spec-writer

To design Python interfaces before implementation, you can define strict typing contracts and expected behavior using Protocol definitions and .pyi stub files. This enforces clear module boundaries without writing actual implementation logic.

The best way to define contracts between Python modules is by generating granular typing.Protocol definitions. This establishes clear boundaries and documents expected behavior between interacting components like services and business logic layers.

Yes, you can generate .pyi stub files for Python Protocols. The process creates granular stub files with strict typing that enforce no implementation logic, adhering to a specific file structure and initialization exports.

You use typing.Protocol to define component boundaries by creating interface definitions that specify expected methods and attributes. This documents the contract for new components prior to writing the actual implementation code.

Yes, strict typing in Python stub files prevents implementation logic. The generated .pyi files enforce a contract design approach that strictly separates interface definitions from the actual code logic.

You need to create Python stub files for contract design when starting a new feature that requires interaction between different modules. This allows you to document expected behavior and define typing Protocols prior to implementation.