[BUG] Resumed worktree session does not trigger WorktreeRemove on exit

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report
• [x] I am using Claude Code 2.1.76

What's Wrong?

Fresh --worktree sessions clean up correctly on /exit. However, when a session is resumed after the terminal was closed, WorktreeRemove hook is not invoked on exit. The worktree and branch are orphaned.

Reproduction

# 1. Start a worktree session
claude --worktree my-feature    # WorktreeCreate fires, worktree created
# ... work, commit, push to main

# 2. Close terminal window — session killed without /exit

# 3. Resume and exit
cd <worktree-path>
claude --resume                 # Resume the interrupted session
/exit                           # WorktreeRemove does NOT fire

Worktree directory and branch persist after exit. git worktree list still shows the orphaned worktree.

Expected

/exit on a resumed worktree session should invoke WorktreeRemove and clean up the worktree, same as a non-interrupted session.

Environment

• Claude Code 2.1.76
• macOS 15.5, Ghostty 1.3.0
• Custom WorktreeCreate/WorktreeRemove hooks in .claude/settings.json