content-type': 'application/json',
+                                          'user-agent': f'FrameControl/{app_version()}'})
+    try:
+        with urllib.request.urlopen(req, timeout=timeout) as r:
+            r.read()
+    except urllib.error.HTTPError as e:
+        e.close()
+        raise SendError(f'PostHog said HTTP {e.code}')
+    except (urllib.error.URLError, OSError, ValueError) as e:
+        raise SendError(f"couldn't reach PostHog: {e}")
+
+
+def record_sent(events):
+    """Add events sent outside the outbox to the log the page shows."""
+    with _lock:
+        _write_lines(SENT, (_read_lines(SENT) + list(events))[-SENT_KEEP:])
+
+
+class SendError(RuntimeError):
+    pass
+
+
+def flush(timeout=20):
+    """Send what's queued. Returns how many were sent; on failure they stay queued."""
+    with _send_lock:
+        if blocked() or not settings()['notice_shown']:
+            return 0
+        with _lock:
+            _drop_unwanted(settings())
+            batch = _read_lines(OUTBOX)[:100]
+        if not batch:
+            return 0
+        try:
+            post(batch, timeout)
+        except SendError:
+            return 0
+        sent_ids = {e['uuid'] for e in batch}
+        with _lock:
+            _write_lines(OUTBOX, [e for e in _read_lines(OUTBOX) if e.get('uuid') not in sent_ids])
+            _write_lines(SENT, (_read_lines(SENT) + batch)[-SENT_KEEP:])
+            compat = [e['properties'].get('id') for e in batch if e.get('event') == 'compat_report']
+            if compat:  # remembered only once PostHog has them, so an opt-out before sending can't lose them
+                s = settings()
+                s['compat_sent'] = (s['compat_sent'] + compat)[-5000:]
+                _save(s)
+        return len(batch)
+
+
+def start():
+    """Record this start and send in the background from now on."""
+    global _flusher
+    try:
+        app_started()
+    except Exception:
+        pass
+    if _flusher:
+        return
+
+    def loop():
+        while True:
+            try:
+                while flush() == 100:  # a full batch: there may be more
+                    pass
+            except Exception:
+                pass
+            _wake.wait(FLUSH_EVERY)
+            _wake.clear()
+
+    _flusher = threading.Thread(target=loop, name='telemetry', daemon=True)
+    _flusher.start()
+
+
+def wake():
+    _wake.set()

ui/index.html

@@ -226,6 +226,17 @@
   .actions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
   .actions button { justify-content: flex-start; height: 40px; }
   .actions svg { width: 16px; height: 16px; flex: none; opacity: .85; }
+  .notice { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; padding: 12px 16px; border-radius: 4px;
+            background: rgba(26,159,255,.12); border-left: 3px solid var(--blue); font-size: 13.5px; line-height: 1.5; }
+  .notice .grow { flex: 1; min-width: 260px; }
+  .notice .progress { width: 160px; margin-top: 0; display: block; }
+  .popt { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; align-items: start; margin: 0 0 14px; cursor: pointer; }
+  .popt input { margin: 3px 0 0; width: 16px; height: 16px; accent-color: var(--blue); }
+  .popt b { font-weight: 600; color: var(--text); }
+  .popt .sub { grid-column: 2; line-height: 1.45; }
+  .sentlog { max-height: 260px; overflow: auto; background: rgba(0,0,0,.3); border-radius: 3px; padding: 10px;
+             font: 11.5px ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; word-break: break-all; margin: 8px 0 0; }
+  details summary { cursor: pointer; color: var(--link); font-size: 13px; margin-top: 12px; }
   .links { margin-top: 16px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.06); font-size: 13px; color: var(--muted); }
   .links a { color: var(--link); text-decoration: none; } .links a:hover { color: #fff; }
   .links div { margin: 5px 0; }
@@ -254,10 +265,18 @@
   .and-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 22px; align-items: start; }
   .and-col { display: grid; gap: 22px; align-content: start; }
   .rep-item .s { white-space: normal; }
-  #repDlg, #titleDlg, #wiDlg, #pwDlg, #apkAltDlg { background: #1e2329; color: var(--text); border: 1px solid rgba(255,255,255,.1); border-radius: 4px;
+  #bugDlg, #repDlg, #titleDlg, #wiDlg, #pwDlg, #apkAltDlg { background: #1e2329; color: var(--text); border: 1px solid rgba(255,255,255,.1); border-radius: 4px;
             padding: 22px; width: min(560px, 92vw); box-shadow: 0 20px 60px rgba(0,0,0,.6); }
-  #repDlg::backdrop, #titleDlg::backdrop, #wiDlg::backdrop, #pwDlg::backdrop, #apkAltDlg::backdrop { background: rgba(0,0,0,.55); }
-  #repDlg h2, #titleDlg h2, #wiDlg h2, #pwDlg h2, #apkAltDlg h2 { margin: 0 0 14px; font-size: 15px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--bright); }
+  #bugDlg::backdrop, #repDlg::backdrop, #titleDlg::backdrop, #wiDlg::backdrop, #pwDlg::backdrop, #apkAltDlg::backdrop { background: rgba(0,0,0,.55); }
+  #bugDlg { width: min(640px, calc(100vw - 40px)); }
+  #bugForm label.field { display: block; font-size: 12.5px; color: var(--muted); margin-top: 10px; }
+  #bugForm label.field input, #bugForm label.field textarea, #bugForm select { margin-top: 5px; }
+  #bugForm select { width: 100%; background: rgba(0,0,0,.28); color: var(--text); border: 1px solid transparent;
+                    border-radius: 3px; padding: 8px 10px; font: inherit; }
+  #bugForm .popt { margin: 14px 0 0; }
+  #bugForm .sentlog { max-height: 200px; }
+  #bugWarn { color: var(--muted); font-size: 12.5px; line-height: 1.45; margin: 12px 0 0; }
+  #bugDlg h2, #repDlg h2, #titleDlg h2, #wiDlg h2, #pwDlg h2, #apkAltDlg h2 { margin: 0 0 14px; font-size: 15px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--bright); }
   #repForm label, #titleForm label { display: block; font-size: 12.5px; color: var(--muted); margin-top: 10px; }
   #repForm label input[type=text], #repForm textarea, #titleForm label input, #titleForm label select { margin-top: 5px; }
   #titleForm select { width: 100%; background: rgba(0,0,0,.28); color: var(--text); border: 1px solid transparent;
@@ -383,12 +402,31 @@
   <div class="spacer"></div>
   <span class="chip" id="conn" role="status"><span class="dot"></span><span>Connecting…</span></span>
   <span class="chip" id="battChip" title="Battery">—</span>
+  <button id="reportBtn" data-report title="Report a problem, with diagnostics" aria-label="Report a problem">
+    <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" aria-hidden="true"><path d="M12 3l10 18H2z"/><path d="M12 10v5M12 18v.5"/></svg>
+  </button>
   <button id="refreshAll" title="Refresh (R)" aria-label="Refresh">
     <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" aria-hidden="true"><path d="M21 12a9 9 0 1 1-3-6.7"/><path d="M21 3v6h-6"/></svg>
   </button>
 </header>
 
