api-observability-axiom-pino-sentry
Observability Patterns (Logging, Tracing, Error Handling)
Quick Guide: Structured logging with Pino (debug/info/warn/error). Correlation IDs for request tracing. Sentry error boundaries in React. Attach user context after auth. Filter expected errors (404s). Create Axiom monitors for alerts.
<critical_requirements>
CRITICAL: Before Using This Skill
All code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering,
import type, named constants)
(You MUST include correlation ID in ALL log statements for request tracing)
(You MUST use structured logging with required fields: level, message, correlationId, timestamp)
(You MUST filter expected errors (404, validation) from Sentry to avoid quota waste)
(You MUST attach user context to Sentry AFTER authentication completes)
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