Once you save and close the file, Git reads the content, strips out the comments, and uses the remaining text as the permanent message for that commit. The Role of COMMIT_EDITMSG in Best Practices

Using git commit -m "message" bypasses the creation of this file entirely, which is efficient for small fixes but discouraged for complex features that require detailed documentation [5.6]. Customizing the Experience

It populates it with a template or existing comments (lines starting with # ). It opens your configured core editor .

The existence of this file encourages developers to move away from "one-liner" commits and toward the industry-standard . According to many commit message guides , a well-structured message should have:

When you execute git commit , Git performs several background tasks: It creates the COMMIT_EDITMSG file.

If you close the COMMIT_EDITMSG file without adding any text (or if you delete the existing text), Git will abort the commit, assuming you changed your mind [5.5].

A concise summary (max 50 characters) followed by a blank line.