composable-functions-skill

Pattern

The composable functions pattern uses:

• Interfaces defining dependencies (data + side effects) and function contracts
• Pure functions that receive injected dependencies
• Mock factories for testing
• Adapters (RSC/Hooks) that wire up real dependencies

Workflow

1. Read the example structure in example/ to understand the patterns
2. Ask the user for the feature name
3. Generate minimal boilerplate in src/features/<feature-name>/ with:
   • entity/<feature>.interfaces.ts – dependency and function interfaces
   • functions/<feature>.functions.ts – pure functions with DI
   • functions/<feature>.functions.mock.ts – mock factory
   • functions/<feature>.functions.test.ts – test file
4. Ask the user what adapter type to create:
   • RSC (React Server Components) – default
   • React Hooks – default
   • Other (API, proxy-handler, etc.) – search codebase for examples, otherwise improvise
5. Generate the adapter in adapters/<feature>.<type>.adapter.ts

Do not implement business logic – generate bare minimum boilerplate only.