improve-codebase-architecture

To improve codebase testability with high coupling, you analyze the codebase to surface opportunities for deepening shallow modules. This isolates responsibilities and reduces coupling, producing a structured RFC-style design direction with proposed interfaces to guide refactoring.

A shallow module in software architecture is a component with unclear boundaries and high coupling that leads to brittle tests. Deepening these modules clarifies boundaries and isolates responsibilities, which enhances testability and long-term codebase maintainability.

To frame an RFC for a codebase refactor, you structure the problem space and design multiple interfaces to guide migrations. This produces a structured RFC-style design direction, including candidate surfaces, problem framing, and proposed interfaces for deepening module boundaries.

You need to refactor for modular design when a codebase exhibits architectural friction, high coupling, unclear boundaries, or brittle tests. Deepening shallow modules isolates responsibilities and reduces coupling, improving testability and long-term codebase maintainability.

Yes, this approach works for codebases with brittle tests by analyzing architectural friction to surface refactor opportunities. It isolates responsibilities and reduces coupling by deepening shallow modules, directly addressing test brittleness and improving long-term codebase maintainability.