Emacs config and karabiner elements config

.emacs

(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(current-language-environment "UTF-8")
 '(indent-tabs-mode nil)
 '(inhibit-startup-screen t)
 '(mac-command-modifier 'super)
 '(mac-mouse-wheel-mode nil)
 '(mac-option-modifier 'meta)
 '(make-backup-files nil)
 '(package-selected-packages '(swift-mode company lsp-ui lsp-mode go-mode))
 '(show-trailing-whitespace t)
 '(tool-bar-mode nil)
 '(tooltip-mode nil)
 '(visible-bell t)
 '(xterm-mouse-mode t))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )

(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
;; Comment/uncomment this line to enable MELPA Stable if desired.  See `package-archive-priorities`
;; and `package-pinned-packages`. Most users will not need or want to do this.
;;(add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t)
(package-initialize)

(setq lsp-keymap-prefix "C-c l")

(remove-hook 'flymake-diagnostic-functions 'flymake-proc-legacy-flymake)

(setq-default fill-column 80)

(add-hook 'go-mode-hook
          (lambda ()
            (lsp-deferred)
            (setq tab-width 4)
            (add-hook 'before-save-hook #'lsp-format-buffer t t)
            (add-hook 'before-save-hook #'lsp-organize-imports t t)))

(add-hook 'ruby-mode-hook
          (lambda ()
            (lsp-deferred)))

(add-hook 'js-mode-hook
          (lambda ()
            (setq indent-tabs-mode nil)
            (setq js-indent-level 2)
            (lsp-deferred)))

(if (eq system-type 'darwin)
    (let ((path (replace-regexp-in-string
                 "[ \t\n]*$" ""
                 (shell-command-to-string "/bin/zsh -i -c 'echo $PATH'")))
          (gnu-tool-paths '("/opt/homebrew/opt/coreutils/libexec/gnubin"
                            "/opt/homebrew/opt/grep/libexec/gnubin"
                            "/opt/homebrew/opt/findutils/libexec/gnubin")))
      (setenv "PATH" (format "%s:%s" (string-join gnu-tool-paths ":") path))
      (setq exec-path (append
                       gnu-tool-paths
                       exec-path
                       (split-string path ":")))))

custom_rule.json

{
  "title": "Apple keyboard modifier customizations for built-in keyboards",
  "rules": [
    {
      "description": "Built-in keyboard customizations for Terminal and Emacs",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "left_command",
            "modifiers": {"optional": ["any"]}
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "key_code": "left_option"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_command"
              ]
            }
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "modifiers": [
                "left_option"
              ]
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "left_option",
            "modifiers": {"optional": ["any"]}
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "key_code": "left_command"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_option"
              ]
            }
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "modifiers": [
                "left_command"
              ]
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "right_command",
            "modifiers": {"optional": ["any"]}
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "key_code": "right_option"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "right_command"
              ]
            }
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "modifiers": [
                "right_option"
              ]
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "right_option",
            "modifiers": {"optional": ["any"]}
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "key_code": "right_control"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "right_option"
              ]
            }
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "^com\\.parallels\\.desktop\\.console$",
                "^com\\.apple\\.Terminal$",
                "^org\\.gnu\\.Emacs$"
              ]
            },
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "modifiers": [
                "right_control"
              ]
            }
          ]
        }
      ]
    },
    {
      "description": "Global built-in keyboard customizations",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "escape",
            "modifiers": {"optional": ["any"]}
          },
          "conditions": [
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "key_code": "caps_lock"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "caps_lock",
            "modifiers": {"optional": ["any"]}
          },
          "conditions": [
            {
              "type": "device_if",
              "identifiers": [
                {
                  "is_built_in_keyboard": true
                }
              ]
            }
          ],
          "to": [
            {
              "key_code": "escape"
            }
          ]
        }
      ]
    }
  ]
}

@jodoherty