[FEATURE] Add setting to disable Co-Authored-By attribution in commits

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Feature Request: Optional Co-Authored-By Attribution

Problem:
Currently, Claude Code automatically adds Co-Authored-By: Claude <model> <email>
to all commits it creates. There is no way to disable this behavior.

Proposed Solution

Requested Feature:
Add a user-configurable setting to disable Co-Authored-By attribution in commits.

Proposed Solution:
Add a setting in Claude Code configuration:

• Location: Settings > Git (or similar)
• Setting name: "Include Co-Authored-By attribution in commits"
• Type: Toggle/Checkbox (default: ON)

Alternative Solutions

Current Workaround:
Users must either:

1. Manually rewrite Git history after each commit
2. Create custom Git hooks to strip attribution
3. Make commits manually instead of using Claude Code

Expected Behavior:
When disabled, commits created by Claude Code should not include
the Co-Authored-By trailer.

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

Use Case:

• Personal projects where attribution is not desired
• Organizational policies that don't permit this format
• Users who prefer clean commit messages
• Portfolio projects on GitHub

Additional Context

Additional Context:
This should be transparent and easily discoverable, similar to how
other Git-related settings are configured in modern IDEs.