Testing & Debugging Skills

Audit a codebase's source for non-functional violations — how it runs rather than whether it is correct. Catches resource leaks (processes, handles, locks outliving their owner; unbounded growth), structural performance smells (blocking the hot path, quadratic or repeated work, polling where an event belongs), and concurrency hazards (shared state mutated without a lock, check-then-act races, locks held across slow work). Use when asked to audit performance, resource use, cleanup, leaks, concurrency, contention, or how the system behaves under load and at scale.

Audit a test suite for testing-discipline violations — tests that need live external processes or services, tests coupled to implementation details instead of observable behavior, behaviors that landed without a test, non-deterministic tests that race on timing or leak state between cases, and copy-paste test bloat that should be parametrized. Use when asked to audit tests, check test quality, verify coverage discipline, audit the test suite, or review whether a change is properly and maintainably tested.

Tidy and improve a project's documentation tree — relocate design/plan files misfiled as docs, reconcile docs that have drifted from the code they describe, fix dead links and stale references, and flag (never silently delete) duplicates and intentional mirrors. Use when asked to clean up docs, organize the docs folder, fix doc drift or dead links, separate plans from documentation, or audit documentation for staleness.