{"answer":"🟠 `bug` services/proxy/src/sweep.rs:232: Every file in `incoming` is unlinked without determining whether its `BlobWriter` is still active; a scheduled or admin sweep can unlink an in-progress fetch’s temporary file, causing its later commit/rename to fail and the download to return an error.\n\n🟠 `bug` services/proxy/src/sweep.rs:119: The index snapshot is taken before the blob walk and is not coordinated with fetches, so a blob committed between those steps and its subsequent `store.link` is treated as unreferenced and deleted; that request then fails reopening its just-committed blob and leaves a stale index entry.\n\n🟡 `bug` services/proxy/src/sweep.rs:102: Sorting ages ascending visits the newest eligible blobs first, despite the intended “oldest blobs” policy, so eviction discards recently cached artifacts before older ones.\n\n🟡 `bug` services/proxy/src/routes/admin.rs:76: The admin handler calls the synchronous sweep directly instead of acquiring `Sweeper::running`; simultaneous admin requests can run overlapping destructive sweeps, violating the one-sweep-at-a-time guarantee and blocking Tokio worker threads during filesystem traversal.\n\n🔵 `bug` services/proxy/src/metrics.rs:94: `values()` returns reclaimed bytes in the slot named `cairn_proxy_sweep_blobs_removed_total`, while the blob count is emitted as bytes, so both new Prometheus metrics report the wrong quantities.\n\n🔵 `bug` services/proxy/src/main.rs:108: `tokio::time::interval` delivers its first tick immediately, not one interval later as intended, so each proxy startup immediately sweeps an existing cache rather than waiting for `CAIRN_SWEEP_INTERVAL`.","auth":{"mode":"api_key"},"effort":"high","elapsed_secs":112.967,"error":null,"error_kind":null,"instructions":[],"model":"openai/gpt-5.6-terra","ok":true,"sandbox":{"backend":"macOS Seatbelt","denied_read_roots":["/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/subjects"],"environment":["HOME","LANG","LC_ALL","PATH","TERM","TMPDIR"],"mode":"read-only","network":"denied","protected_write_roots":["/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B/.git","/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B/.afi","/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B/.agents","/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B/.codex","/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B/AGENTS.md","/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B/CLAUDE.md"],"readable_paths":["/"],"readable_roots":["/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/benchee-agent-JJqI3B","/bin","/sbin","/usr/bin","/usr/sbin","/usr/lib","/usr/libexec","/usr/share","/System/Library","/Library/Apple","/Library/Filesystems/NetFSPlugins","/Library/Preferences","/private/etc","/private/var/db/timezone","/private/var/db/DarwinDirectory/local/recordStore.data","/private/var/select/developer_dir","/private/var/select/sh","/opt/homebrew/bin","/opt/homebrew/Cellar","/opt/homebrew/etc/gitconfig","/opt/homebrew/lib","/opt/homebrew/opt","/usr/local/bin","/Applications/Xcode.app/Contents/Developer","/Applications/Xcode.app/Contents","/Users/bart.smykla@konghq.com/.local/bin/afi"],"writable_roots":["/private/var/folders/d1/tvmyp5cs1gz38rltf390ddpw0000gn/T/afi-sandbox-CQHPt1"]},"schema_version":1,"source":"openrouter","sources":[{"auth":{"mode":"api_key"},"source":"openrouter","usage":{"cache_read_tokens":91985,"cache_write_tokens":43278,"cost_usd":0.21967,"estimated_tokens":0,"input_tokens":15,"output_tokens":1445,"reasoning_tokens":6309,"requests":5,"total_tokens":143032}}],"system_prompt":{"file":null,"mode":"builtin"},"tools":["read_file","write_file","edit_file","list_dir","search_files","glob_files","run_bash","wait_background"],"usage":{"budget":{"converged":false,"hard_ratio":0.95,"limit_usd":8.0,"soft_ratio":0.8,"spent_usd":0.21967,"stopped":false},"cache_read_tokens":91985,"cache_write_tokens":43278,"cost_usd":0.21967,"estimated_tokens":0,"input_tokens":15,"output_tokens":1445,"reasoning_tokens":6309,"refused_by_approval":0,"refused_by_policy":0,"refused_tool_calls":0,"requests":5,"total_tokens":143032}}