{
  "sha": "9b51f95ef609a219e211e37b082cd2e6913190e0",
  "model": "moonshotai/kimi-k3",
  "effort": "high",
  "found_per_pass": {
    "agent": 7
  },
  "findings": [
    {
      "path": "services/proxy/src/routes/admin.rs",
      "start_line": 76,
      "end_line": 76,
      "label": "bug",
      "severity": "critical",
      "explanation": "The on-demand sweep route calls `app.sweeper.sweep(dry_run)` directly and never acquires the `running` mutex — only `Sweeper::run()` (sweep.rs:83) locks it — so a manual `POST /v1/admin/cache/sweep`…\n\nThe on-demand sweep route calls `app.sweeper.sweep(dry_run)` directly and never acquires the `running` mutex — only `Sweeper::run()` (sweep.rs:83) locks it — so a manual `POST /v1/admin/cache/sweep` runs concurrently with the interval sweep, and both decide removals from a shared `remaining` total, deleting up to twice the bytes needed and taking the store far below the ceiling (the exact failure sweep.rs:10-12's \"one sweep at a time\" comment says the mutex exists to prevent).",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 91,
      "end_line": 91,
      "label": "bug",
      "severity": "high",
      "explanation": "clear_partials` unconditionally unlinks every file in `incoming`, including partial writes of fetches actively streaming right now (`BlobWriter` holds its temp file open there until commit, per…\n\nclear_partials` unconditionally unlinks every file in `incoming`, including partial writes of fetches actively streaming right now (`BlobWriter` holds its temp file open there until commit, per store.rs:171-180) — a sweep during a long download deletes the in-progress file, which then commits to a dangling path or fails, so a client request gets a 500 because the timer fired mid-fetch; the doc comment's claim that \"a file in `incoming` is a fetch that is not coming back\" is false for any fetch in flight.",
      "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` fifth and `sweep_blobs_removed` sixth, but `COUNTERS` lists `cairn_proxy_sweep_blobs_removed_total` fifth and `cairn_proxy_sweep_bytes_reclaimed_total` sixth…\n\nvalues()` loads `sweep_bytes_reclaimed` fifth and `sweep_blobs_removed` sixth, but `COUNTERS` lists `cairn_proxy_sweep_blobs_removed_total` fifth and `cairn_proxy_sweep_bytes_reclaimed_total` sixth — so the two sweep metrics are permanently rendered under each other's names, silently swapping every reported value (the exact failure the comment above says the pairing exists to prevent).",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/routes/admin.rs",
      "start_line": 76,
      "end_line": 76,
      "label": "performance",
      "severity": "high",
      "explanation": "sweep()` is synchronous — it walks the whole store with blocking `fs` calls, and `referenced()` additionally reads and JSON-parses every index entry file — so calling it from the axum handler blocks…\n\nsweep()` is synchronous — it walks the whole store with blocking `fs` calls, and `referenced()` additionally reads and JSON-parses every index entry file — so calling it from the axum handler blocks the worker thread for the duration of a full scan of a large store, stalling all other requests (the same blocking walk also runs on the timer at main.rs:116); the \"synchronous walk costs less\" rationale in sweep.rs only holds if it were dispatched to `spawn_blocking`.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 140,
      "end_line": 140,
      "label": "bug",
      "severity": "medium",
      "explanation": "forget(&index, &gone)` runs even on a dry run (sweep.rs:90's `dry_run` gate only covers blob and partial removal), so `POST /v1/admin/cache/sweep?dry_run=true` permanently deletes index entries —…\n\nforget(&index, &gone)` runs even on a dry run (sweep.rs:90's `dry_run` gate only covers blob and partial removal), so `POST /v1/admin/cache/sweep?dry_run=true` permanently deletes index entries — directly contradicting the documented \"reports what a sweep would reclaim without removing anything\" and forcing refetches/re-registration for those coordinates.",
      "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` (logged at :130) the code still does `bytes += candidate.size; removed += 1` unconditionally, so `Reclaimed` and the…\n\nafter a failed `fs::remove_file` (logged at :130) the code still does `bytes += candidate.size; removed += 1` unconditionally, so `Reclaimed` and the `cairn_proxy_sweep_bytes_reclaimed_total`/`blobs_removed_total` counters report space as reclaimed that is still on disk — the metric operations docs tell operators to alert on.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/config.rs",
      "start_line": 83,
      "end_line": 83,
      "label": "bug",
      "severity": "low",
      "explanation": "Duration::from_hours(1)` and `Duration::from_mins(15)` (also used at :84 and in tests at :350-351) are nightly-only std APIs, while services/proxy/rust-toolchain.toml pins `channel = \"stable\"` — the…\n\nDuration::from_hours(1)` and `Duration::from_mins(15)` (also used at :84 and in tests at :350-351) are nightly-only std APIs, while services/proxy/rust-toolchain.toml pins `channel = \"stable\"` — the crate will not compile on the pinned toolchain once that gate hits stable Rust.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    }
  ]
}