[BUG] "git add && git commit" doesn't trigger co-author trailer

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.21 <!-- output of claude --version -->
• Operating System: NixOS 25.05 <!-- e.g. macOS 14.3, Windows 11, Ubuntu 22.04 -->
• Terminal: foot 1.22.3 <!-- e.g. iTerm2, Terminal App -->

Bug Description

git add . && git commit -m <commitmsg> doesn't get recognized as a commit command:

• asks for permission for git add
• execution doesn't trigger "Co-Authored By" suffix

Steps to Reproduce

1. ask claude to make a commit using this exact form (add && commit)
2. ???
3. profit

Expected Behavior

• co-author trailer in the commit message
• add & commit being treated as a commit command

Actual Behavior

• no trailer in the commit message
• permission prompt for git add pops up