 <main>
+  <div class="notice" id="updateBar" hidden>
+    <div class="grow" id="updateText"></div>
+    <div class="progress" id="updateProg" hidden><i></i></div>
+    <button class="small" id="updateNotes">What's new</button>
+    <button class="action small" id="updateGo">Update and restart</button>
+    <button class="small" id="updateLater">Later</button>
+  </div>
+  <div class="notice" id="privacyNotice" hidden>
+    <div class="grow">Frame Control sends anonymous usage statistics: that it was installed and opened, its version,
+      your operating system, which tabs you use, and whether installs on the Frame worked. Never file names, paths,
+      addresses or anything you've typed, and it isn't linked to you. You can also share whether Android apps
+      worked and the details of errors, which helps fix problems faster.</div>
+    <button class="small" id="noticeSettings">Privacy settings</button>
+    <button class="small" id="noticeMore" title="Also share compatibility results and error details (you can turn either off later)">Share more to help fix problems</button>
+    <button class="action small" id="noticeOk">OK</button>
+  </div>
   <div class="banner" id="offline" role="alert" hidden>
     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true"><path d="M2 8.5a15 15 0 0 1 20 0M5.5 12a10 10 0 0 1 13 0M9 15.5a5 5 0 0 1 6 0"/><circle cx="12" cy="19" r="1.2" fill="currentColor"/><path d="M3 3l18 18"/></svg>
     <div class="grow"><div class="t" id="offMsg">Can't reach the Frame</div>
@@ -602,6 +640,12 @@
         <span class="desk-only">You can also drop files anywhere in this window.</span>
         <input type="file" id="fileInput" multiple hidden>
       </div>
+      <label class="sub" for="apkDisplay">Android display</label>
+      <select id="apkDisplay" aria-label="Android app display mode">
+        <option value="auto">Automatic (detect VR)</option>
+        <option value="flat">Flat screen</option>
+        <option value="vr">VR app</option>
+      </select>
       <div class="progress" id="prog"><i></i></div>
       <div class="shelf-head" style="margin-top:18px"><h2>Clipboard</h2></div>
       <textarea id="clipText" placeholder="Text to put on the Frame's clipboard…"></textarea>
@@ -643,6 +687,24 @@
         <div><a href="https://framedropvr.com" target="_blank">FrameDrop</a>: sideloader (Windows only for now)</div>
       </div>
     </section>
+
+    <section class="panel" id="privacy">
+      <div class="shelf-head"><h2>Privacy &amp; updates</h2><span class="spacer"></span><span class="sub" id="appVersion"></span></div>
+      <label class="popt"><input type="checkbox" id="tUsage"><b>Anonymous usage statistics</b>
+        <span class="sub">Installs, opens, version, operating system, tabs used, and whether installs on the Frame
+          worked (with an error category, never the message). F-Droid package names only.</span></label>
+      <label class="popt"><input type="checkbox" id="tCompat"><b>Share compatibility results</b>
+        <span class="sub">Your APK reports and tests (package, version, result, your notes) go to the shared
+          compatibility database, so the verdicts get better for everyone.</span></label>
+      <label class="popt"><input type="checkbox" id="tDiag"><b>Send error details</b>
+        <span class="sub">Error messages and where in Frame Control they happened, with your home
+          folder, user name, addresses and keys removed.</span></label>
+      <div class="hint" id="tStatus"></div>
+      <details id="tSentBox"><summary>Show what's been sent</summary><div class="sentlog" id="tSent"></div></details>
+      <div class="row" style="margin-top:14px"><button class="small action" data-report>Report a problem</button>
+        <button class="small" id="updateCheck" hidden>Check for updates</button>
+        <a class="sub" href="https://github.com/saphid/frame-control/blob/main/docs/privacy.md" target="_blank">What's collected, exactly</a></div>
+    </section>
   </div>
   </div>
 </main>
@@ -696,6 +758,29 @@
       <button type="submit" class="action small" id="repSave">Save report</button></div>
   </form>
 </dialog>
+<dialog id="bugDlg" aria-labelledby="bugTitle">
+  <form method="dialog" id="bugForm">
+    <h2 id="bugTitle">Report a problem</h2>
+    <label class="field">What kind of report?<select id="bugKind">
+      <option value="bug">Something's broken</option><option value="idea">An idea</option>
+      <option value="question">A question</option><option value="other">Something else</option></select></label>
+    <label class="field">Title<input type="text" id="bugTitleIn" maxlength="120" required minlength="5"
+      placeholder="e.g. Installing an APK stops at 'copying to the Frame'"></label>
+    <label class="field">What happened?<textarea id="bugText" maxlength="5000" required minlength="10"
+      placeholder="What you did, what happened, and what you expected."></textarea></label>
+    <label class="field">How can we reach you? (optional, for a reply)<input type="text" id="bugContact" maxlength="120" placeholder="Email, GitHub or Discord name"></label>
+    <label class="popt"><input type="checkbox" id="bugDiag" checked><b>Include diagnostics</b>
+      <span class="sub">Frame Control's version, your OS and the Frame's SteamOS build.</span></label>
+    <label class="popt"><input type="checkbox" id="bugLogs"><b>Also include recent activity and the server log</b>
+      <span class="sub">Often shows what went wrong, but can contain file and app names. Check it below before sending.</span></label>
+    <details id="bugDiagBox"><summary>Show exactly what's included</summary><div class="sentlog" id="bugDiagText">Loading…</div></details>
