error-handling

name	error-handling
description	Use when error-handling review checklist for typed errors, retry boundaries, user-safe messages, logging, API error envelopes, and swallowed exceptions. Use only when error paths are the task focus or code is at a high-risk boundary.

Error Handling Patterns

Adapted from ECC's error-handling skill (MIT).

Consistent, robust error handling patterns for production applications.

When to Activate

• Designing error types or exception hierarchies for a new module or service
• Adding retry logic or circuit breakers for unreliable external dependencies
• Reviewing API endpoints for missing error handling
• Implementing user-facing error messages and feedback
• Debugging cascading failures or silent error swallowing

See REFERENCE.md for typed error classes, Result pattern, API error handlers, React Error Boundaries, Python/FastAPI/Go examples, retry with backoff, and user-facing messages.

For security-specific error handling (info leakage, logging secrets), see security-review.