error-handling

Design error handling for API boundaries by enforcing typed errors and explicit failure modes. Translate internal domain errors into user-friendly messages at boundaries to maintain stable APIs and prevent silent failures across modules.

Implement retry and circuit breaker strategies by defining policies that detect transient failures and halt traffic when a downstream service becomes unavailable. This prevents cascading failures and allows systems to recover gracefully without overwhelming resources.

Translate typed errors into safe user-facing messages through boundary translation. Map internal domain-specific error types to stable, generalized API responses, ensuring that sensitive internal state or stack traces are never exposed to the end user.

Poorly handled error logic causes silent failures and brittle systems because untyped or swallowed exceptions bypass normal control flow. Without explicit typed errors, failures remain undetected, leading to confusing UX and unpredictable application state.

Yes, you can audit a failing function to implement typed errors and boundary translation. Identify existing failure modes, define explicit typed errors, and apply boundary translation to convert internal exceptions into safe, retryable operations.

You need typed errors instead of generic exception handling when operating across module boundaries or API layers. Typed errors enforce explicit failure modes, making error handling predictable and enabling precise boundary translation for user-facing messages.