improve-codebase-architecture

A shallow module handles limited complexity and often has an interface as complex as its implementation. Refactoring shallow modules into deep modules hides complexity behind a simple interface, improving testability and AI navigability.

To refactor a complex module for better testability, identify shallow modules in your codebase and consolidate multiple dependencies into a single deep module, guided by interface design and testing strategies.

You need to deepen codebase modules when facing complex software engineering scenarios involving multiple dependencies, poor testability, and high maintenance costs, aiming to reduce complexity by hiding implementation details behind simpler interfaces.

Analyzing codebase architecture requires domain language understanding from a CONTEXT.md file and architecture guidelines from docs/adr/ to accurately identify shallow modules and propose effective refactoring strategies.

Deep module interface design improves AI navigability by reducing surface complexity and consolidating multiple dependencies. This simplifies the interaction layer, enabling AI tools to parse and navigate the codebase architecture more effectively.

Refactoring into deep modules requires pre-existing domain language context and architecture decision records. Without accurate domain understanding, proposed deepening opportunities may misrepresent system logic and fail to improve testability.