Use when working in Coop and needing the local app, receiver PWA, docs, API/signaling server, or extension watcher.
Browser and visual verification for Coop app, extension, popup, sidepanel, and receiver flows. Use when UI changes need rendered proof, console inspection, screenshots, Playwright checks, or local browser debugging.
Debugging & Troubleshooting - systematic root cause investigation with hypothesis testing and evidence collection. Use when the user reports a bug, encounters an error, sees unexpected behavior, or says 'debug this' or 'investigate this issue'.
Quality gate and regression monitor. One-shot (`/monitor`) or continuous (`/loop 5m /monitor`). Scope with --tests, --build, or run all checks by default.
Performance profiling and optimization - bundle analysis, Lighthouse CI, React Profiler, memory leaks, service worker cache efficiency. Use for performance investigations, optimization, and budget enforcement.
Planning & Execution - create structured implementation plans, check progress, execute in batches, manage lifecycle. Use when the user says 'plan this', asks to break down a feature into steps, or needs a phased implementation strategy before coding.
Code Review & PR Creation - 6-pass systematic review covering correctness, security, performance, patterns, testing, and documentation. Use when reviewing a PR, auditing code changes, or the user asks for systematic code quality analysis.
Testing patterns - TDD workflow, Vitest unit tests, Playwright E2E, mock strategies, and coverage targets. Use when writing tests, setting up test infrastructure, following TDD, or diagnosing test failures.