[kixelated]

Problem

moq-dev/studio#118 merged before two CodeRabbit threads were folded into the quest, so the implementer of quest/m0/playout-positioned.md would not see them:

• r4507509656: trimming only already-mixed samples leaves an overlap with queued audio, and Positioned::write then rejects the whole frame.
• r4507509661: a one-millisecond CONTIGUOUS snap would close a genuine sub-millisecond gap.

Approach

Adds both to the quest's "Recommendations, not settled" list. The settled decisions are unchanged.

• The writer trims against the later of the already-mixed position and the previous write's end, so an overlapping frame writes its playable tail.
• CONTIGUOUS snaps only to absorb stamp rounding. The implementer confirms the source's stamp resolution and shrinks the tolerance to it if that is tighter.

Impact

Quest docs only. No public API or wire impact.

Alternatives

• Settle both as decisions: rejected, since the tolerance depends on stamp resolution the implementer has yet to confirm.

Follow-ups

None.

Models

• Size: XS
• Implementer: Claude Code, Claude Opus 5.5, high effort

Review

Rewritten by quest review after each round.

• Reviewer: Codex, gpt-6.1-sol, low effort
• Session: 01a1bcbf-9c76-7f32-af72-1e16e4206b76, round 1
• Head: 6afc32a
• Base: origin/main at f9414b3
• Score: 10/10, This narrowly scoped change only clarifies quest-plan recommendations and introduces no executable behavior or actionable defects.
• Findings: none

🤖 Generated with Claude Code

(Written by Claude Opus 5.5 with high effort)

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  ^{｜ Review this ➔}

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• Run ID: 30bea470-c14f-4ab6-84f7-f78bbc81965f

Commits

Reviewing files that changed from the base of the PR and between f9414b3 and 6afc32a.

Files selected for processing: 1

• quest/m0/playout-positioned.md

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[kixelated]

Automated review by review (OpenAI)

Reviewed head: 6afc32a43b8b35351fc10aa97522d97050a13b00
Base: f9414b34c05ce9f490d2dc8d935636556eb81809

No actionable findings in this documentation-only follow-up.

The additions at quest/m0/playout-positioned.md:42–50 capture both intended constraints: trim against queued audio as well as the mixed position, and preserve genuine gaps rather than blindly applying a one-millisecond snap. These agree with upstream Positioned::write, which rejects an overlapping write in full and fills positive gaps with silence. Keeping source-resolution confirmation as a recommendation is appropriate for this plan; the settled clock mapping and late-trimming decisions remain unchanged.

Direction: keep this focused plan update and the separate upstream-pin prerequisite. The implementation should prove queued-overlap trimming and genuine-gap preservation through the existing driver-stepped bus tests.

Verification limits: read the full plan, its prerequisite, current playout implementation, relevant upstream positioned-write code/tests, cited review threads and history through GitHub. I did not run quest context, builds, tests or audio playback. Check run 771 was still in progress when inspected.