Remove or customize the Co-Authored-By trailer Claude Code adds to commits with the attribution setting

When Claude Code makes a commit, it appends a trailer such as Co-Authored-By: Claude <noreply@anthropic.com>, and pull request descriptions get a "Generated with Claude Code" line. Plenty of teams want a different signature, or none at all.

In short: the attribution key in settings.json lets you change or hide the commit trailer (commit), the PR line (pr), and the session link (sessionUrl) independently.

The shape of attribution

attribution is an object: commit and pr are strings, sessionUrl is a Boolean. It can live in any settings file.

Sub-key	Type	Default when unset	Meaning
commit	string	a git trailer such as Co-Authored-By	the trailer appended to commit messages
pr	string	the standard attribution text	the line added to PR descriptions
sessionUrl	Boolean	true	the claude.ai session link on cloud and Remote Control commits

Hiding everything

This removes the commit trailer and the PR line and omits the session link.

{
  "attribution": {
    "commit": "",
    "pr": "",
    "sessionUrl": false
  }
}

An empty string hides commit or pr. If you set only one, the other keeps its default text.

Using your own trailer

The official example replaces the commit attribution, removes the PR attribution, and drops the session link.

{
  "attribution": {
    "commit": "Generated with AI\n\nCo-Authored-By: AI <ai@example.com>",
    "pr": "",
    "sessionUrl": false
  }
}

Line breaks inside commit are written as JSON \n. Lines you want treated as trailers should follow a blank line and use the Key: value form, as in the example.

For a team-wide standard, commit the setting in .claude/settings.json. For a personal preference, use ~/.claude/settings.json. The settings layers are explained in Designing permissions in settings.json.

Relationship to includeCoAuthoredBy

includeCoAuthoredBy: false used to remove both the trailer and the PR line. The key was deprecated in v2.0.62, replaced by attribution.

State	Behavior
an older file with only includeCoAuthoredBy: false	still honored; both trailer and PR line are omitted
attribution.commit or attribution.pr set	includeCoAuthoredBy is ignored, and whichever of the two you left unset uses its default text
includeCoAuthoredBy: true	same as unset

For new configuration, use attribution and remove includeCoAuthoredBy so the two cannot combine in unexpected ways. A related key, includeGitInstructions: false, removes the built-in commit and PR instructions from the system prompt altogether. For running Claude Code in automation where these settings matter most, see Running Claude Code headless in CI.

Summary

• attribution controls commit (trailer), pr (PR line), and sessionUrl (session link) separately
• To hide everything, set commit and pr to empty strings and sessionUrl to false
• To replace, put any string in commit, with \n for line breaks and Key: value trailers
• includeCoAuthoredBy is deprecated since v2.0.62 and ignored once attribution is set
• Check the project's AI disclosure policy before removing attribution