do-maintainability-check

To check code maintainability, run a final review verifying your changes avoid unnecessary complexity, duplication, and poor design decisions. This ensures the implementation remains easy to own, maintain, and evolve.

Unnecessary complexity in code design involves excessive abstractions or shared functions that make code harder to maintain. It is identified by checking changes for poor design decisions and unneeded structural overhead.

You need a final check for code maintainability when applying changes from Tier 1 to Tier 3, introducing or removing abstractions, adding helper functions, or modifying code used by multiple callers.

Yes, this maintainability check works for changes impacting multiple callers. It specifically evaluates shared functions and abstractions to ensure the smallest, most maintainable design is kept.

The best way to prevent poor design decisions when adding helper functions is to apply design discipline enforcing the smallest maintainable design, verifying new functions avoid duplication or unneeded complexity.