includeCoAuthoredBy: false setting not respected - keeps adding co-author credits

Bug Report

The includeCoAuthoredBy: false setting in ~/.claude/settings.local.json is not being respected. Claude Code continues to add co-author credits and "Generated with Claude Code" footers to commits despite explicit configuration to disable this.

Configuration

~/.claude/settings.local.json:

{
  "includeCoAuthoredBy": false
}

Project CLAUDE.md (first line):

**NEVER ADD CLAUDE CO-AUTHOR CREDITS OR "GENERATED WITH CLAUDE CODE" FOOTERS**

Expected Behavior

No co-author credits or attribution should be added to commits when includeCoAuthoredBy is set to false.

Actual Behavior

Claude Code continues attempting to add:

• Co-Authored-By: Claude <noreply@anthropic.com>
• 🤖 Generated with [Claude Code](https://claude.ai/code) footers

Impact

This happens every session despite explicit user configuration, causing frustration and requiring manual intervention to prevent unwanted attribution.

Reproduction

1. Set "includeCoAuthoredBy": false in settings
2. Add explicit instructions in project CLAUDE.md
3. Ask Claude to make commits
4. Observe it still tries to add co-author credits