typed-service-contracts

You can build type-safe TypeScript services by defining Zod schemas for input and output in a spec file, then implementing the logic in a handler file. This enforces data integrity and separates contract definitions from implementation.

The Spec and Handler pattern separates service architecture into a spec file for defining input and output schemas, and a handler file for implementation logic. This enforces strict separation of concerns and type safety.

You can handle errors without throwing exceptions by implementing a Result Pattern within your TypeScript service architecture. This approach avoids exceptions and integrates with Zod schema validation for robust error handling.

Yes, Zod is a required dependency for utilizing this Spec and Handler architecture. It provides the core schema validation needed to ensure type safety and data integrity for both input parsing and output validation.

Yes, this service architecture explicitly supports CLI development alongside library development. The Spec and Handler pattern provides the strict input parsing and error handling required for robust command line interfaces.

The best way to separate contracts from logic is using the Spec and Handler pattern, placing Zod schema definitions in a spec file and the service logic in a handler file, ensuring type safety and separation of concerns.