To use Backtick key to Esc key for Macbook touchbar Vim users

backtick-to-esc-karabiner.json

{
	"title": "backtick-to-esc.json",
	"rules": [
		{
			"description": "Escape if backtick is pressed alone; post backtick if Command+Shift+backtick is pressed.",
			"manipulators": [
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"shift",
								"command"
							],
							"optional": [
								"caps_lock"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"fn"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"control",
								"command"
							],
							"optional": [
								"caps_lock"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"vk_none"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"left_command"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"left_command"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"right_command"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"right_command"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"left_option"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"left_option"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"right_option"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"right_option"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"left_control"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"left_control"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde",
						"modifiers": {
							"mandatory": [
								"fn"
							],
							"optional": [
								"caps_lock"
							]
						}
					},
					"to": [
						{
							"key_code": "grave_accent_and_tilde",
							"modifiers": [
								"vk_none"
							]
						}
					]
				},
				{
					"type": "basic",
					"from": {
						"key_code": "grave_accent_and_tilde"
					},
					"to": [
						{
							"key_code": "escape"
						}
					]
				}
			]
		}
	]
}