{"answer":"Here are my findings after reading all the changed files in full.\n\n🔴 `bug` services/proxy/src/metrics.rs:88: `COUNTERS[4]` is `cairn_proxy_sweep_blobs_removed_total` and `COUNTERS[5]` is `cairn_proxy_sweep_bytes_reclaimed_total`, but `values()[4]` loads `self.sweep_bytes_reclaimed` while `values()[5]` loads `self.sweep_blobs_removed`. The `render()` method zips them positionally, so every metrics scrape would report the blob count under the \"bytes reclaimed\" metric name and the byte count under the \"blobs removed\" metric name — the two new counters are swapped.\n\n🟠 `bug` services/proxy/src/admin.rs:76: the on-demand sweep route calls `app.sweeper.sweep(dry_run)` directly, which never acquires the `Sweeper::running` mutex. Only the background path (`Sweeper::run()`) locks that mutex. Two concurrent POSTs to `/v1/admin/cache/sweep`, or one concurrent with the background sweep, therefore execute `sweep()` simultaneously, each making independent removal decisions against a filesystem state the other is mutating — directly violating the \"one sweep at a time\" invariant documented in `sweep.rs:10-12`.","auth":{"mode":"api_key"},"effort":"high","elapsed_secs":271.495,"error":null,"error_kind":null,"instructions":[],"model":"deepseek/deepseek-v4-flash","ok":true,"sandbox":{"backend":"macOS Seatbelt","denied_read_roots":[],"environment":["HOME","LANG","LC_ALL","PATH","TERM","TMPDIR"],"mode":"read-only","network":"denied","protected_write_roots":["/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/.git","/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/.afi","/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/.agents","/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/.codex","/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/AGENTS.md","/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/CLAUDE.md"],"readable_paths":["/"],"readable_roots":["/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee","/Users/bart.smykla@konghq.com/Projects/github.com/smykla-skalski/benchee/.git","/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-z3sqoa"]},"schema_version":1,"source":"openrouter","sources":[{"auth":{"mode":"api_key"},"source":"openrouter","usage":{"cache_read_tokens":99328,"cache_write_tokens":0,"cost_usd":0.022014,"estimated_tokens":0,"input_tokens":70825,"output_tokens":1071,"reasoning_tokens":32206,"requests":6,"total_tokens":203430}}],"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":2.0,"soft_ratio":0.8,"spent_usd":0.022014,"stopped":false},"cache_read_tokens":99328,"cache_write_tokens":0,"cost_usd":0.022014,"estimated_tokens":0,"input_tokens":70825,"output_tokens":1071,"reasoning_tokens":32206,"refused_by_approval":0,"refused_by_policy":0,"refused_tool_calls":0,"requests":6,"total_tokens":203430}}