improve-codebase-architecture

To improve testability, you identify shallow modules by analyzing the codebase for architectural friction where surface area is large relative to functionality. This surfaces opportunities to deepen module boundaries and isolate complex logic for safer refactoring.

Architectural friction in software design occurs when shallow modules leak implementation details, hindering modularity and testability. It impacts codebases by making boundary-based tests difficult to plan and increasing the risk during structural refactors.

You define module boundaries by surfacing design friction and outlining boundary contracts. The process generates actionable RFC-style proposals and migration notes, detailing required tests and a defined interface to guide teams through deepening the module.

Yes, you can generate a test strategy for existing code by planning boundary-based tests around newly deepened modules. It outlines required tests and migration notes to ensure safer refactors when defining module boundary contracts.

You should refactor shallow modules when targeted architectural improvements can resolve testability issues without a full rewrite. This approach applies to real-world scenarios like defining boundary contracts and generating actionable migration notes for incremental changes.