includeCoAuthoredBy: false setting not respected

[aliwatters]

Description

The includeCoAuthoredBy: false and gitAttribution: false settings in ~/.claude/settings.json are not being respected. Commits made by Claude Code still include the attribution trailers:

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Configuration

// ~/.claude/settings.json
{
  "model": "claude-opus-4-5-20251101",
  "includeCoAuthoredBy": false,
  "gitAttribution": false,
  // ... other settings
}

Expected Behavior

When includeCoAuthoredBy: false is set, commit messages should NOT include:

• 🤖 Generated with [Claude Code](...)
• Co-Authored-By: Claude ...

Actual Behavior

The trailers are still added to every commit, regardless of the setting.

Workaround

Added a commit-msg git hook to strip the trailers:

#!/usr/bin/env bash
sed -i '' '/^🤖 Generated with \[Claude Code\]/d' "$1"
sed -i '' '/^Co-Authored-By: Claude/d' "$1"

Environment

• Claude Code version: Latest (Dec 2025)
• OS: macOS Darwin 25.1.0
• Model: claude-opus-4-5-20251101

[aliwatters]

Additional context: This is particularly important for teams where not everyone uses AI assistants. The attribution trailers can cause friction with team members who prefer commits to look "normal." Having the setting work correctly would help with adoption by allowing users to choose whether to advertise their tooling.

[github-actions]

Found 3 possible duplicate issues:

1. includeCoAuthoredBy: false setting not respected - keeps adding co-author credits #7543
2. Ignore User Configuration: Co-Authored-By Lines Added Despite includeCoAuthoredBy: false #4287
3. Claude Code not respecting includeCoAuthoredBy: false setting in commits #6848

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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically closed as a duplicate of #7543.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.