docs(skills): add management-API testing recipe skill

[devin-ai-integration]

Summary

• Adds .agents/skills/testing-opencodex-management-api/SKILL.md — test-recipe knowledge for the management API: isolating client homes in test setup and documenting residual macOS write paths.
• Supersedes Add testing skill for the OpenCodex management API #616, which is stuck in draft: the review gate's re-attestation after a post-ready push requires an edited event from the PR author with sender type "User", which a bot-authored PR can never produce.

Verification

• Documentation-only change; no code paths affected.

Checklist

• Scope stays focused and avoids unrelated cleanup.
• Docs or release notes were updated when needed.
• Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults.

Link to Devin session: https://app.devin.ai/sessions/18173a51bcf04824a2e66ca1d2e42ccf
Open in Devin Desktop: https://app.devin.ai/desktop/session/18173a51bcf04824a2e66ca1d2e42ccf?variant=devin
Requested by: @luvs01

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[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

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[github-actions]

✅ Deterministic PR hygiene checks passed.

[github-actions]

✅ READY

• all PR quality gates passed; the review readiness checklist is complete.

Review readiness checklist

• ✅ Required local validation passed; commands, results, and any full-suite exception are documented.
• ✅ I pushed my PR to a recent dev commit (at most 10 behind; a maintainer may still ask for the exact tip before merge).
• ✅ I resolved all correct Codex and CodeRabbit findings.
• ✅ My PR is ready for review.

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Maintainers: @lidge-jun @Ingwannu

[devin-ai-integration]

Fixed in 21ab49c3c. Confirmed refreshOwnedRaycastCatalog runs unconditionally at startup and raycastAiDir resolves ~/.config/raycast/ai under the OS home on both macOS and Windows — the caveat now says "macOS AND Windows" and limits the zshrc note to platforms where a zshrc exists.

[devin-ai-integration]

Fixed in 21ab49c3c. Verified enqueueManualLabRun returns {run, trigger} and that claimNextRun returning null (shutdown, pre-claim abort, claim miss) leaves the record queued — the doc now states run is the post-dispatch record, normally terminal but possibly still queued/cancelled.

[devin-ai-integration]

Fixed in 21ab49c3c. Confirmed the PUT handler reads loadLabAutomationConfig before saveLabAutomationConfig — the doc now says publication is one atomic rename while the read-merge is not under the save lock, so concurrent PUTs can lose one update.

[luvs01]

이관됨: lidge-jun#6051

[luvs01]

동일 수정이 상류 저장소에 제출되어 이 포크 PR의 목적은 달성됐습니다.