How to Write Git Commit Messages with AI

A commit message is a compact record of what changed and why. AI can summarize a diff into a candidate subject and body, which is useful when a patch contains several related edits. But the diff may not reveal motivation, alternatives considered, issue references or future constraints. A message that confidently invents intent can mislead later maintainers. Inspect the staged diff first. The staged-diff command shows content prepared for the next commit; do not ask an assistant to summarize a broad working tree if unrelated edits are mixed in. Provide a short human-written note about the problem and intended effect, plus the repository’s message convention. Ask the model to distinguish facts visible in the diff from context supplied by the developer, and to leave out anything unsupported. Git documentation notes that text before the first blank line is treated as the commit title and suggests a short summary line followed by a blank line and a fuller description. Teams may adopt a stricter format such as Conventional Commits, but local contribution rules take precedence. A useful subject is specific and readable in history; the body can explain why the change was made, important tradeoffs and testing. Avoid a message that merely says “updates files” or exaggerates impact. Review the proposed message against the staged patch and ticket. Confirm the scope, tense, issue identifier, breaking-change note and test claims. Never let AI run a commit or amend one without your deliberate review of exactly what is staged and what message will be recorded. A commit message does not replace a useful pull-request description. Treat generated text as an editable summary, with the author responsible for accuracy.