type-boundary-patterns

Parse vendor data at the boundary using Schema.decodeUnknown to enforce runtime validation before deriving internal types. This prevents unsafe type assertions from leaking unvalidated values into your application.

Define explicit schemas for external data and decode at integration points using boundary parsing. This catches mismatches early and maps errors consistently, ensuring only validated data enters your type system.

Use Schema.DateFromSelf to handle Date parsing at the boundary. This validates incoming date data before it reaches your internal logic, preventing runtime assertion failures.

Parse at vendor boundaries whenever integrating external APIs or $Infer-bound data sources. Boundary parsing catches invalid data immediately, prevents type pollution, and centralizes validation logic.

Yes. Define separate schemas for each vendor's data format, then apply Schema.decodeUnknown at each integration point. This isolates vendor-specific validation and prevents cross-vendor type contamination.

Schema.decodeUnknown returns typed error output with consistent, mapped error messages. This gives you predictable, actionable feedback without crashing, letting you handle invalid data gracefully.