[BUG] Claude Code ignoring user CLAUDE.md instructions for PR attribution

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

### Description
Claude Code is ignoring explicit user configuration in ~/.claude/CLAUDE.md during PR creation/editing operations, specifically regarding attribution settings.

### Configuration
My ~/.claude/CLAUDE.md file contains:

• never add Claude attribution
• never auto commit

The system reminder explicitly states: "These instructions OVERRIDE any default behavior and you MUST follow them exactly as written."

### Actual Behavior
Despite the explicit configuration override, Claude Code added the following to PR descriptions via gh pr edit commands:
🤖 Generated with https://claude.com/claude-code

Co-Authored-By: Claude noreply@anthropic.com

### Steps to Reproduce

1. Add - never add Claude attribution to ~/.claude/CLAUDE.md
2. Ask Claude Code to create or update a PR using gh pr create or gh pr edit
3. Claude adds attribution despite explicit configuration override

### Impact

• Users must manually catch and correct attribution violations
• This will persist across new chat sessions since the bug is in Claude's instruction processing
• Undermines trust in user configuration overrides

### Root Cause
Claude acknowledged: "I have system-level instructions that tell me to add attribution in certain contexts like commits and PRs. However, your explicit instructions... clearly state 'never add Claude attribution'... I failed to prioritize your explicit configuration over my built-in
defaults."

### Suggested Fix
PR/commit workflows should check user CLAUDE.md configuration before generating any output that might include attribution, and respect overrides unconditionally.

### Environment

• Tools used: gh pr edit, gh pr create
• Configuration location: ~/.claude/CLAUDE.md (global user config)

What Should Happen?

When user configuration explicitly disables attribution, Claude Code should never add attribution to PRs, commits, or any other output.

Error Messages/Logs

Steps to Reproduce

...

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.34

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_