AntFleet

Disagreement · 44bd7a66-openai-1

Session save uses a single fixed temp filename causing race/lost-update risk across concurrent saves

solo GPT-5
repo 56f59a0d·PR #1·reviewed 4 days ago

GPT-5 finding

Session save uses a single fixed temp filename causing race/lost-update risk across concurrent saves

mediumconcurrencyhigh
  • src/session.ts:14-15
  • src/session.ts:46-49
All writers use the same temp path (latest.tmp). Concurrent calls (from multiple processes or threads) can overwrite each other's temp file and final rename, leading to lost updates or leaving a stray latest.tmp if a crash occurs between write and rename.

Recommendation

Use a unique tmp filename per save (e.g., latest.<pid>.<timestamp>.<random>.tmp) and then rename to latest.json. Optionally fsync the directory after rename for stronger durability and clean up any stale tmp files on startup.

Other reviewer

The other reviewer flagged nothing in this file/line range.

Why this didn't post

This finding didn't meet AntFleet's unanimous agreement threshold. Both frontier models review every PR independently; only findings they both flag with the same severity and category are posted to the PR. This one fell through.

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From the same review

These findings passed the unanimous gate on the same PR review. The disagreement above was filtered out; the findings below were posted.

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