{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/petal-labs/petalflow/schemas/graph-workflow/v1.json",
  "title": "PetalFlow Graph Workflow v1",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "id",
    "version",
    "schema_version",
    "kind",
    "nodes",
    "edges"
  ],
  "properties": {
    "id": {
      "type": "string",
      "minLength": 1
    },
    "version": {
      "type": "string",
      "description": "Workflow business version."
    },
    "schema_version": {
      "type": "string",
      "description": "Schema contract version (SemVer).",
      "pattern": "^(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(?:-(?:0|[1-9][0-9]*|[0-9A-Za-z-]*[A-Za-z-][0-9A-Za-z-]*)(?:\\.(?:0|[1-9][0-9]*|[0-9A-Za-z-]*[A-Za-z-][0-9A-Za-z-]*))*)?(?:\\+[0-9A-Za-z-]+(?:\\.[0-9A-Za-z-]+)*)?$"
    },
    "kind": {
      "type": "string",
      "const": "graph"
    },
    "metadata": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      }
    },
    "nodes": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/node"
      }
    },
    "edges": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/edge"
      }
    },
    "entry": {
      "type": "string"
    }
  },
  "$defs": {
    "node": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "id",
        "type"
      ],
      "properties": {
        "id": {
          "type": "string",
          "minLength": 1
        },
        "type": {
          "type": "string",
          "minLength": 1
        },
        "config": {
          "type": "object",
          "additionalProperties": true
        }
      }
    },
    "edge": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "source",
        "sourceHandle",
        "target",
        "targetHandle"
      ],
      "properties": {
        "source": {
          "type": "string",
          "minLength": 1
        },
        "sourceHandle": {
          "type": "string",
          "minLength": 1
        },
        "target": {
          "type": "string",
          "minLength": 1
        },
        "targetHandle": {
          "type": "string",
          "minLength": 1
        }
      }
    }
  }
}