core/.github/workflows/matchers/mypy.json

{
  "problemMatcher": [
    {
      "owner": "mypy",
      "pattern": [
        {
          "regexp": "^(.+):(\\d+):\\s(error|warning):\\s(.+)$",
          "file": 1,
          "line": 2,
          "severity": 3,
          "message": 4
        }
      ]
    }
  ]
}