🔄 Complete the consequences of a change

Complete the consequences of the accepted change across affected code and supporting artifacts, including places outside the initially edited files. Preserve unrelated pre-existing issues. Apply this procedure again to follow-up changes, regardless of where the requirement originated.

1. Establish before and after. Identify the branch's starting point: the most recent commit shared with the branch it will merge into, unless a comparison commit was supplied. Compare it with the current state, including uncommitted work. State what behavior, meaning, or contract changes and identify the intended-use entry points. These may be application entry points, end-to-end scenarios, or library consumers. Distinguish consequences of this branch from pre-existing issues, even within edited files.
2. Follow relationships in both directions. Inspect consumers needing adaptation and dependencies that may become unnecessary, including functions inside still-used modules. Follow representations of the same concept: names, assertions, fixtures, configuration, documentation, and examples. These are search directions, not an exhaustive checklist. Trace assumptions and equivalent meanings even when their names differ; inspect occurrences rather than relying on text matches or reference counts.
3. Decide from purpose and evidence. Ask whether each affected element still serves a supported purpose and accurately expresses the intended behavior. Update inaccurate representations, including test names after assertion changes. Remove newly unnecessary implementation together with obsolete tests and dependencies. Unit-test callers alone do not establish a continuing intended use. Check supported external interfaces, framework discovery, test infrastructure, intentional historical references, and required compatibility before changing or removing them.
4. Repeat after consequential edits. Removing one element can make its callers, tests, imports, fixtures, or configuration obsolete. Continue until another pass identifies no unresolved consequences. Report uncertainty about dynamic or external usage rather than inventing a reason to retain or delete something. Keep the review within the change's causal scope.
5. Verify behavior and completeness separately. Run applicable checks, then review the complete branch diff and affected relationships for superseded assumptions. Passing tests, remaining references, or a clean search alone do not establish completeness. Briefly report consequential updates beyond the initial edit and any remaining uncertainty; limit coverage claims to what was actually inspected.