10 · Version Control
Commit
A saved snapshot of changes
A recorded snapshot of a selected set of changes, with metadata and a message. It is a useful recovery and review point, but only for content actually committed.
Concrete example
An agent fixes a bug and commits it with the message “fix login error” — a point you can always come back to.
Why it matters
The undo points of a project; good commit messages are the story of how it was built.