Go Error Handling

Compatibility: errors.Is, errors.As, and %w wrapping require Go 1.13+; structured logging examples may use log/slog from Go 1.21+.

Resource Routing

• scripts/check-errors.sh - Run when checking string-based error matching, bare error propagation, and log-and-return patterns.
• scripts/check-errors-ast.go - Implementation helper invoked by check-errors.sh; patch this when changing error-flow analysis behavior.
• references/ERROR-FLOW.md - Read when deciding where to handle, wrap, log, or return errors.
• references/ERROR-TYPES.md - Read when choosing sentinel errors, typed errors, or opaque errors.
• references/WRAPPING.md - Read when choosing %w versus %v or crossing package boundaries.

In Go, errors are values — they are created by code and consumed by code.

Choosing an Error Strategy