forked from unom/punktfunk
enricobuehlerandClaude Fable 5
1d31e4c565
Round-1 on-glass falsified two v1 assumptions in one morning (NP3 ↔ .173): - A median lead is immovable under period-spanning jitter (uniform mod P), so v1 orbited the period at 2 ms/s forever — and the dead-signal freeze hotfix never armed, because ±1.5 ms of window sampling noise kept resetting its 'error responded' check. Thresholds can't referee noise. - A HELD hold is not free: it delays sampling after the capture stamp, taxing e2e by up to a period (user-measured: ~+4 ms during the orbit). The correct failure response is DECAY TO ZERO, never freeze-in-place. v2, all three layers: - Wire: PhaseReport grows a length-discriminated coherence tail (27-byte form; the u16::MAX sentinel encodes as the byte-identical 25-byte v1 — strict-prefix discipline, both forms pinned by tests). - Client: the reporter sends the CIRCULAR vector-mean latch phase mod the panel period + its coherence (‰); pf.present logs circ=/coh=. - Host: steps only while coherent (floor 300‰; a v1 report bypasses the gate), along the signed SHORTEST way around the period, under a cumulative 1.25-period travel budget that is noise-immune by construction (it integrates applied steps, not reported errors); incoherence or budget exhaustion decays the hold to zero and re-arms once flat. Deadband convergence resets the budget — tight regimes lock exactly as designed. report_phase + the C ABI mirror gain the coherence parameter (canary-only ABI, hours old, sole caller in-tree). Gates: docker amd64 clippy --all-targets -D warnings (host+core, nvenc) clean; core suite 244/244; cargo ndk arm64 check clean. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>