CLAUDE_CODE_DISABLE_TERMINAL_TITLE=1 is not respected - terminal title still gets changed

Bug

The environment variable CLAUDE_CODE_DISABLE_TERMINAL_TITLE is set to 1, but Claude Code still overwrites the terminal window title while running.

Steps to Reproduce

1. Set CLAUDE_CODE_DISABLE_TERMINAL_TITLE=1 in your environment
2. Confirm it's set: echo $CLAUDE_CODE_DISABLE_TERMINAL_TITLE returns 1
3. Start a Claude Code session
4. Observe that the terminal title is still being changed

Expected Behavior

The terminal title should not be modified when CLAUDE_CODE_DISABLE_TERMINAL_TITLE=1 is set.

Actual Behavior

The terminal title is continuously overwritten during the session, and the user cannot reset it manually while Claude Code is running.

Environment

• Platform: macOS (Darwin 25.2.0)
• Claude Code install method: native