adv-codebase-design

Deep module design hides complex implementation details behind simple, high-leverage interfaces. It standardizes architectural design by ensuring modules are deep, interfaces are clean, and complex logic remains isolated to improve maintainability and testability.

Strategic seam identification determines exact boundary placement to allow for testing and future-proofing. By introducing ports and adapters at these seams, core business logic remains isolated from external infrastructure dependencies during refactoring.

Refactoring tightly coupled legacy services requires applying deep-module principles and seam-based dependency management. This isolates core business logic from external infrastructure dependencies by introducing ports and adapters at strategic boundaries.

Yes, the Design It Twice pattern uses parallel sub-agent workflows to explore and compare multiple architectural approaches before committing. This ensures the selected module design effectively deepens interfaces and strategically places seams.

Yes, this approach applies to refactoring, new feature design, and codebase hardening tasks. It enforces deep-module principles and seam-based dependency management to ensure maintainability and testability remain critical across evolving codebases.

A standardized vocabulary for module, interface, seam, and adapter ensures consistent engineering communication. Adherence to this defined glossary prevents common engineering failures caused by shallow, tightly coupled codebases that are difficult to evolve.