+    <p id="bugWarn">Sent privately to the Frame Control developer. Nothing is published.</p>
+    <div class="row rep-actions"><span class="sub" id="bugMsg"></span><span class="spacer"></span>
+      <button type="button" class="small" id="bugCancel">Cancel</button>
+      <button type="button" class="small" id="bugCopy">Copy report</button>
+      <button type="submit" class="action small" id="bugSend">Send report</button></div>
+  </form>
+</dialog>
 <dialog id="titleDlg" aria-labelledby="titleTitle">
   <form method="dialog" id="titleForm">
     <h2 id="titleTitle">Add to the Steam library</h2>
@@ -1415,6 +1500,7 @@ function upload(file, mode) {
     xhr.setRequestHeader("X-Frame-UI", UI_KEY);
     xhr.setRequestHeader("X-Filename", encodeURIComponent(file.name));
     xhr.setRequestHeader("X-Mode", mode);
+    if (mode === "apk") xhr.setRequestHeader("X-APK-Display", $("apkDisplay").value);
     const bar = $("prog").firstElementChild;
     $("prog").style.display = "block"; bar.style.width = "0";
     xhr.upload.onprogress = e => { if (e.lengthComputable) bar.style.width = (100 * e.loaded / e.total) + "%"; };
@@ -1466,6 +1552,7 @@ function showApkAlternatives(reason, result) {
     if (res) $("apkAltDlg").close(); else { b.disabled = false; b.textContent = "Install"; }
     await loadAndroid();
     if (cat.apps) { const y = window.scrollY; filterCatalog(); window.scrollTo(0, y); }
+    if (res && res.app) await offerTest(res.app);
   };
   if (!$("apkAltDlg").open) $("apkAltDlg").showModal();
 }
@@ -1483,7 +1570,8 @@ async function sendFiles(files, dirs = new Set()) {
     if (!f.size) { toast(`${f.name}: empty files aren't supported`, true); continue; }
     if (TITLE_EXT.test(f.name)) { await sideload(f, path); continue; }
     const apk = f.name.toLowerCase().endsWith(".apk");
-    await act(apk ? `Install ${f.name}` : `Copy ${f.name} to ~/Downloads`, () => upload(f, apk ? "apk" : "push"));
+    const res = await act(apk ? `Install ${f.name}` : `Copy ${f.name} to ~/Downloads`, () => upload(f, apk ? "apk" : "push"));
+    if (apk && res && res.app) await offerTest(res.app);
   }
   $("fileInput").value = "";
   refresh();
@@ -1872,7 +1960,8 @@ document.body.addEventListener("click", async e => {
     toast(`Installing ${b.dataset.name}. The first time takes a minute…`);
     const done = runJob(`Install ${b.dataset.name}`, pkg, () => api("/api/android", { action, package: pkg }));
     b.outerHTML = `<span class="tag">Installing…</span>`;
-    await done;
+    const res = await done;
+    if (res && res.app) await offerTest(res.app);
   } else if (action === "remove") {
     if (!confirm(`Remove ${b.dataset.name} and its data from the Frame?`)) return;
     await act(`Remove ${b.dataset.name}`, () => api("/api/android", { action, package: pkg }), b);
@@ -2000,6 +2089,14 @@ loadDisplays();
 const RLABEL = { works: "Works", issues: "Problems", broken: "Doesn't work", runs: "Runs (test)",
                  crashes: "Crashed (test)", install_failed: "Won't install", instance_failed: "Didn't start (test)" };
 const RCLASS = { works: "works", runs: "works", issues: "maybe" };
+let repShared = false;
+function setRepHint() {
+  $("repHint").textContent = repShared
+    ? "Reports go to Frame Control's shared compatibility database and change the verdicts in the catalogue. Any APK can be reported, including ones not on F-Droid."
+    : telemetry.compat && !telemetry.blocked
+    ? "Reports change the verdicts you see and are shared with Frame Control's compatibility database (Privacy settings). Any APK can be reported, including ones not on F-Droid."
+    : "Reports are saved on this computer and change the verdicts you see. Turn on Share compatibility results in Privacy settings to add them to the shared database. Any APK can be reported, including ones not on F-Droid.";
+}
 const REPORTS_SHOWN = 5;
 let repsAll = false;
 $("repMore").onclick = () => { repsAll = true; loadReports(); };
@@ -2007,9 +2104,7 @@ async function loadReports() {
   let reps, shared;
   try { ({ reports: reps, shared } = await api("/api/android/reports")); }
   catch (e) { $("repList").innerHTML = `<div class="sub">${esc(e.message)}</div>`; return; }
-  $("repHint").textContent = shared
-    ? "Reports go to Frame Control's shared compatibility database and change the verdicts in the catalogue. Any APK can be reported, including ones not on F-Droid."
-    : "Reports are saved on this computer and change the verdicts you see. They aren't uploaded: the shared database is maintainer-only for now. Any APK can be reported, including ones not on F-Droid.";
+  repShared = shared; setRepHint();
   $("repCount").textContent = reps.length ? `${reps.length} newest` : "";
   $("repMore").hidden = reps.length <= REPORTS_SHOWN || repsAll;
   $("repMore").textContent = `Show all ${reps.length}`;
@@ -2166,7 +2261,7 @@ $("shotsFolder").onclick = e => act($("shotsFolder").textContent, () => api("/ap
 // ---- pages: #home, #games, #android, #tools (older section links still work) ----
 const PAGES = ["home", "games", "android", "tools"];
 const SECTION_PAGE = { view: "home", device: "home", shots: "home", library: "games", sideloaded: "games", getgames: "games",
-                       display: "android", transfer: "tools", apps: "tools", power: "tools" };
+                       display: "android", transfer: "tools", apps: "tools", power: "tools", privacy: "tools" };
 let page = "home";
 function showPage() {
   const id = location.hash.slice(1);
@@ -2191,6 +2286,155 @@ document.addEventListener("keydown", e => {
   if (n) location.hash = n;
 });
 
