typescript

Use runtime decoders like Zod or io-ts to validate external inputs at module boundaries, preventing unsafe runtime behavior. This establishes robust type safety by ensuring untrusted data matches expected domain types before processing.

Prevent cyclic dependencies in TypeScript by prescribing clear module structures with explicit boundaries and domain type modeling. Enforcing strict null checks and proper error handling reduces runtime errors and improves maintainability.

Validate boundary inputs across Node services and React components by applying robust decoders like Zod or io-ts at service edges. This enforces typed errors and prevents untrusted data from causing runtime exceptions in shared libraries.

Yes, this style guide applies to existing shared libraries, React apps, and Node services. It translates codebases into safer, more maintainable code by providing clear guidelines for domain type modeling, error handling, and module structure.

Use decoders instead of standard TypeScript interfaces when validating untrusted external inputs at system boundaries. Decoders provide runtime validation and typed errors, whereas standard interfaces only enforce compile-time type checks without runtime safety.