sandbox:read-only (macOS Seatbelt)
-- reasoning --
The user wants me to review a pull request diff and report only defects I can point at a specific line for. Let me carefully read the changed files in the `pr/` directory to understand the code and fi...
I'll review the PR diff against the code under `pr/`, starting with the sweep implementation and the call sites that wire it in.
└ 174 tok ·  45.7 tok/s · 12K ctx · 1556ms ttft ·  3.8s wall
↳ glob_files: glob pr/services/proxy/src/**/*.rs in .
└ glob_files: glob complete
↳ search_files: search pr/services/proxy for record_sweep|values\(|COUNTERS|sweep_
└ search_files: search complete
↳ search_files: search pr/services/proxy/src for IndexEntry|BlobStore|incoming|blobs/sha256
└ search_files: search complete
auto-compress is on at 85% but the context window of "x-ai/grok-4.5" on openrouter is unknown, so this run will not compress - set AFI_SOURCE_OPENROUTER_CONTEXT_WINDOW (or pass --context-window) to enable it
-- reasoning --
I found a critical bug already - metrics COUNTERS order vs values() order is swapped. Let me read the full files for more defects.
Metrics name/value order looks mismatched; next I'll read the sweep logic and store layout for more concrete defects.
└ 188 tok ·  62.2 tok/s · 14K ctx ·  823ms ttft ·  3.0s wall
↳ read_file: read pr/services/proxy/src/metrics.rs
└ read_file: read complete
↳ read_file: read pr/services/proxy/src/sweep.rs
└ read_file: read complete
↳ read_file: read pr/services/proxy/src/store.rs
└ read_file: read complete
↳ read_file: read pr/services/proxy/src/routes/admin.rs
└ read_file: read complete
↳ read_file: read pr/services/proxy/src/main.rs
└ read_file: read complete
↳ read_file: read pr/services/proxy/src/config.rs
└ read_file: read complete
-- reasoning --
I've found several concrete bugs. Let me analyze them carefully:
🔴 `bug` services/proxy/src/metrics.rs:50: COUNTERS array order `[..., sweep_blobs_removed, sweep_bytes_reclaimed]` does not match `values()` return order `[..., sweep_bytes_reclaimed, sweep_blobs_removed]` so the two sweep counters swap values on scrape
🔴 `bug` services/proxy/src/routes/admin.rs:48: `reclaim()` calls `app.sweeper.sweep(dry_run)` directly, bypassing `Sweeper::run()`'s `Mutex` acquisition so concurrent background sweeps and admin sweeps can run simultaneously
🔴 `bug` services/proxy/src/sweep.rs:109 `candidates.sort_by_key(|candidate| candidate.age)` sorts ascending (newest first) but comment claims "Oldest first"; over-ceiling removal therefore deletes recently-used blobs
🔴 `bug` services/proxy/src/sweep.rs:70: `clear_partials()` unconditionally removes every file in `incoming/` without 1) checking whether the file is still open by an active `BlobWriter` or 2) respecting `dry_run` for live partials, so concurrent fetches can be deleted mid-write
🔴 `bug` services/proxy/src/sweep.rs:100: `forget()` is called unconditionally after the removal loop, so `dry_run=true` still deletes index entries for blobs that were never removed
🔴 `bug` services/proxy/src/sweep.rs:132: `remaining >= self.max_bytes` continues eviction when `remaining == max_bytes` (store is already within ceiling) instead of `>` so the store is driven strictly below the limit
🔴 `bug` services/proxy/src/sweep.rs:136: failed `fs::remove_file()` still increments `removed`, subtracts from `remaining`, and calls `forget()` so a blob that could not be deleted is still counted as removed and its index entry is dropped
🔴 ` performance` services/proxy/src/sweep.rs:1: `sweep()` and `run()` run `std::fs` operations synchronously on the Tokio worker thread rather than `tokio::task::spawn_blocking`, blocking the async executor for the entire filesystem walk
🔴 `bug` services/proxy/src/sweep .rs:132: `remaining >= self.
Checking a few more call-path and API details to confirm the defects.
└ 2448 tok ·  53.1 tok/s · 32K ctx · 2967ms ttft · 46.1s wall
↳ search_files: search pr/services/proxy for from_hours|from_mins|spawn_blocking|dry_run|sort_by_key|MissedTickBehavior
└ search_files: search complete
↳ read_file: read pr/services/proxy/Cargo.toml
└ read_file: read complete
↳ glob_files: glob pr/services/proxy/**/*sweep* in .