+// ---- after an APK install: test it, so the compatibility database learns whether it runs ----
+async function offerTest(m) {
+  if (!m.package || !confirm(`${m.label || m.package} is installed. Test it now?\n\nIt opens in the headset for about 20 seconds `
+                             + "and records whether it stays up.")) return;
+  toast(`Testing ${m.label || m.package}: launching it and watching for 20 s…`);
+  await act(`Test ${m.label || m.package}`, () => api("/api/android", { action: "probe", package: m.package }));
+  loadReports();
+}
+
+// ---- privacy: anonymous analytics levels (ui/frame_telemetry.py, docs/privacy.md) ----
+const telemetry = { usage: false, compat: false, blocked: "not loaded" };
+function renderTelemetry(s) {
+  Object.assign(telemetry, s);
+  setRepHint();
+  $("tUsage").checked = s.usage; $("tCompat").checked = s.compat; $("tDiag").checked = s.diagnostics;
+  $("tStatus").textContent = s.blocked ? `Nothing is being sent: ${s.blocked}.`
+    : `${s.queued ? s.queued + " waiting to send. " : ""}Your anonymous id is ${s.id.slice(0, 8)}…; it isn't linked to you or this computer.`;
+  $("tSent").textContent = s.sent.length ? s.sent.map(e => JSON.stringify({ event: e.event, time: e.timestamp, ...e.properties })).join("\n\n")
+                                         : "Nothing sent yet.";
+  const showNotice = !s.blocked && !s.noticeShown && s.usage;
+  $("privacyNotice").hidden = !showNotice;
+  if (showNotice) api("/api/telemetry", { noticeShown: true }).catch(() => {});
+}
+async function loadTelemetry() {
+  try { renderTelemetry(await api("/api/telemetry")); } catch {}
+}
+async function setTelemetry(change) {
+  try { renderTelemetry(await api("/api/telemetry", change)); }
+  catch (e) { toast(`Couldn't save: ${e.message}`, true); loadTelemetry(); }
+}
+$("tUsage").onchange = e => setTelemetry({ usage: e.target.checked });
+$("tCompat").onchange = e => setTelemetry({ compat: e.target.checked });
+$("tDiag").onchange = e => setTelemetry({ diagnostics: e.target.checked });
+$("tSentBox").ontoggle = () => { if ($("tSentBox").open) loadTelemetry(); };
+$("noticeOk").onclick = () => { $("privacyNotice").hidden = true; };
+$("noticeMore").onclick = async () => {
+  $("privacyNotice").hidden = true;
+  await setTelemetry({ compat: true, diagnostics: true });
+  toast("Thanks! Compatibility results and error details will be shared too. Change it any time in Privacy.");
+};
+$("noticeSettings").onclick = () => { $("privacyNotice").hidden = true; location.hash = "#privacy"; };
+loadTelemetry();
+function pageEvent(event, properties) {
+  if (telemetry.usage && !telemetry.blocked) api("/api/telemetry/event", { event, properties }).catch(() => {});
+}
+// Which tabs get used: once per tab per session.
+const tabsSeen = new Set();
+document.querySelectorAll("nav a").forEach(a => a.addEventListener("click", () => {
+  const tab = a.getAttribute("href").slice(1);
+  if (!tabsSeen.has(tab)) { tabsSeen.add(tab); pageEvent("tab_viewed", { tab }); }
+}));
+
+// ---- report a problem (ui/frame_report.py): sent privately to PostHog, with diagnostics ----
+const bug = { preview: "" };
+const activityLines = () => [...$("log").children].slice(0, 25).map(el => el.textContent.trim());
+function bugReportText() {
+  const contact = $("bugContact").value.trim();
+  const body = `Kind: ${$("bugKind").value}${contact ? `\nContact: ${contact}` : ""}\n\n${$("bugText").value.trim()}${bug.preview ? "\n\n---\nDiagnostics:\n```\n" + bug.preview + "\n```" : ""}`;
+  return { title: $("bugTitleIn").value.trim(), body };
+}
+// The preview is a snapshot: exactly this text is sent, even if more activity happens meanwhile.
+async function loadBugPreview() {
+  if (!$("bugDiag").checked) { bug.preview = ""; $("bugDiagText").textContent = "Nothing: diagnostics are off."; return; }
+  $("bugDiagText").textContent = "Loading…";
+  try { bug.preview = (await api("/api/report/preview", { activity: activityLines(), includeLogs: $("bugLogs").checked })).text; }
+  catch (e) { bug.preview = ""; $("bugDiagText").textContent = `Couldn't collect diagnostics: ${e.message}`; return; }
+  $("bugDiagText").textContent = bug.preview;
+}
+function openBugReport() {
+  $("bugForm").reset();
+  $("bugMsg").textContent = ""; $("bugSend").disabled = false;
