scale-canarylisted

# Scale Canary (Performance & Resource Allocation Audit) <!-- SHARED:LANGUAGE_HEADER --> Audit code for scalability issues, performance bottlenecks, and resource leaks. ## Auditing Categories 1. **O(N^2) Complexity** — nested loops over growable collections without indexing or caching (crashes at scale). 2. **N+1 Database Queries** — querying records in a loop instead of a batch JOIN or bulk prefetch. 3. **Memory Bloat / Leaks** — appending to global arrays/maps without clearing them → unbounded growth. 4. **Blocking Main Loop** — synchronous FS ops or CPU-heavy work on the main event thread (lag/hangs). 5. **Resource Leakage** — streams, connections, or handles left open without a `finally` close. Per-ORM N+1 shapes, per-stack blocking patterns, and what NOT to flag: read `references/checks.md` before scanning. ## Fix mode (choice-gated) In Agent Context, after the report, present via `ask_question`: - **Apply safe optimizations:** async-ify synchronous file ops; insert `finally` blocks for stream closing. Each fix: checkpoint (git stash/commit in a git repo; else copy the file aside — never assume git) → apply → build + tests → auto-revert if newly red. - **Let me pick:** user selects specific optimizations. - **Report only:** exit unchanged. ## Grants & denials (CLASSIFY-BLOCK) | class | step it powers | grant | on denial | |---|---|---|---| | read | scan loops/queries/caches for the categories above | `Read`·`Grep`·`Glob` | refuse that file, name it — never a clea