Just an FYI to several of the posters here.

You CAN set these as env vars in your shell, but I prefer to stick 'em in the Claude settings.json:

  $ cat ~/.claude/settings.json
  {
    "env": {
      "CLAUDE_CODE_DISABLE_TERMINAL_TITLE": "1",
      "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": "1"
    }
  }

This keeps your main environment from getting cluttered.