- Plugged into the Mac, the Frame is a USB network device ("Steam Frame",
usb0 at ~0.9 ms). The tunnel uses it when the Frame's usb0 answers,
with the usual host key; otherwise the normal path. Interleaved runs:
content p50 7 vs 10 ms, click to drawn 17 vs 27 ms, scroll p95 23 vs
31-37 ms. FRAME_MACVIEW_USB=0 turns it off; the card says "over USB-C".
- Bench: --usb, and the route is recorded per run.
- Docs: Steam's own streaming (no SteamVR host on macOS; Remote Play pairs
but streams games, not windows; test blocked); the Frame's USB network;
the 2026-09-28 health-check boot-loop recurrence.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Review round 8 (GPT-6 Astra xhigh): --delay paused upstream reads, so busy
streams saw 30-60 ms instead of 30. Verified locally: 60-62 ms round trip
with 30 ms each way under load. No saved result used --delay.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
- Per-frame timing on the Mac's clock (capture, encode, network, decode,
draw), viewer clock sync and reports, input echo, /stats and a HUD.
- scripts/macview-bench.py: repeatable runs on the real Frame, a shaping
relay (no sudo), interleaved A/B between agent settings; results in
bench/results/.
- Adaptive controller: ack-based send gate with jitter-aware slack, AIMD
bitrate that knows when a stream is app-limited, fps then size tiers.
On a 50->3->50 Mbit/s step, scroll p95 went from 4.7 s to 72 ms; no cost
on a clean link.
- Separate mode: real AppKit event loop (HiDPI and NSScreen now work),
cropped capture for fixed-size windows, windows kept on their display,
graceful quit restores windows; stop/start races fixed.
- Encoder timeline clamp (no oversized frame after a pause).
- Frame Control shows each live stream's fps, delay, bitrate and tier.
Reviewed by GPT-6 Astra xhigh (read-only), 7 rounds; findings fixed.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
