karabiner elements

terminal.json

{
  "title": "CTRL <=> CMD except Terminal and Emacs",
  "rules": [
    {
      "description": "Swap ctrl and command except Terminal and Emacs",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "left_control",
            "modifiers": {
              "optional": [
                "any"
              ]
            }
          },
          "to": [
            {
              "key_code": "left_command"
            }
          ],
          "conditions": [
            {
              "type": "frontmost_application_unless",
              "bundle_identifiers": [
                  "Terminal",
		  "org.gnu.Emacs"
              ]
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "left_command",
            "modifiers": {
              "optional": [
                "any"
              ]
            }
          },
          "to": [
            {
              "key_code": "left_control"
            }
          ],
          "conditions": [
            {
              "type": "frontmost_application_unless",
              "bundle_identifiers": [
                  "Terminal",
		  "org.gnu.Emacs"
              ]
            }
          ]
        }   
      ]
    }
  ]
}

~/.config/karabiner/assets/complex_modifications/terminal.json