Best Practices

Patterns and tips for building production Katman APIs.

Patterns that work well in real Katman projects.

Unit test procedures with callable(), integration test with createServerClient(), HTTP test with handler().

Share types between frontend and backend with the contract-first pattern.

Prevent refetch waterfalls with server-side prefetching and hydration.

AI SDK

Turn Katman procedures into AI tools — LLMs call your API through function calling.

Testing & Mocking

Test Katman procedures without starting a server.