Backend skills for AI coding agents

Small, reliable API endpoints with validation and tests.

Wire external APIs with typed clients and clear error paths.

Raise type safety without a noisy rewrite.

Make failure paths explicit, useful, and testable.

Build reliable webhook handlers with verification and retries.

Compare API shapes and flag breaking changes.

Review cache keys, invalidation, TTLs, and stale data risk.

Turn noisy logs into useful operational signals.

Build useful fake APIs for frontend and demos.

Review async jobs for retries, idempotency, and dead letters.