+  $("bugCancel").textContent = "Cancel";
+  $("bugDiagBox").open = false; $("bugLogs").disabled = false;
+  $("bugDlg").showModal();
+  loadBugPreview();
+}
+document.body.addEventListener("click", e => { if (e.target.closest("[data-report]")) openBugReport(); });
+$("bugDiag").onchange = () => { $("bugLogs").disabled = !$("bugDiag").checked; loadBugPreview(); };
+$("bugLogs").onchange = loadBugPreview;
+$("bugCancel").onclick = () => $("bugDlg").close();
+$("bugCopy").onclick = async () => {
+  const { title, body } = bugReportText();
+  try { await navigator.clipboard.writeText(`${title}\n\n${body}`); $("bugMsg").textContent = "Copied."; }
+  catch { $("bugMsg").textContent = "Couldn't copy; select the text under Show exactly what's included."; }
+};
+$("bugForm").onsubmit = async e => {
+  e.preventDefault();
+  if (!$("bugForm").reportValidity()) return;
+  $("bugSend").disabled = true; $("bugMsg").textContent = "Sending…";
+  try {
+    const res = await api("/api/report", {
+      kind: $("bugKind").value, title: $("bugTitleIn").value, message: $("bugText").value,
+      contact: $("bugContact").value, diagnostics: $("bugDiag").checked ? bug.preview : "" });
+    $("bugMsg").textContent = `Sent, thank you. Your reference is ${res.id}.`;
+    $("bugCancel").textContent = "Close";
+    log(res.message, "ok");
+  } catch (err) {
+    $("bugMsg").textContent = `Couldn't send it: ${err.message}. Try again later, or use Copy report.`;
+    $("bugSend").disabled = false;
+  }
+};
+if (window.frameApp && window.frameApp.onReportProblem) window.frameApp.onReportProblem(openBugReport);
+
+// ---- updates (the desktop app only: app/updater.js) ----
+const upd = { dismissed: false, offered: null };
+function renderUpdate(s) {
+  if (!s) return;
+  $("appVersion").textContent = `Version ${s.current}`;
+  const r = s.latest;
+  const show = r && ["available", "downloading", "ready", "error"].includes(s.status) && !upd.dismissed
+               && !(s.status === "error" && !r);
+  $("updateBar").hidden = !show;
+  if (!show) return;
+  if (s.status === "available" && upd.offered !== r.version) { upd.offered = r.version; pageEvent("update_offered", { to_version: r.version }); }
+  const busy = s.status === "downloading" || s.status === "ready";
+  $("updateText").innerHTML = s.status === "error"
+    ? `Updating to ${esc(r.version)} didn't work: ${esc(s.error || "unknown error")}`
+    : busy ? `Downloading Frame Control ${esc(r.version)}… It restarts when it's ready.`
+    : `<b>Frame Control ${esc(r.version)} is available.</b> You have ${esc(s.current)}.`
+      + (s.canInstall ? "" : ` ${esc(s.why ? "It can't update itself here (" + s.why + ")," : "")} download it from the release page.`);
+  $("updateProg").hidden = !busy;
+  $("updateProg").firstElementChild.style.width = Math.round((s.progress || 0) * 100) + "%";
+  $("updateGo").textContent = s.canInstall ? (s.status === "error" ? "Try again" : "Update and restart") : "Open release page";
+  $("updateGo").disabled = busy; $("updateLater").hidden = busy;
+}
+if (window.frameApp && window.frameApp.update) {
+  window.frameApp.update.onState(renderUpdate);
+  window.frameApp.update.get().then(renderUpdate);
+  $("updateCheck").hidden = false;
+  $("updateCheck").onclick = async () => {
+    const btn = $("updateCheck");
+    btn.disabled = true;
+    let s;
+    try { s = await window.frameApp.update.check(); } finally { btn.disabled = false; }
+    upd.dismissed = false; renderUpdate(s);
+    if (s && s.status === "none") toast(`You have the newest version (${s.current})`);
+    if (s && s.status === "check-failed") toast(`Couldn't check for updates: ${s.error}`, true);
+  };
+  $("updateGo").onclick = () => {
+    pageEvent("update_started", { to_version: upd.offered || "" });
+    window.frameApp.update.install();
+  };
+  $("updateLater").onclick = () => { upd.dismissed = true; $("updateBar").hidden = true; };
+  $("updateNotes").onclick = async () => {
+    const s = await window.frameApp.update.get();
+    if (s && s.latest) window.open(s.latest.page, "_blank");
+  };
+}
+
 // ---- install links from websites (frame-control://install, docs/web-install.md) ----
 // The app passes each link here. The server checks it and reads the manifest;
 // nothing downloads until the user clicks Install in this dialog.

