Map Left-Control+Open-Bracket to Escape (Karabiner-Elements)

map_lctrl_plus_open_bracket_to_esc.json

{
  "title": "Map Left-Control+Open-Bracket to Escape",
  "rules": [
    {
      "manipulators": [
        {
          "description": "Bracket Rule [left_control + open_bracket]",
          "type": "basic",
          "from": {
            "key_code": "open_bracket",
            "modifiers": {
              "mandatory": [
                "left_control"
              ],
              "optional": [
                "caps_lock"
              ]
            }
          },
          "to": [
            {
              "key_code": "escape"
            }
          ]
        }
      ]
    }
  ]
}