The Resilience & Observability Stack

Short summary

Building production FastAPI isn't about features—it's about operational maturity: predictable errors, visible health, and self-healing systems. Implement observability with Structlog (JSON logging), Prometheus (metrics), Sentry (error tracking), and Rich (local tracebacks). Add resilience with Tenacity (exponential backoff retries) and SlowAPI (rate limiting). Critical insight: standardize error response contracts—every failure returns {detail: "..."} so your React frontend uses one Axios interceptor for all errors.

• •Standardize API error responses using {detail: "..."} contract so frontend needs only one error handler
• •Implement observability stack: Structlog (JSON logs), Prometheus (metrics), Sentry (error tracking), Rich (local debugging)
• •Add resilience with Tenacity (exponential backoff retries on transient failures) and SlowAPI (smart rate limiting)

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