ui/server.py

@@ -43,7 +43,9 @@ import frame_android  # noqa: E402
 import frame_apk_versions  # noqa: E402
 import frame_catalog  # noqa: E402
 import frame_host  # noqa: E402
+import frame_report  # noqa: E402
 import frame_store  # noqa: E402
+import frame_telemetry  # noqa: E402
 import frame_titles  # noqa: E402
 import frame_webinstall  # noqa: E402
 
@@ -165,8 +167,10 @@ def start_job(label, work):
             fields = {"message": result.get("message") or f"{label}: done", "result": result}
         except (Failure, frame_android.FrameError) as e:
             fields = {"error": unreachable(str(e)) or str(e)}
+            frame_telemetry.diagnostic(f"job {label.split()[0]}", e)
         except Exception as e:
             fields = {"error": f"{type(e).__name__}: {e}"}
+            frame_telemetry.diagnostic(f"job {label.split()[0]}", e)
         finally:
             with _jobs_lock:
                 _jobs[job].update(fields, done=True, time=time.time())
@@ -252,7 +256,12 @@ def terminal(argv):
 # ---- actions ---------------------------------------------------------------
 
 def status(_body):
-    return json.loads(ssh("python3 -", stdin=(HERE / "frame_status.py").read_text(), timeout=20))
+    s = json.loads(ssh("python3 -", stdin=(HERE / "frame_status.py").read_text(), timeout=20))
+    osr = s.get("os") if isinstance(s, dict) else None
+    if isinstance(osr, dict):
+        frame_telemetry.frame_seen(osr.get("build"), osr.get("version"))
+        frame_report.frame.update(build=osr.get("build"), version=osr.get("version"))
+    return s
 
 
 def headset_view():
@@ -434,7 +443,16 @@ def steam(body):
         raise Failure("bad appid", 400)
     if action not in ("install", "store"):
         raise Failure("action must be install or store", 400)
+    if action == "store":
         return steam_frame(action, appid)
+    # Starts Steam's download; Steam reports the rest in the headset.
+    try:
+        res = steam_frame(action, appid)
+    except Failure as e:
+        frame_telemetry.install_finished("steam", False, error=e, steam_appid=appid)
+        raise
+    frame_telemetry.install_finished("steam", True, steam_appid=appid)
+    return res
 
 
 def steam_search(query):
@@ -508,10 +526,16 @@ def flatpak(body):
         raise Failure("bad Flatpak app ID", 400)
     if action == "install":
         def work():
+            start = time.time()
+            try:
                 # Per-user, so it survives SteamOS updates and needs no sudo (as install-apps.sh).
                 ssh("flatpak remote-add --user --if-not-exists flathub "
                     "https://dl.flathub.org/repo/flathub.flatpakrepo && "
                     f"flatpak install --user -y --noninteractive flathub {shlex.quote(app)}", timeout=1800)
+            except Failure as e:
+                frame_telemetry.install_finished("flatpak", False, time.time() - start, e, flatpak_id=app)
+                raise
+            frame_telemetry.install_finished("flatpak", True, time.time() - start, flatpak_id=app)
             return {"message": f"Installed {app}"}
         return start_job(f"Install {app}", work)
     if action == "uninstall":
@@ -608,13 +632,37 @@ def android(body):
                                          runtime=body.get("runtime") or "instance",
                                          label=body.get("label"), source=body.get("source"))
             name = r.get("label") or pkg
-            where = "" if frame_catalog.compat_db.shared() else " on this computer"
+            where = ("" if frame_catalog.compat_db.shared() else
+                     " and shared it" if frame_telemetry.enabled("compat") else " on this computer")
             return {"message": f"Saved your report for {name}{where}", "report": r}
     except frame_android.FrameError as e:
         raise Failure(str(e))
     raise Failure("unknown action", 400)
 
