The controller learns stillness from the host, and motion stops reading as congestion #407

Merged

enricobuehler merged 3 commits from worktree-abr-phase3 into main

2026-08-27 09:22:24 +00:00

Author	SHA1	Message	Date
enricobuehler	cba7587684	chore(ci): baseline the two new wire constants — protocol internals, not knobs apple / swift (pull_request) Successful in 2m13s Details apple / distribute (pull_request) Skipped Details apple / screenshots (pull_request) Skipped Details android / android (pull_request) Successful in 5m57s Details windows-client / client (arm64, --no-default-features, aarch64-pc-windows-msvc, C:\t-a64) (pull_request) Successful in 3m1s Details windows-client / client (x64, , x86_64-pc-windows-msvc, C:\t) (pull_request) Successful in 6m18s Details ci / bun-nix (pull_request) Successful in 20s Details ci / docs-drift (pull_request) Successful in 23s Details ci / docs-site (pull_request) Successful in 1m44s Details ci / web (pull_request) Successful in 1m52s Details ci / rust-arm64 (pull_request) Successful in 2m34s Details ci / rust (pull_request) Successful in 7m24s Details	2026-08-27 11:03:08 +02:00
enricobuehler	2b107f5a18	chore(core): prefix the two new exported constants in the C header (R21) ci / bun-nix (pull_request) Successful in 39s Details ci / docs-drift (pull_request) Failing after 36s Details ci / docs-site (pull_request) Successful in 1m2s Details ci / web (pull_request) Successful in 1m16s Details apple / swift (pull_request) Successful in 2m9s Details apple / distribute (pull_request) Skipped Details apple / screenshots (pull_request) Skipped Details ci / rust-arm64 (pull_request) Successful in 2m49s Details android / android (pull_request) Successful in 6m6s Details windows-client / client (x64, , x86_64-pc-windows-msvc, C:\t) (pull_request) Successful in 6m16s Details windows-client / client (arm64, --no-default-features, aarch64-pc-windows-msvc, C:\t-a64) (pull_request) Successful in 2m44s Details ci / rust (pull_request) Successful in 15m42s Details	2026-08-27 10:42:00 +02:00
enricobuehler	a387ddd4ab	The controller learns stillness from the host, and motion stops reading as congestion (ABR overhaul Phase 3) Static content used to poison the client's ABR against the first moment of motion (the 2026-08-26 field chain, step 5), and a frame-driven source could never climb at all (the documented dead band). Four changes, per the signed-off RFC §4.1–4.3 + §7 Q4: - The host marks idle-keepalive re-encodes on the wire (USER_FLAG_REPEAT; whole-frame and streamed paths) and says so in a new trailing Welcome byte (host_caps2 / HOST_CAP2_REPEAT_MARK — the second capability byte the 0x80 wall predicted, same append discipline, placeholder chain extended one link). Old clients ignore both; against an old host the client keeps every legacy rule. - Idle windows (every AU a repeat) are NEUTRAL: they train no OWD/ decode/encode baselines, accrue no climb credit or re-probe authority, and never authorize a climb — loss/flush/drop keep their full power. The pinned climb-gate test is extended, not deleted. - Utilization is measured per frame at the source's own rate: a 35 fps menu on a 90 Hz config climbs when its frames run full. The proven-headroom cap prorates with it — it bounds the next target's projected WIRE rate at ×1.5 over what was delivered — or the two gates would deadlock exactly where the fix is needed. - Recovery is bounded and multiplicative: the proven mark is a two-bucket windowed max (~30–60 s) instead of all-session, and the first active window after ≥3 s of stillness re-arms slow start with the cooldown cleared — the ~103 s additive crawl from the floor becomes seconds, never past ×1.5 over recently-proven delivery. - FLOOR_KBPS drops 5000 → 2000 (RFC §7 Q4), with a one-shot log warning on the first descent below the old fence; the client-settings doc says so. punktfunk-core --features quic: all 500 lib tests green natively, including six new field-shaped scenarios (frame-driven climb, idle neutrality head-to-head vs a legacy host, bounded onset re-arm, windowed proven decay, floor + warning, idle-never-climbs).	2026-08-27 10:40:48 +02:00