[tlq5l]

Fixes #182. With --reinvestigate or a file list (--diff, --files, --files-from), process claimed files another live run was still investigating, and the last run to finish overwrote the other's findings and analysisHistory. In those modes the claim step now skips a file while another run's lock on it isn't reclaimable: its run is done, errored, or missing, its PID is dead on this host, or the lock is older than 1 hour.

• Skipped files get one warning that counts them and names up to five, in every mode. --limit counts claimed files, so locked ones don't use up slots. The exit code is unchanged.
• The claim queues the record it re-read under the claim mutex, not the startup snapshot, so a run that finished the file meanwhile isn't overwritten with stale data.
• A worker that crashed on another host holds its files for up to 1 hour (STALE_LOCK_MS), since its PID can't be probed from here.
• New cases in process-revalidate.test.ts cover live, dead, own, and analyzed locks in both modes, cross-host locks, the warning, and the snapshot case. pnpm lint and the processor build pass.
• Default process behavior is unchanged, and a resumed run still claims its own files. This is the lock fix from fix: harden deepsec processor locks #85, resubmitted on its own.

Ran live: process --reinvestigate --limit 2 with two files locked by a live run analyzed 0 files before 8c134df and 2 after, warning about the 2 skipped files.

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[auto-maintain]

🤖 auto-maintain review

Automated, advisory triage for @tlq5l's PR. Facts below are read from the GitHub API.

Check	Result
Author's merged PRs (this repo)	0 — ⚠️ first-time contributor
Account established	✅ (age 724d · 9 followers · 13 public repos)
Commits signed/verified	✅ 8/8

Review panel: 🔴 high highest severity

deepsec maintainer code review: 🔴 high

The lock fix is incomplete because direct mode can still overwrite concurrent processing during its preceding scan.

• packages/deepsec/src/commands/process.ts:314 — Direct mode scans before acquiring the claim mutex. scanFiles performs an unlocked read-modify-write of the entire FileRecord, so a concurrent run can claim or finish after that read and then have its lock, findings, and analysisHistory overwritten by the stale scan write. The direct-mode data-loss race therefore remains.
• packages/processor/src/index.ts:559 — The skip branch adds files when they are merely no longer claimable, not only when heldByOther is true. If a default-mode candidate becomes analyzed and unlocked before the fresh read, skippedCount and the warning falsely report a live lock.

General code review: 🔴 high

The processor claim is protected, but direct mode can still overwrite another run's completed analysis during its preceding scan.

• packages/deepsec/src/commands/process.ts:314 — Direct mode scans before the guarded claim. `scanFiles()` read-modify-writes the entire FileRecord without coordinating with its live owner; if that owner finishes between the scan's read and write, the scan restores its stale processing snapshot and erases the new findings/analysisHistory. The later claim cannot recover the lost data, so concurrent direct runs can still cause the overwrite this PR intends to prevent.

Scanner and matcher quality: 🔴 high

The lock handling remains bypassable in direct mode and can still overwrite concurrent results or produce a false-clean CI result.

• packages/scanner/src/index.ts:759 — Direct mode scans before claiming locks; scanFiles performs an unlocked read-modify-write, so a concurrent processor can finish between lines 724 and 759 and have its findings/history and cleared lock overwritten by the stale record. The lock fix therefore still permits the data loss it targets.
• packages/processor/src/index.ts:302 — A run that skips locked files is marked done, but resuming that run returns skippedCount 0. Retrying direct mode with --run-id therefore reports “No findings” and exits successfully although requested files were never investigated.

Sandbox and credential boundaries: 🟡 medium

The lock-respecting claim logic is sound in principle, but the new direct-mode exit-1 turns ordinary cross-host stale locks (routinely produced by killed sandboxes, whose run metas are never flipped to error) into an hour-long CI failure with no override, and the future-timestamp escape hatch makes locks instantly stealable under modest clock skew.

