Use when designing, changing, or debugging backend server code (REST, Node.js/TypeScript, Go), especially endpoints, response envelopes, pagination, migrations, queries, auth, password hashing, secrets, or deploys; also for N+1 queries, races, IDOR, SSRF/injection, goroutine leaks, unhandled rejections, event-loop blocking, graceful shutdown, or production-only migration failures.
Use when designing, changing, or debugging backend server code (REST, Node.js/TypeScript, Go), especially endpoints, response envelopes, pagination, migrations, queries, auth, password hashing, secrets, or deploys; also for N+1 queries, races, IDOR, SSRF/injection, goroutine leaks, unhandled rejections, event-loop blocking, graceful shutdown, or production-only migration failures.
Use when a feature or refactor changes public contracts, schemas, shared integration points, cross-layer data flow, release behavior, or other high-risk architecture decisions.
Use when designing or debugging high-concurrency Go services, especially worker pools, backpressure, bounded channels, errgroup/WaitGroup, rate limits, load shedding, circuit breakers, GOMAXPROCS, or connection pools; also for load-time OOM, rising goroutines, lock contention, p99 spikes, retry storms, pprof, singleflight, semaphore, or production-only collapse.
Use when writing a git commit message, Japanese UI copy or app strings (ボタン/エラーメッセージ等の文言), code review comments, or a completion report, especially when tone, formality, verbosity, or review phrasing is uncertain.
Use when creating, regenerating, or auditing a repository-specific development harness, contract system, risk router, evidence gate, or project workflow policy.
Use when a feature or refactor changes public contracts, schemas, shared integration points, cross-layer data flow, release behavior, or other high-risk architecture decisions.
Use when designing or debugging high-concurrency Go services, especially worker pools, backpressure, bounded channels, errgroup/WaitGroup, rate limits, load shedding, circuit breakers, GOMAXPROCS, or connection pools; also for load-time OOM, rising goroutines, lock contention, p99 spikes, retry storms, pprof, singleflight, semaphore, or production-only collapse.