└ glob_files: glob complete
↳ search_files: search pr/services/proxy for sweep|Sweeper|clear_partials|record_sweep
└ search_files: search complete
-- reasoning --
I've confirmed several bugs. Let me carefully analyze them:
🔴 `bug` services/proxy/src/metrics.rs:94: COUNTERS array lists sweep_blobs_removed before sweep_bytes_reclaimed but values() returns them in reverse order, so Prometheus labels them swapped
🔴 `bug` services/proxy/src/metrics.rs:94: COUNTERS array lists sweep_blobs_removed before sweep bytes_reclaimed but values() returns them in reverse order, so Prometheus labels them swapped
🟠 `bug` services/proxy/src/sweep.rs:140: sort_by_key sorts candidates by age ascending (newest first) despite comment claiming oldest first, so eviction removes recent blobs instead of oldest
🟠 `bug` services/proxy/src/sweep.rs:140: sort_by_key sorts candidates by age ascending (newest first) despite comment claiming oldest first, so eviction removes recent blobs instead of oldest
🟠 `bug` services/proxy/src/routes/admin.rs:70: sweep() calls app.sweeper.sweep without acquiring running Mutex, violating "one sweep at a time" guarantee and allowing concurrent background + admin sweeps
🟠 `bug` services/proxy/src/sweep.rs:0: sweep() does blocking std::fs calls on async runtime without spawn_blocking, blocking worker threads for large stores
🟡 ` bug` services/proxy/src/sweep.rs:240: forget() runs unconditionally even on dry_run, deleting index entries for digests that would be reclaimed
🟡 `  bug` services/proxy/src/sweep.rs:240: forget() runs unconditionally even on dry_run, deleting index entries for digests that would be reclaimed
🟡 `bug` services/proxy/src/sweep.rs:200: clear_partials removes all files in incoming without checking if still being written by active BlobWriter, causing rename failures on concurrent large fetches
🟡 `bug` services/proxy/src/sweep.rs:200: clear_partials removes all files in incoming without checking if still being written by active BlobWriter, causing rename failures on concurrent large fetches
🟡 `bug` services/proxy/src/sweep.
Checking one more detail on how in-flight temps interact with the index hex matching:
└ 2469 tok ·  52.5 tok/s · 35K ctx · 1206ms ttft · 47.0s wall
↳ read_file: read pr/services/proxy/src/digest.rs
└ read_file: read complete
↳ search_files: search pr/services/proxy/src/digest.rs for fn hex|as_str|parse\(
└ search_files: search complete
↳ read_file: read pr/services/proxy/src/routes/mod.rs
└ read_file: read complete
-- reasoning --
I've confirmed several concrete defects. Let me also verify the sort order more carefully - `sort_by_key(|candidate| candidate.age)` sorts ascending by age, so smallest age first (youngest first). Tha...🔴 `bug` services/proxy/src/sweep.rs:180: sort_by_key on age puts youngest blobs first, so eviction removes recently used blobs instead of oldest
🔴 `bug` services/proxy/src/sweep.rs:190: clear_partials removes files from incoming while BlobWriter still holds open FD, causing rename to fail with ENOENT and aborting in-flight fetches
🔴 `bug` services/proxy/src/sweep.rs:140: forget is called unconditionally after the loop, deleting index entries even when dry_run=true
🔴 `bug` services/proxy/src/routes/admin.rs:85: sweep does not acquire Swe er's mutex, allowing concurrent sweeps
🔴 `bug` services/proxy/src/sweep.rs:190: remove_file failures (already-gone blobs) still count as removed and trigger forget, deleting index entries for blobs that never existed
🔴 `bug` services/proxy/src/sweep.rs:50: sweep() is called synchronously from async handler thread, blocking the runtime for large stores
🔴 `bug` services/proxy/src/metrics.rs:23: COUNTERS array length 6 does not match values array length 6 (order mismatch between metrics definition and rendering)
🔴 `bug` services/proxy/src/sweep.rs:190 forget(&index, &gone) is called even on dry_run, so dry_run still mutates index entries
🔴 `bug` services/proxy/src/main.rs:85: spawn_sweeps uses tokio::time::interval which fires immediately on first tick, contrary to comment claiming first tick is one interval away
 services/proxy/src/sweep.rs:190: forget is called unconditionally after loop, deleting index entries even when dry_run=true
  services/proxy/src/sweep.rs:190: remove_file failures still count as removed and trigger forget
  services/proxy/src/sweep.
🔴 `bug` services/proxy/src/sweep.rs:140: `forget()` always deletes index entries, including when `dry_run` is true, so `POST /v1/admin/cache/sweep?dry_run=true` mutates the store and turns would-be victims into cache misses.
🔴 `bug` services/proxy/src/sweep.rs:224: `clear_partials` unlinks every file in `incoming`, including in-flight `BlobWriter` temps still being fetched; the later `rename` in `commit` then fails with ENOENT and the download is lost.
🔴 `bug` services/proxy/src/sweep.rs:102: `sort_by_key(|c| c.age)` orders youngest→oldest, so ceiling eviction deletes the most recently written blobs first and keeps cold ones.
🟠 `bug` services/proxy/src/metrics.rs:94: `values()` emits `sweep_bytes_reclaimed` then `sweep_blobs_removed`, but `COUNTERS` names them in the opposite order, so Prometheus scrapes swap the two series.
🟠 `bug` services/proxy/src/routes/admin.rs:76: on-demand `sweep()` calls `Sweeper::sweep` directly and skips the `running` mutex that `run()` holds, so a manual sweep can race the background sweeper and over-delete.
🟠 `bug` services/proxy/src/sweep.rs:90: the full filesystem walk/`unlink` pass runs inline on the async worker (admin handler and `run()` after `lock`), so a large store stalls the runtime and other requests for the whole sweep.
🟡 `bug` services/proxy/src/main.rs:108: `tokio::time::interval` fires its first tick immediately, so the process sweeps on startup contrary to the “first tick is one interval away” guarantee in the comment above.
🟡 `bug` services/proxy/src/sweep.rs:126: a failed `remove_file` is only logged; the blob is still counted as reclaimed and its digest is still passed to `forget()`, dropping index entries while the bytes may remain on disk.
└ 2236 tok ·  54.2 tok/s · 37K ctx · 1008ms ttft · 41.2s wall