esphome-docs/.github/workflows/matchers/ci-custom.json

{
    "problemMatcher": [
        {
            "owner": "ci-custom",
            "pattern": [
                {
                    "regexp": "^(.*):(\\d+):(\\d+):\\s+lint:\\s+(.*)$",
                    "file": 1,
                    "line": 2,
                    "column": 3,
                    "message": 4
                }
            ]
        }
    ]
}