• packages/deepsec/src/commands/process.ts:393 — New exit-1 path in direct mode is reachable without any concurrent run and has no override: the whole `data/` dir (including `runs/*.json`) is uploaded to and downloaded back from sandboxes (DATA_EXCLUDES is empty) and `mergeFileRecord` prefers the incoming `lockedByRunId`/`lockedAt`, while nothing on the host ever flips a killed sandbox run's meta to `error`. A sandbox that is OOM-killed or timed out therefore leaves records in `processing` locked by a run whose hostname isn't local, so the PID probe is skipped and the lock is non-reclaimable for the full STALE_LOCK_MS. Every `process --diff/--files` run touching those files then prints "not a clean review" and exits 1 for up to an hour, where before the PR force mode reclaimed and reviewed them. This also contradicts the PR description's "The exit code is unchanged."
• packages/processor/src/index.ts:400 — Treating a future-dated `lockedAt` as reclaimable reintroduces the double-claim this PR exists to prevent. Before the change a future stamp yielded a negative age and the lock was held; now any lock more than FUTURE_SKEW_MS ahead of local time is stealable immediately, so if a peer host's clock is >5 minutes fast (or a merged sandbox record carries a bogus timestamp) two runs claim the same file and clobber each other's findings/analysisHistory. The stated rationale is also wrong — a future stamp does age out, at lockedAt+1h. Clamping a future stamp to "treat as freshly locked" keeps both properties; only the NaN case needs the escape hatch.
• packages/processor/src/index.ts:560 — `lockedPaths` conflates "held by another run" with "not claimable", so in default mode a file that another still-running run finished between the snapshot and the claim (status `analyzed`, lock already cleared → heldByOther false, isClaimable false) is counted in `skippedCount` and named in the warning as "locked by another run and were skipped". That is the common outcome of two overlapping runs, so the count and message overstate contention, and any caller that later gates on `skippedCount` the way direct mode now does would fail on files that were in fact reviewed.

Durability and distributed state: 🔴 high

The change still permits concurrent FileRecord overwrites in direct mode and after fixed-duration lock expiry.

• packages/deepsec/src/commands/process.ts:314 — Direct mode scans and rewrites FileRecords before acquiring the claim mutex. If it reads while another run is processing and writes after that run persists findings, the stale scan record erases those findings/history before the new claim re-read, so the advertised lock fix still permits permanent data loss.
• packages/processor/src/index.ts:401 — A lock becomes reclaimable after one hour even when RunMeta still says running and a same-host PID is alive. Any legitimate investigation exceeding that fixed lease can therefore be claimed concurrently, allowing the last writer to erase the other run's findings/history; the lock needs renewal or must not expire while owner liveness is established.

_{Posted by auto-maintain. This automated code review is advisory; a human maintainer makes the call.}

[tlq5l]

Thanks for the review. You were right: force mode only respected a live lock when the owning run was on this host. The new commits drop that host check, so force mode now leaves a file alone whenever another run's lock isn't reclaimable, on any host. Tests cover a fresh lock from another host (left alone), an old lock and a finished run's lock (both taken), and a claim that keeps another run's newer findings. I've updated the description to match.

[tlq5l]

Fixed in 8c134df:

• --limit now counts files actually claimed, so locked files no longer use up slots.
• The skipped-files warning now prints in every mode, including --reinvestigate.

I left the scanFiles() race and the claim-time re-read race alone, since this PR doesn't introduce them.

[tlq5l]

Thanks. Fixed in f310548 and cbb0f7d:

• Fresh foreign lock on a pending/error record: the claim step now checks isReclaimableLock first, whatever the status.
• lockedAt: an unparseable timestamp, or one more than 5 minutes in the future (clock drift), counts as reclaimable.
• Skipped count: process() returns skippedCount, and direct mode (--diff, --files) exits 1 when a requested file was skipped because another run holds it.
• Forged locks in CI: with that exit code a forged lock turns the job red. I kept lock-honoring in direct mode so two runs can't overwrite each other; a real overlapping run also fails until it finishes. Other PR-controlled state is out of scope here: a record whose filePath doesn't match its location is still skipped uncounted (predates this PR).
• Default-mode warning: 8c134df missed processing files held by a live run, which were dropped before the claim step. cbb0f7d sends them through it, so they're warned about and counted.
• Lease renewal: out of scope; happy to do it in a follow-up.

Ran live: the bundled CLI in direct mode with planted locks. Fresh foreign locks exit 1; expired, garbage-dated and dead-PID locks are reclaimed and exit 0.

[tlq5l]

Closing this. Review found that direct mode still rewrites the file record in scanFiles() before the claim, so the overwrite in #182 isn't fully fixed, and the lock-expiry changes added new edge cases. #182 stays open; the stub-agent repro test is on this branch. The code, tests, description and replies here were written by coding agents (Claude Code).