karabiner unicodes

{
  "title": "Unicode Keypad Processor",
  "rules": [
    {
      "description": "Unicode hex input with Option key",
      "manipulators": [
        // Handle Left Option key - convert and type on release
        {
          "type": "basic",
          "from": {
            "key_code": "left_option"
          },
          "to": [
            { "key_code": "vk_none" }
          ],
          "to_after_key_up": [
            {
              "shell_command": "if [ -f '/tmp/hex_sequence' ]; then hex_sequence=$(cat /tmp/hex_sequence); echo \"Processing hex: [$hex_sequence]\" >> /tmp/karabiner_debug.log; if [ -n \"$hex_sequence\" ]; then padded_hex=$(printf '%08s' \"$hex_sequence\" | tr ' ' '0'); printf \"\\\\U$padded_hex\" | pbcopy && osascript -e 'tell application \"System Events\" to keystroke (the clipboard as text)' && echo \"Typed Unicode for hex: $hex_sequence (padded: $padded_hex)\" >> /tmp/karabiner_debug.log; fi; fi"
            },
            { "shell_command": "rm -f /tmp/hex_sequence" }
          ],
          "conditions": [
            {
              "type": "device_if",
              "identifiers": [
                {
                  "vendor_id": 4617,
                  "product_id": 8721
                }
              ]
            }
          ]
        },

        // Hex digits 0-9
        {
          "type": "basic",
          "from": { "key_code": "0" },
          "to": [
            { "shell_command": "echo -n '0' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "1" },
          "to": [
            { "shell_command": "echo -n '1' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "2" },
          "to": [
            { "shell_command": "echo -n '2' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "3" },
          "to": [
            { "shell_command": "echo -n '3' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "4" },
          "to": [
            { "shell_command": "echo -n '4' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "5" },
          "to": [
            { "shell_command": "echo -n '5' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "6" },
          "to": [
            { "shell_command": "echo -n '6' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "7" },
          "to": [
            { "shell_command": "echo -n '7' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "8" },
          "to": [
            { "shell_command": "echo -n '8' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "9" },
          "to": [
            { "shell_command": "echo -n '9' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },

        // Hex letters a-f
        {
          "type": "basic",
          "from": { "key_code": "a" },
          "to": [
            { "shell_command": "echo -n 'a' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "b" },
          "to": [
            { "shell_command": "echo -n 'b' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "c" },
          "to": [
            { "shell_command": "echo -n 'c' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "d" },
          "to": [
            { "shell_command": "echo -n 'd' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "e" },
          "to": [
            { "shell_command": "echo -n 'e' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        },
        {
          "type": "basic",
          "from": { "key_code": "f" },
          "to": [
            { "shell_command": "echo -n 'f' >> /tmp/hex_sequence" }
          ],
          "conditions": [
            { "type": "device_if", "identifiers": [{ "vendor_id": 4617, "product_id": 8721 }] }
          ]
        }
      ]
    }
  ]
}