{
  "$defs": {
    "MetricSeries": {
      "description": "Summary of one metric series (key + labels) of a run; the newest attempt that logged it.",
      "examples": [
        {
          "attempt": 1,
          "count": 1400,
          "first_ts": "2026-10-15T09:30:00Z",
          "key": "step_size",
          "labels": {
            "chain": "0"
          },
          "last": 0.31,
          "last_step": 1400,
          "last_ts": "2026-10-15T09:31:00Z",
          "max": 1.2,
          "min": 0.02
        },
        {
          "attempt": 1,
          "count": 1,
          "first_ts": "2026-10-15T09:30:00Z",
          "key": "rmse",
          "last": 12.7,
          "last_step": null,
          "last_ts": "2026-10-15T09:30:00Z",
          "max": 12.7,
          "min": 12.7
        }
      ],
      "properties": {
        "attempt": {
          "minimum": 1,
          "title": "Attempt",
          "type": "integer"
        },
        "count": {
          "description": "Stored points",
          "minimum": 0,
          "title": "Count",
          "type": "integer"
        },
        "first_ts": {
          "format": "date-time",
          "title": "First Ts",
          "type": "string"
        },
        "key": {
          "pattern": "^[a-z][a-z0-9_]{0,63}$",
          "title": "Key",
          "type": "string"
        },
        "labels": {
          "additionalProperties": {
            "type": "string"
          },
          "title": "Labels",
          "type": "object"
        },
        "last": {
          "description": "Value of the newest point (by time, then step)",
          "title": "Last",
          "type": "number"
        },
        "last_step": {
          "anyOf": [
            {
              "type": "integer"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Step of the newest point; null for a scalar",
          "title": "Last Step"
        },
        "last_ts": {
          "format": "date-time",
          "title": "Last Ts",
          "type": "string"
        },
        "max": {
          "title": "Max",
          "type": "number"
        },
        "min": {
          "title": "Min",
          "type": "number"
        }
      },
      "required": [
        "key",
        "attempt",
        "count",
        "last",
        "min",
        "max",
        "first_ts",
        "last_ts"
      ],
      "title": "MetricSeries",
      "type": "object"
    }
  },
  "$id": "https://schemas.mapi.dev/v1/api-TrackingFrame.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "description": "Data of the SSE ``tracking`` frame: the series that changed since the last frame, and\nwhether params, tags or (v0.14) media changed (fetch them again).",
  "examples": [
    {
      "params": true,
      "run_id": "run_01jaf3q2x8m9v7k5h4g3f2e1d0",
      "series": [
        {
          "attempt": 1,
          "count": 1400,
          "first_ts": "2026-10-15T09:30:00Z",
          "key": "step_size",
          "labels": {
            "chain": "0"
          },
          "last": 0.31,
          "last_step": 1400,
          "last_ts": "2026-10-15T09:31:00Z",
          "max": 1.2,
          "min": 0.02
        }
      ]
    }
  ],
  "properties": {
    "media": {
      "default": false,
      "description": "Media changed since the last frame (v0.14)",
      "title": "Media",
      "type": "boolean"
    },
    "params": {
      "default": false,
      "title": "Params",
      "type": "boolean"
    },
    "run_id": {
      "examples": [
        "run_01jaf3q2x8m9v7k5h4g3f2e1d0"
      ],
      "pattern": "^[A-Za-z0-9][A-Za-z0-9_.\\-]{0,127}$",
      "title": "Run Id",
      "type": "string"
    },
    "series": {
      "items": {
        "$ref": "#/$defs/MetricSeries"
      },
      "maxItems": 200,
      "title": "Series",
      "type": "array"
    },
    "tags": {
      "default": false,
      "title": "Tags",
      "type": "boolean"
    }
  },
  "required": [
    "run_id"
  ],
  "title": "TrackingFrame",
  "type": "object",
  "x-mapi-contract-version": "0.2"
}