error-handling-patterns

Design an error handling strategy by categorizing failures as recoverable or unrecoverable, then applying typed Result/Option outcomes or exception hierarchies with narrow catch boundaries to preserve causal chains and enable recovery.

Use typed Result types for expected, recoverable failures where explicit handling is required, and use exceptions for unrecoverable errors or invariant violations, ensuring errors remain structured and matchable for clear fault tolerance.

Implement retries with exponential backoff and circuit breakers to handle transient external dependency failures, applying graceful degradation and error aggregation to maintain visibility and prevent cascading system faults.

Structure matchable errors for API service code by shaping typed exception hierarchies or typed error models, narrowing catch boundaries, and preserving causal chains to produce meaningful, context-rich diagnostic messages.

Handle partial failures in batch operations through error aggregation, collecting and preserving context for each individual failure while applying graceful degradation to ensure the overall system remains observable and recoverable.

Yes, implement graceful degradation with visibility to keep services running when external dependencies partially fail, combining it with circuit breakers and structured error handling to maintain system stability and observability.