Intent
Reduce coupling by isolating functionality into modules.
When to use
- Codebase is growing and needs structure.
- Multiple teams or tools share components.
- You want reusable building blocks.
Core mechanics
- Define module boundaries and interfaces.
- Enforce dependency rules.
- Test module contracts independently.
Implementation checklist
- Identify module responsibilities and owners.
- Define interfaces and shared contracts.
- Document dependency rules.
- Add integration tests for module boundaries.
- Review coupling and refactor regularly.
Failure modes and mitigations
- Hidden coupling -> enforce interface boundaries.
- Circular dependencies -> keep dependencies acyclic.
- Unclear ownership -> assign module owners.
Observability and validation
- Module dependency graph.
- Contract test coverage.
Artifacts
- Module architecture diagram.
- Interface documentation.