{
  "sha": "9b51f95ef609a219e211e37b082cd2e6913190e0",
  "model": "moonshotai/kimi-k3",
  "effort": "high",
  "found_per_pass": {
    "agent": 8
  },
  "findings": [
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 119,
      "end_line": 119,
      "label": "bug",
      "severity": "high",
      "explanation": "a blob with no index entry is deleted regardless of `min_age`, but a fetch commits the blob (cache.rs:151) and only writes the index entry after a registry round-trip (cache.rs:163), so a sweep in…\n\na blob with no index entry is deleted regardless of `min_age`, but a fetch commits the blob (cache.rs:151) and only writes the index entry after a registry round-trip (cache.rs:163), so a sweep in that seconds-long gap deletes the just-committed blob — the in-flight request then 500s at cache.rs:90-97 (\"already missing from the store\") despite the artifact existing.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 140,
      "end_line": 140,
      "label": "bug",
      "severity": "high",
      "explanation": "forget(&index, &gone)` runs unconditionally and `gone` is populated even when `dry_run` is true (line 137 sits outside the `if !dry_run` guard), so `POST /v1/admin/cache/sweep?dry_run=true` —…\n\nforget(&index, &gone)` runs unconditionally and `gone` is populated even when `dry_run` is true (line 137 sits outside the `if !dry_run` guard), so `POST /v1/admin/cache/sweep?dry_run=true` — documented as removing nothing — deletes live index entries for every blob it would have reclaimed, forcing refetches of all of them.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 232,
      "end_line": 232,
      "label": "bug",
      "severity": "high",
      "explanation": "clear_partials` deletes every file in `incoming/` with no age or name check, but in-flight downloads and index-link temp files live there (store.rs:171-180 and store.rs:147); a sweep overlapping any…\n\nclear_partials` deletes every file in `incoming/` with no age or name check, but in-flight downloads and index-link temp files live there (store.rs:171-180 and store.rs:147); a sweep overlapping any active fetch unlinks its temp file from under the open handle, so `commit`'s rename fails with ENOENT and a download that succeeded upstream returns a 500.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/routes/admin.rs",
      "start_line": 76,
      "end_line": 76,
      "label": "bug",
      "severity": "high",
      "explanation": "the on-demand sweep calls `sweeper.sweep()` directly, bypassing the `Mutex` that `run()` holds for the whole sweep (sweep.rs:83), so an HTTP-triggered sweep can run concurrently with the interval…\n\nthe on-demand sweep calls `sweeper.sweep()` directly, bypassing the `Mutex` that `run()` holds for the whole sweep (sweep.rs:83), so an HTTP-triggered sweep can run concurrently with the interval sweep — the exact \"two sweeps over one directory\" over-deletion the module says the type prevents (sweep.rs:10-12) — and both will double-count the reclaimed metrics.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/metrics.rs",
      "start_line": 94,
      "end_line": 94,
      "label": "bug",
      "severity": "high",
      "explanation": "values()` loads `sweep_bytes_reclaimed` then `sweep_blobs_removed`, but `COUNTERS` declares blobs first (lines 50-57), so the two counters are exported swapped —…\n\nvalues()` loads `sweep_bytes_reclaimed` then `sweep_blobs_removed`, but `COUNTERS` declares blobs first (lines 50-57), so the two counters are exported swapped — `cairn_proxy_sweep_blobs_removed_total` reports bytes and `cairn_proxy_sweep_bytes_reclaimed_total` reports blob counts, defeating the pairing comment at lines 30-32 and the alerting docs/operations.md prescribes on the bytes counter.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/main.rs",
      "start_line": 116,
      "end_line": 116,
      "label": "performance",
      "severity": "high",
      "explanation": "sweeper.run()` executes the entire synchronous `std::fs` walk (readdir + stat + unlink over the whole store) directly on a runtime worker thread with no `spawn_blocking`, stalling request handling…\n\nsweeper.run()` executes the entire synchronous `std::fs` walk (readdir + stat + unlink over the whole store) directly on a runtime worker thread with no `spawn_blocking`, stalling request handling on that worker for the duration of the sweep — the same applies to the admin handler at routes/admin.rs:76, which is additionally on the untimed router so it can block for minutes on a large store.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 135,
      "end_line": 135,
      "label": "bug",
      "severity": "medium",
      "explanation": "after a failed `fs::remove_file` (line 126) the candidate is still counted in `removed`/`bytes` and pushed to `gone`, so the reported and recorded reclamation exceeds what was actually freed, and…\n\nafter a failed `fs::remove_file` (line 126) the candidate is still counted in `removed`/`bytes` and pushed to `gone`, so the reported and recorded reclamation exceeds what was actually freed, and `forget` (line 140) deletes index entries for blobs that are still on disk.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/main.rs",
      "start_line": 115,
      "end_line": 115,
      "label": "bug",
      "severity": "low",
      "explanation": "tokio::time::interval` completes its first tick immediately, contradicting the comment at lines 101-102 (\"the first tick is one interval away\") — a freshly started proxy sweeps at boot; use…\n\ntokio::time::interval` completes its first tick immediately, contradicting the comment at lines 101-102 (\"the first tick is one interval away\") — a freshly started proxy sweeps at boot; use `interval_at` with a delayed start to get the documented behavior.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    }
  ]
}