{
  "sha": "9b51f95ef609a219e211e37b082cd2e6913190e0",
  "model": "anthropic/claude-sonnet-5",
  "effort": "high",
  "found_per_pass": {
    "agent": 4
  },
  "findings": [
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 102,
      "end_line": 102,
      "label": "bug",
      "severity": "critical",
      "explanation": "candidates.sort_by_key(|candidate| candidate.age)` sorts ascending, so the smallest `age` (most recently modified, i.e. newest) blob is first and the largest `age` (oldest, longest-unwanted) blob is…\n\ncandidates.sort_by_key(|candidate| candidate.age)` sorts ascending, so the smallest `age` (most recently modified, i.e. newest) blob is first and the largest `age` (oldest, longest-unwanted) blob is last. The removal loop that follows walks the vector front-to-back and stops once `remaining < self.max_bytes`, so it evicts the *newest* blobs first and leaves the truly stale ones in place until every newer blob has already gone — the opposite of the \"oldest blobs go, this morning's fetch stays\" behaviour the comment above it and `docs/operations.md`/`docs/architecture.md` describe. Fix by sorting oldest-first, e.g. `sort_by_key(|c| std::cmp::Reverse(c.age))`.",
      "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, even when `dry_run` is true.\n\n`gone` is populated for every candidate that satisfied the `remove` condition regardless of `dry_run` (the file removal itself is the only thing gated on `!dry_run`, at line 125), so a dry run actually deletes the on-disk index-entry files for those digests via `fs::remove_file` inside `forget`. This contradicts the documented contract that `?dry_run=true` \"reports what a sweep would reclaim without removing anything\" (docs/operations.md, routes/admin.rs:58-60) — a preview call leaves the store's index mutated.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/metrics.rs",
      "start_line": 94,
      "end_line": 94,
      "label": "bug",
      "severity": "high",
      "explanation": "The order of `values()` (`sweep_bytes_reclaimed` then `sweep_blobs_removed`) does not match the order of `COUNTERS` (`cairn_proxy_sweep_blobs_removed_total` then…\n\nThe order of `values()` (`sweep_bytes_reclaimed` then `sweep_blobs_removed`) does not match the order of `COUNTERS` (`cairn_proxy_sweep_blobs_removed_total` then `cairn_proxy_sweep_bytes_reclaimed_total`, metrics.rs:50-57), so `render()` zips them and prints the bytes-reclaimed value under the `..._blobs_removed_total` name and the blobs-removed value under `..._bytes_reclaimed_total`. This is exactly the mistake the adjacent doc comment (\"Keeping the two side by side is what stops a fifth counter from being rendered under a fourth one's name\") warns against, and it breaks the alert `docs/operations.md` tells operators to watch (`cairn_proxy_sweep_bytes_reclaimed_total`), since that metric will actually be a blob count.",
      "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 route calls `app.sweeper.sweep(dry_run)` directly instead of `app.sweeper.run()`, bypassing the `running: Mutex<()>` in `Sweeper` (services/proxy/src/sweep.rs:67,82-85) that the…\n\nThe on-demand sweep route calls `app.sweeper.sweep(dry_run)` directly instead of `app.sweeper.run()`, bypassing the `running: Mutex<()>` in `Sweeper` (services/proxy/src/sweep.rs:67,82-85) that the module's own doc comment (sweep.rs:10-12) says exists to guarantee \"one sweep at a time.\" A request to `POST /v1/admin/cache/sweep` while the background interval sweep (main.rs:116, via `Sweeper::run`) is in flight runs concurrently against the same directory, which per the module's own reasoning can \"take the store far below the ceiling either was aiming at.\"",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    }
  ]
}