Module error 

The Katra error model.

Errors are categories, not strings. Every failure mode maps to one category so that policy code (fallback, promotion gates, budgets) can switch on the category without parsing messages.

See docs/standards/error-model.md for the full policy.

Enums

ErrorCategory

Coarse error category. Policy decisions must only depend on this, never on the human-readable message.

KatraError

The unified Katra error type.

Type Aliases

Result

Result alias used across Katra3D.