[kixelated]

Works on quest/m1/bun-efault.md. Posts the Bun EFAULT report upstream, as the user approved on 2026-10-28, and records it in the quest. The quest stays open, waiting on a Bun release.

Posted upstream

Comment on oven-sh/bun#48811, instead of a new issue, as the Plan asked. The issue, filed 2026-11-13, reports this exact bug (non-recursive rm, EFAULT on Windows when deleters race) but its reporter never ran the repro. The comment adds:

• the Windows runs from #233's diagnostics on Bun 1.4.2: EFAULT on windows-2022 and windows-11-arm, with counts, and Node's EPERM on arm,
• that rmSync hits it too, and that one remover alone never fails,
• a repro trimmed from the diagnostic script (full script linked at its commit).

I checked oven-sh/bun's CONTRIBUTING.md, AGENTS.md, CLAUDE.md, issue templates, and .github and found no rule on AI-written issues or comments. It carries the (Written by Claude Sonnet 5.5) line this repository requires. Nothing else was posted on oven-sh/bun.

Quest changes

• Goal now states the outcome (Bun no longer throws EFAULT) instead of "a report exists".
• Plan records the comment's URL, and names oven-sh/bun#48816 (open, by robobun) as the fix to wait for: it makes non-recursive rm report the errno unlink returned, so the loser gets EPERM as in Node, which remove() already tolerates. oven-sh/bun#38550 is noted as closed unmerged on 2026-11-13; #39708 and #39710 (recursive case) stay as related.
• Waiting now points at #48811 and #48816.

Public API and wire: none.

Models

Size: XS
Implementer: Claude Code, claude-sonnet-5-5, unknown effort (arm A)

Choices made without asking

• Commented on #48811 rather than opening an issue: it matches exactly, and a duplicate would split the discussion. The comment is the "report" the quest's Goal required.
• Did not comment on #48816, the fix PR: one post only.
• The posted repro is trimmed from the diagnostic and has only run on Linux (no errors there, as expected), not on Windows. The comment says so; the counts come from the full diagnostic's CI run.
• Kept the quest open with an updated Waiting item rather than deleting it: remove() in src/cli/gate.ts still needs EFAULT until a release and a pin bump.

Validation

• just check and just test pass locally; quest check --base origin/main passes.
• Ran the trimmed repro under Bun 1.4.4 and Node on Linux: no errors, so it runs. The Windows behavior is from the diagnostic run (Bun 1.4.2, both runners); I have no Windows host.
• Checked the posted counts against that run's logs, and the comment URL resolves.

Review

Rewritten by quest review after each round.

• Head: 1ff060f

• Base: origin/main at f46721b

• Risk: low, Only a plan under quest/ changes, so no behavior users or other repositories rely on can break, and a revert fully undoes the documentation update.

• Classified: low by Codex, gpt-6.1-sol, low effort, session 01a1db9a-f339-7f22-a571-98c2951ded1e

• Reviewer: Codex, gpt-6.1-sol, medium effort

• Session: 01a1db9b-0681-78e2-8908-9d59b772a377, round 1

• Score: 10/10, The diff only updates the quest's upstream tracking, preserves the release-and-pin prerequisite for removing the workaround, and has no actionable defects.

• Rounds: 1; first round 0; findings 0: fixed 0, refuted 0, open 0

• Findings: none

• Reviewer: Codex, gpt-6.1-sol, low effort, shadow

• Session: 01a1db9b-0682-7903-bc8a-460d96a9a071, round 1

• Score: 10/10, The documentation-only update preserves the release-and-pin prerequisite for removing the workaround and has no actionable defects.

• Rounds: 1; first round 0; findings 0: fixed 0, refuted 0, open 0

• Findings: none

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• quest/m1/bun-efault.md

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[pullfrog]

✅ No new issues found.

Reviewed changes: the single-file quest plan update.

• Goal now states the outcome (Bun no longer throws EFAULT) and keeps the release-and-pin condition for removing the remove() workaround.
• Plan records the upstream comment on oven-sh/bun#48811 and names #48816 as the fix to wait for. It notes that EPERM is already tolerated, so only the EFAULT entry goes.
• Waiting points at #48811 and #48816.

  ^{｜ View workflow run ｜ Using claude-sonnet-5-5 ｜ 𝕏}