 
+# Errors that are the APK's own fault, so they belong in the compatibility
+# database as install_failed. Connection trouble and the like don't.
+APK_FAULTS = {"android_installer", "apk_needs_newer_android", "apk_wrong_abi"}
+
+
+def apk_installed(info, meta, error, seconds):
+    """Every APK install (catalogue, dropped file, web link): usage analytics, and an
+    install_failed report when the APK itself wouldn't install."""
+    pkg = (info or {}).get("package")
+    by_pkg = frame_catalog._cache.get("by_pkg") or {}
+    in_catalog = bool(pkg) and pkg in by_pkg
+    # Package names only for catalogue apps, which are public; a private APK's name stays here.
+    # No version: a local rebuild can share a catalogue app's package name but carry anything in its version.
+    frame_telemetry.install_finished("apk", error is None, seconds, error, catalog=in_catalog,
+                                     package=pkg if in_catalog else None)
+    if error is not None and pkg and frame_telemetry.categorize(error)[0] in APK_FAULTS:
+        frame_catalog.add_report(pkg, info.get("version"), result="install_failed", notes=str(error)[:300],
+                                 via="install", label=info.get("label"))
+
+
+frame_android.install_hooks.append(apk_installed)
+
+
 # ---- Sideloaded titles (Linux/Windows builds as Steam Devkit Games) --------
 #
 # Installing is two steps: inspect (a dropped file is uploaded and a zip
@@ -668,14 +716,18 @@ def _run_title_install(token, entry, name, exe, runtime):
         with _titles_lock:
             _title_jobs[token].update(fields)
 
+    start = time.time()
     try:
         m = frame_titles.install_plan(entry["plan"], name=name, exe=exe, runtime=runtime,
                                       progress=lambda stage, fraction: update(stage=stage, fraction=fraction))
         update(title=m, message=f"Installed {m['id']} in the Steam library ({m['runtime_label']})")
+        frame_telemetry.install_finished("title", True, time.time() - start, runtime=m.get("runtime"))
     except frame_android.FrameError as e:
         update(error=str(e))
+        frame_telemetry.install_finished("title", False, time.time() - start, e)
     except Exception as e:
         update(error=f"{type(e).__name__}: {e}")
+        frame_telemetry.install_finished("title", False, time.time() - start, e)
     finally:
         _drop_staged(entry)
         update(done=True, time=time.time())
@@ -1128,10 +1180,16 @@ def _webinstall_run(plan, job):
         ensure_master()
         res = frame_webinstall.dispatch(path, name=plan["name"], exe=plan["exe"], progress=detail, source=plan["url"])
         job["message"], job["phase"] = res["message"], "done"
+        if res.get("kind") != "apk":  # APKs are counted by apk_installed
+            frame_telemetry.install_finished("web", True, kind_detail=res.get("kind"))
     except Exception as e:
+        stage = job.get("phase")  # download or install, before it becomes "error"
         known = (frame_webinstall.WebInstallError, Failure, frame_android.FrameError)
         job["error"] = str(e) if isinstance(e, known) else f"{type(e).__name__}: {e}"
         job["phase"] = "error"
+        # An APK that failed to install was counted by apk_installed.
+        if not isinstance(e, frame_webinstall.Cancelled) and not (stage == "install" and plan.get("kind") == "apk"):
+            frame_telemetry.install_finished("web", False, error=e, stage=stage, kind_detail=plan.get("kind"))
     finally:
         with _web_lock:
             job.pop("_conn", None)
@@ -1230,6 +1288,20 @@ def _sweep_one(prefix, d):
         pass
 
 
+# ---- Report a problem (frame_report.py) --------------------------------------
+
+def report_preview(body):
+    """Exactly the diagnostics a report would include, for the dialog to show first."""
+    return {"text": frame_report.diagnostics(body.get("activity") or (), include_logs=bool(body.get("includeLogs")))}
+
+
+def report_send(body):
+    try:
+        return frame_report.send(body)
+    except frame_report.ReportError as e:
+        raise Failure(str(e))
+
+
 def agent_call(body):
     return frame_agent.call(sys.modules[__name__], body)
 
@@ -1246,11 +1318,19 @@ POST = {"/api/agent/call": agent_call, "/api/agent/approval": agent_approval,
         "/api/assistant/chat": assistant_chat, "/api/android/display": android_display, "/api/android": android, "/api/titles": titles, "/api/launch": launch, "/api/steam": steam, "/api/volume": set_volume, "/api/clipboard": clipboard,
         "/api/flatpak": flatpak, "/api/open": open_thing, "/api/shots/save": save_shots,
         "/api/webinstall/check": webinstall_check, "/api/webinstall/start": webinstall_start,
-        "/api/webinstall/cancel": webinstall_cancel}
+        "/api/webinstall/cancel": webinstall_cancel,
+        "/api/telemetry": frame_telemetry.update_settings, "/api/telemetry/event": frame_telemetry.page_event,
+        "/api/report/preview": report_preview, "/api/report": report_send}
 
