Skill Claude CodeCodex
Implement observability using the Wide Events (Canonical Log Lines) pattern. Instead of scattering logs throughout a request, accumulate high-cardinality context and emit a single, highly-dimensional structured event per service boundary.
Skill Claude CodeCodex
Write integration tests for Cloudflare Workers using vitest-pool-workers and cloudflare:test. Tests the full HTTP cycle — request through handler, middleware, bindings (D1, KV, R2, DO, Hyperdrive), and back. Use when adding test coverage to a Worker, when a new route/endpoint is created, or when /nightshift, /swarm…