{
  "sha": "9b51f95ef609a219e211e37b082cd2e6913190e0",
  "model": "z-ai/glm-5.3-flash",
  "effort": "high",
  "found_per_pass": {
    "agent": 7
  },
  "findings": [
    {
      "path": "services/proxy/src/metrics.rs",
      "start_line": 94,
      "end_line": 94,
      "label": "bug",
      "severity": "high",
      "explanation": "values()` returns `sweep_bytes_reclaimed` then `sweep_blobs_removed`, but `COUNTERS` (lines 50-57) lists `..._blobs_removed_total` first, and `render` zips the two — each scrape renders the byte…\n\nvalues()` returns `sweep_bytes_reclaimed` then `sweep_blobs_removed`, but `COUNTERS` (lines 50-57) lists `..._blobs_removed_total` first, and `render` zips the two — each scrape renders the byte count under `cairn_proxy_sweep_blobs_removed_total` and the blob count under `..._bytes_reclaimed_total`. Operations.md tells operators to alert on `cairn_proxy_sweep_bytes_reclaimed_total`, which would actually report blob counts.",
      "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, but `gone` is populated even when `dry_run` is true (line 137), and `forget` really deletes the index files (line 252).\n\nA `?dry_run=true` sweep — documented as reporting \"without removing anything\" (admin.rs, operations.md) — deletes index entries for blobs a hypothetical sweep would remove, turning \"would be reclaimed\" into \"will be reclaimed\": the surviving blobs become unreferenced and the next real sweep takes them.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/admin.rs",
      "start_line": 76,
      "end_line": 76,
      "label": "bug",
      "severity": "high",
      "explanation": "reclaim` calls `app.sweeper.sweep(dry_run)` directly, bypassing the `running` mutex that `Sweeper::run` (sweep.rs:82-85) exists to take.\n\nAn on-demand sweep therefore runs concurrently with the background sweep — both compute `held` from the same store and each evicts down to the ceiling, taking the store far below the ceiling either aimed at, exactly the failure the module doc (sweep.rs:10-12) says the type prevents.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 84,
      "end_line": 84,
      "label": "performance",
      "severity": "medium",
      "explanation": "run` is `async` but calls the fully synchronous `self.sweep(false)` — a blocking recursive `read_dir`/`remove_file` walk over up to tens of thousands of files — directly on a tokio worker thread…\n\nrun` is `async` but calls the fully synchronous `self.sweep(false)` — a blocking recursive `read_dir`/`remove_file` walk over up to tens of thousands of files — directly on a tokio worker thread (spawned at main.rs:116), stalling that worker for the whole pass instead of using `tokio::task::spawn_blocking`. The module doc rejects `tokio::fs` per-call overhead but not the blocking-the-executor cost; the route handler (admin.rs:76) blocks a worker the same way inside an async request.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 232,
      "end_line": 232,
      "label": "bug",
      "severity": "medium",
      "explanation": "clear_partials` removes every file in `incoming` with no age check, but `incoming` is also where live downloads are written (`temp_path`, store.rs:201-206, files that persist for the up-to-30s…\n\nclear_partials` removes every file in `incoming` with no age check, but `incoming` is also where live downloads are written (`temp_path`, store.rs:201-206, files that persist for the up-to-30s `fetch_timeout`). A sweep concurrent with traffic unlinks temp files of in-flight fetches; the writer keeps writing to the unlinked inode and `commit`'s rename fails (store.rs:259), so clients get 500s. The comment's premise (\"a file in `incoming` is a fetch that is not coming back\") is false for fetches still in flight.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 119,
      "end_line": 119,
      "label": "bug",
      "severity": "low",
      "explanation": "a blob with no index entry is removed regardless of age.\n\nBetween `writer.commit()` (cache.rs:151) and `store.link()` (cache.rs:163) there is a window — the registry registration network call — during which the just-committed blob is on disk but unreferenced, so a sweep in that window deletes it and the client gets the \"blob committed by this request is already missing\" 500 (cache.rs:90-97). The min-age grace period is documented as covering \"a package one job in a pipeline fetched\" but does not cover this case.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    },
    {
      "path": "services/proxy/src/sweep.rs",
      "start_line": 164,
      "end_line": 164,
      "label": "bug",
      "severity": "low",
      "explanation": "fs::metadata` follows symlinks, so the comment's claim that \"a link is counted at the size of the link and not of whatever it points at\" is false — linked-in blobs are counted at their target's full…\n\nfs::metadata` follows symlinks, so the comment's claim that \"a link is counted at the size of the link and not of whatever it points at\" is false — linked-in blobs are counted at their target's full size (over-counting toward eviction), and a symlinked directory is recursed into (line 168), which on a link pointing back up the tree never terminates. `symlink_metadata` plus a link/skip decision is what the comment describes.",
      "evidence": null,
      "suggested_fix": null,
      "deterministic": false
    }
  ]
}