Observability Handbook
Implements structured logging, request correlation IDs, and PII-safe error reporting for Next.js App Router applications.
The Observability Handbook skill equips Claude with architectural patterns and implementation standards for production telemetry across Next.js App Router applications. It guides the generation and propagation of request correlation IDs across middleware, Route Handlers, and Server Actions while enforcing strict PII boundaries to keep sensitive credentials, tokens, and personal data out of logs. By standardizing structured JSON line logging, client-side error sanitization, and vendor-neutral OpenTelemetry instrumentation, this skill ensures robust system visibility and straightforward incident diagnosis without locking your project into specific APM providers.