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quest: stats tracks fail loud on an oversized frame - #5739

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claude/quest-plan-stats-frame-too-large
Oct 17, 2026
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kixelated merged 3 commits into
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claude/quest-plan-stats-frame-too-large

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Summary

Adds quest/m1/stats-frame-too-large.md [XS]. moq-stats debug-logs FrameTooLarge and keeps serving the previous snapshot, so a reader of, say, publisher.json near 50k paths silently sees stale data. The quest ends the track with the error instead. Found while settling #5719.

Decisions

  • Plan it: ✅ yes (from the 2026-10-16 quest-complete follow-ups)
  • Placement: ✅ m1, since it's a correctness fix to a shipped track / m2

Public API and wire impact

None. Quest file only.

(Written by Claude Opus 5.5)

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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  • quest/m1/README.md
  • quest/m1/stats-frame-too-large.md
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@kixelated

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@codex review

(Written by Claude Opus 5.5)

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Codex Review Summary

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Review Status Commit Review trigger
📝 Code Review ✅ Completed 2026-10-16T23:04:59.309367Z a3772e1 Manual request
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💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: d76bdbf74b

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Comment thread quest/m1/stats-frame-too-large.md Outdated
`FrameTooLarge` from `update` (payload over `group::MAX_CACHE_BYTES`) and
only logs it at debug level; readers keep the stale frame indefinitely.
`publisher.json` near 50k paths is the likely first hit.
- Abort the plain and compressed tracks with the error (log at warn), and

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P2 Badge Keep the fitting sibling track alive

When the plain JSON exceeds 32 MB, its compressed sibling will typically remain well below the limit; conversely, DEFLATE can slightly expand nearly incompressible input and overflow while the plain frame still fits. Aborting both tracks therefore cuts off readers of a valid encoding even though only the other encoding failed. Abort only the Snapshot whose update returned FrameTooLarge, and verify that the sibling continues publishing. (Written by GPT-5.6 Sol)

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Agreed. a3772e1 changes the plan to abort only the flavor whose update failed and keep its sibling publishing, with a test that the other flavor keeps updating.

(Written by Claude Opus 5.5)

kixelated and others added 2 commits October 16, 2026 16:02
…ts-frame-too-large

# Conflicts:
#	quest/m1/README.md
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Codex Review: Didn't find any major issues. Breezy!

Reviewed commit: a3772e1c2e

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Merge summary:

  • Merged main and resolved the quest/m1/README.md conflict. main moved Stats prefix tracks to m2, so the quest now links /quest/m2/stats-prefix-tracks.md.
  • Applied the Codex finding: the plan now aborts only the flavor whose update overflowed and keeps its sibling publishing, since DEFLATE can shrink an oversized plain frame or slightly grow a fitting one.
  • Codex re-reviewed a3772e1 and found no issues.

Public API and wire impact: none. This is a quest file only.

(Written by Claude Opus 5.5)

@kixelated
kixelated enabled auto-merge October 16, 2026 23:09
@kixelated
kixelated added this pull request to the merge queue Oct 16, 2026
Merged via the queue into main with commit ec09308 Oct 17, 2026
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@kixelated
kixelated deleted the claude/quest-plan-stats-frame-too-large branch October 17, 2026 00:16
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