[kixelated]

Claims quest/m2/latency-ledger.md.

Summary

No code yet. Starting this showed that every part of the work depends on a stats-format or public-API choice the Plan leaves open, and on reporters that have not landed. This PR holds the claim until those are settled.

What exists today:

• hang::echo::Rendition (rs/hang/src/echo.rs) and Echo.RenditionSchema (js/hang/src/echo.ts) have a scalar latency gauge, "latest playout latency". No producer fills it in either language. The schema is unreleased (not on release), so reshaping it is free.
• The harness no longer patches the player. test/audio-quality/clients/js/src/probe.ts reads public signals: jitter_buffer comes from sync.out.delay, and device from AudioContext.outputLatency + baseLatency. Natively, moq play --metrics writes the presentation target and Observation::latency. decode, render, and the publisher stages are reported as unmeasured.
• No player publishes a feedback snapshot yet. The browser reporter is the draft moq-dev/moq#7222, which adds a Tally in js/watch/src/feedback.ts. moq play --echo has not been started (quest/m2/stats/rust.md; moq-dev/moq#7091 covers capture only).

Decisions

Settled by the maintainer on 2026-10-30, and recorded in the quest's Plan by moq-dev/moq#7417:

1. Sequencing.
   • ✅ (a) Add Browser reporters (draft moq-dev/moq#7222) and Rust reporters to Required, and release this claim.
   • (b) Go ahead now.
2. Wire shape.
   • ✅ (a) latency: { jitterBuffer?, decode?, render?, device? }, with each stage in integer ms and absent when unmeasured.
   • (b) A total plus stages.
   • (c) Flat gauges.
3. Which stages get exported.
   • ✅ Only jitterBuffer and device, with the Goal narrowed to match.
4. rs/hang/src/stats.rs.
   • ✅ Leave it alone.

Decisions needed

1. Release this claim. Once moq-dev/moq#7417 merges, the quest is blocked on both reporters, so this PR has nothing to land. Options:

   • (a) Release it with quest start --release quest/m2/latency-ledger.md (recommended).
   • (b) Close it.

   This agent did neither: closing is the maintainer's call.

Impact

None yet. This PR changes no code, API, or wire format.

Review

Skipped: no code changes to review.

(Written by Claude Opus 5.5)

🤖 Generated with Claude Code

[kixelated]

Released this claim with quest start --release quest/m2/latency-ledger.md, as the maintainer decided on 2026-10-30. The decisions are recorded in moq-dev/moq#7417, which is queued to land. The quest is now blocked on the browser and Rust feedback reporters. Releasing a claim deletes its empty claim branch, so GitHub closed this draft along with it; no work was lost. Once the reporters merge, quest start will claim the quest again.

(Written by Claude Opus 5.5)