incremental-implementation

Ship large refactoring changes incrementally by breaking them into thin vertical slices that each compile and pass tests. This keeps the codebase working and testable at every step, enforcing build checks, descriptive commits, and rollback-friendly migrations.

Vertical slicing implements one end-to-end piece of functionality at a time across database, API, and UI layers. Each working slice passes continuous integration independently, reducing risk and simplifying code reviews for multi-file features.

Use feature flags to merge incomplete backend and frontend work safely while keeping it disabled in production. This rollback-friendly discipline ensures each incremental slice compiles and passes CI without exposing unfinished functionality.

Maintain commit discipline by writing descriptive messages for each minimal vertical slice. Every commit must pass tests, build checks, and type checking, ensuring continuous integration remains green throughout the incremental implementation.

Use incremental implementation when building a new CRUD feature across backend and frontend. Ship the database schema, API, and UI as separate, tested slices to reduce integration risk, maintain a buildable state, and simplify rollback.

Large, multi-file changes implemented in one pass become risky, difficult to test, and hard to revert. Without incremental slicing, the system cannot maintain a working or testable state at every step, complicating continuous integration and code reviews.