Every commit must have a descriptive title and a substantive body. Title-only

commit messages are not acceptable.

The body must explain the problem or motivation, what changed, and why the

chosen approach addresses it. Include relevant behavior before and after the

change, design decisions, limitations, and validation results. Scale the detail

to the change; do not add boilerplate or claim checks that were not run.

Commit messages must stand on their own. Put the information needed to understand

and review the change in the commit body, even when it also appears in a pull

request description. PR and issue links may provide additional context, but must

not substitute for that explanation.