 
 # ---- HTTP ------------------------------------------------------------------
 
+def action_of(body):
+    """The action a request asked for, for diagnostics: a short word, never user data."""
+    a = body.get("action") if isinstance(body, dict) else None
+    return a if isinstance(a, str) and re.fullmatch(r"[a-z]{1,20}", a) else ""
+
+
 def _pipe_reader(pipe):
     """Chunks from a pipe via a thread; select() can't wait on pipes on Windows."""
     chunks = queue.Queue()  # unbounded: the pump never blocks, so it ends at EOF
@@ -1376,6 +1456,8 @@ class Handler(BaseHTTPRequestHandler):
                                 "shared": frame_catalog.compat_db.shared()})
             elif path == "/api/android/catalog":
                 self.send_json({"apps": frame_catalog.catalog()})
+            elif path == "/api/telemetry":
+                self.send_json(frame_telemetry.state())
             elif path == "/api/computer/state":
                 self.send_json(json.loads(ssh("python3 -", stdin=(HERE / "frame_computer.py").read_text(), timeout=20)))
             elif path == "/api/status":
@@ -1406,12 +1488,14 @@ class Handler(BaseHTTPRequestHandler):
         except frame_android.FrameError as e:
             self.send_error_json(str(e), 502)
         except Exception as e:
+            frame_telemetry.diagnostic(f"GET {path}", e)
             self.send_json({"error": f"{type(e).__name__}: {e}"}, 500)
 
     def do_POST(self):
         if not self.local_request():
             return
         path = urlparse(self.path).path
+        body = None
         try:
             if path == "/api/upload":
                 self.send_json(self.upload())
@@ -1428,12 +1512,16 @@ class Handler(BaseHTTPRequestHandler):
                 raise Failure("request body must be a JSON object", 400)
             self.send_json(handler(body))
         except Failure as e:
+            if e.status >= 500:
+                frame_telemetry.diagnostic(f"POST {path} {action_of(body)}", e)
             self.send_error_json(str(e), e.status, e.apk)
         except (ValueError, TypeError) as e:
             self.send_json({"error": f"bad request: {e}"}, 400)
         except frame_android.FrameError as e:
+            frame_telemetry.diagnostic(f"POST {path} {action_of(body)}", e)
             self.send_error_json(str(e), 502)
         except Exception as e:
+            frame_telemetry.diagnostic(f"POST {path} {action_of(body)}", e)
             self.send_json({"error": f"{type(e).__name__}: {e}"}, 500)
 
     def stream_video(self, query):
@@ -1533,20 +1621,31 @@ class Handler(BaseHTTPRequestHandler):
                 keep = True  # stage_title owns tmp now, and removes it on failure
                 return stage_title(str(dest), temp_dir=str(tmp))
             if mode == "apk":
+                # Checked here, before install(), to hand the page a blocker it can offer
+                # alternatives for; report these failures the way install() would have.
+                start = time.time()
                 try:
                     info = frame_android.apk_info(str(dest))
                 except frame_android.FrameError as e:
+                    frame_android._after_install(None, None, e, start)
                     raise Failure(str(e), 400)
                 try:
                     frame_android.check_installable(info)
                 except frame_android.FrameError as e:
+                    frame_android._after_install(info, None, e, start)
                     raise Failure(str(e), 400, {"package": info["package"], "version_code": info.get("version_code"), "blocker": str(e)})
                 ensure_master()
                 try:
-                    m = frame_android.install(str(dest), source=name)
+                    display = self.headers.get("X-APK-Display", "auto")
+                    if display not in ("auto", "flat", "vr"):
+                        raise frame_android.FrameError("invalid APK display mode")
+                    m = frame_android.install(str(dest), source=name,
+                                              flatscreen=None if display == "auto" else display == "flat")
                 except frame_android.FrameError as e:
                     raise Failure(str(e), 400)
-                return {"message": f"Installed {m['label']} as its own app in the Steam library", "app": m}
+                kind = "VR app" if not m['flatscreen'] else "app"
+                notes = " ".join(m.get("vr_issues", []))
+                return {"message": f"Installed {m['label']} as its own {kind} in the Steam library. {notes}".strip(), "app": m}
             return {"message": push_file(dest)}
         finally:
             if not keep:
@@ -1571,6 +1670,7 @@ def main():
     args = ap.parse_args()
     httpd = LoopbackServer(("127.0.0.1", args.port), Handler)
     sweep_tmp()
+    frame_telemetry.start()
     if not frame_host.WINDOWS:
         signal.signal(signal.SIGTERM, lambda *_: (_ for _ in ()).throw(KeyboardInterrupt))
     if args.exit_on_eof:

ui/telemetry.json

@@ -0,0 +1,5 @@
+{
+  "host": "https://us.i.posthog.com",
+  "key": "phc_qkmbgQBvl2oBXGUVzfV6gG52EpmJdeaQyaRIxHRoQoL",
+  "project": "343535"
+}