{
  "sha": "9b51f95ef609a219e211e37b082cd2e6913190e0",
  "model": "z-ai/glm-5.3-flash",
  "effort": "high",
  "found_per_pass": {
    "agent": 8
  },
  "findings": [
    {
      "path": "services/proxy/src/metrics.rs",
      "start_line": 94,
      "end_line": 94,
      "label": "bug",
      "severity": "high",
      "explanation": "values()` returns `sweep_bytes_reclaimed` before `sweep_blobs_removed`, but `COUNTERS` (lines 51-57) lists `cairn_proxy_sweep_blobs_removed_total` first — `render()` zips them in order, so every…\n\nvalues()` returns `sweep_bytes_reclaimed` before `sweep_blobs_removed`, but `COUNTERS` (lines 51-57) lists `cairn_proxy_sweep_blobs_removed_total` first — `render()` zips them in order, so every scrape publishes the byte count under the blobs-removed name and vice versa; any alert or dashboard built on the documented counter names reads the wrong quantity.",
      "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` unlinks every file in `incoming` with no age or ownership check, but `BlobStore::writer` (store.rs:171-180) puts the temp file of every *in-flight* fetch there — a sweep concurrent…\n\nclear_partials` unlinks every file in `incoming` with no age or ownership check, but `BlobStore::writer` (store.rs:171-180) puts the temp file of every *in-flight* fetch there — a sweep concurrent with any active download unlinks its temp, so the fetch's `commit` rename fails (store.rs:259) and the download errors out; the \"a file in `incoming` is a fetch that is not coming back\" premise is false for live writers, and `CAIRN_CACHE_MIN_AGE` is not honoured here either.",
      "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, including on a dry run — nothing in `sweep` removes blobs during a dry run, yet `gone` holds every candidate that *would* be removed, so `?dry_run=true`…\n\nforget(&index, &gone)` runs unconditionally, including on a dry run — nothing in `sweep` removes blobs during a dry run, yet `gone` holds every candidate that *would* be removed, so `?dry_run=true` (documented as reporting \"without removing anything\") actually deletes the index entries naming those blobs, turning a read-only query into a destructive one.",
      "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 route calls `app.sweeper.sweep(dry_run)` directly, which does not take the `running` mutex (sweep.rs:83) that exists precisely so two sweeps cannot each compute from a total the other…\n\nthe on-demand route calls `app.sweeper.sweep(dry_run)` directly, which does not take the `running` mutex (sweep.rs:83) that exists precisely so two sweeps cannot each compute from a total the other is changing — a `POST /v1/admin/cache/sweep` racing the interval sweep (or a second POST) makes both evict against the same `held`, driving the store far below the ceiling and double-counting `removed`/`bytes` in the metrics.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 137,
      "end_line": 137,
      "label": "bug",
      "severity": "medium",
      "explanation": "when `fs::remove_file` fails (line 126), the blob is still pushed to `gone` and counted in `removed`/`bytes`, so `forget` deletes index entries pointing at a blob that still exists (next resolve…\n\nwhen `fs::remove_file` fails (line 126), the blob is still pushed to `gone` and counted in `removed`/`bytes`, so `forget` deletes index entries pointing at a blob that still exists (next resolve misses and refetches) and the sweep metrics overstate what was reclaimed.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/main.rs",
      "start_line": 108,
      "end_line": 108,
      "label": "bug",
      "severity": "medium",
      "explanation": "the doc comment claims \"the first tick is one interval away\", but `tokio::time::interval`'s first tick completes immediately, so a sweep runs at startup — harmless on an empty store, but on a…\n\nthe doc comment claims \"the first tick is one interval away\", but `tokio::time::interval`'s first tick completes immediately, so a sweep runs at startup — harmless on an empty store, but on a restart with a populated store and clients already hitting it, it makes the in-flight-partial deletion and the commit→link eviction window in `sweep.rs` fire on the very first requests rather than one interval in.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/routes/admin.rs",
      "start_line": 76,
      "end_line": 76,
      "label": "bug",
      "severity": "medium",
      "explanation": "sweep()` is fully synchronous (the module doc at sweep.rs:14-18 commits to stdlib `fs`), and the handler runs it inline on a tokio worker thread — a walk over tens of thousands of directories plus a…\n\nsweep()` is fully synchronous (the module doc at sweep.rs:14-18 commits to stdlib `fs`), and the handler runs it inline on a tokio worker thread — a walk over tens of thousands of directories plus a read of every index entry can block a worker for minutes, starving the very cache serves the untimed route exists to protect; it needs `spawn_blocking`.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 168,
      "end_line": 168,
      "label": "bug",
      "severity": "low",
      "explanation": "collect` recurses through symlinked directories (`fs::metadata` follows symlinks, `is_dir()` is true for a dir symlink) with no cycle check, despite the comment at lines 160-163 explicitly…\n\ncollect` recurses through symlinked directories (`fs::metadata` follows symlinks, `is_dir()` is true for a dir symlink) with no cycle check, despite the comment at lines 160-163 explicitly contemplating a store populated by links — a symlink loop under `blobs/` recurses until the stack overflows, taking down the process.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    }
  ]
}