{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "StepV3",
  "description": "One recorded user action — discriminated union by `op`.",
  "oneOf": [
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "cause",
        "id",
        "op",
        "result",
        "state",
        "to"
      ],
      "properties": {
        "cause": {
          "$ref": "#/definitions/NavigationCause"
        },
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "op": {
          "type": "string",
          "enum": [
            "navigate"
          ]
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        },
        "to": {
          "type": "string"
        }
      }
    },
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "id",
        "op",
        "result",
        "state",
        "target"
      ],
      "properties": {
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "op": {
          "type": "string",
          "enum": [
            "click"
          ]
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        },
        "target": {
          "$ref": "#/definitions/TargetDescriptorV3"
        }
      }
    },
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "id",
        "op",
        "result",
        "state",
        "target"
      ],
      "properties": {
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "op": {
          "type": "string",
          "enum": [
            "hover"
          ]
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        },
        "target": {
          "$ref": "#/definitions/TargetDescriptorV3"
        }
      }
    },
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "commit",
        "id",
        "op",
        "result",
        "state",
        "target",
        "value"
      ],
      "properties": {
        "commit": {
          "$ref": "#/definitions/FillCommit"
        },
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "op": {
          "type": "string",
          "enum": [
            "fill"
          ]
        },
        "redacted": {
          "type": "boolean"
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        },
        "target": {
          "$ref": "#/definitions/TargetDescriptorV3"
        },
        "value": {
          "type": "string"
        }
      }
    },
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "id",
        "op",
        "result",
        "state",
        "target"
      ],
      "properties": {
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "op": {
          "type": "string",
          "enum": [
            "select"
          ]
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "selection": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/SelectedOptionV3"
          }
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        },
        "target": {
          "$ref": "#/definitions/TargetDescriptorV3"
        }
      }
    },
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "id",
        "key",
        "op",
        "result",
        "state"
      ],
      "properties": {
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "key": {
          "type": "string"
        },
        "modifiers": {
          "type": [
            "array",
            "null"
          ],
          "items": {
            "$ref": "#/definitions/KeyModifier"
          }
        },
        "op": {
          "type": "string",
          "enum": [
            "press"
          ]
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        },
        "target": {
          "anyOf": [
            {
              "$ref": "#/definitions/TargetDescriptorV3"
            },
            {
              "type": "null"
            }
          ]
        }
      }
    },
    {
      "description": "Fields shared by every step variant (flattened in JSON).",
      "type": "object",
      "required": [
        "id",
        "op",
        "result",
        "state"
      ],
      "properties": {
        "id": {
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "op": {
          "type": "string",
          "enum": [
            "scroll"
          ]
        },
        "result": {
          "$ref": "#/definitions/StepResultV3"
        },
        "state": {
          "description": "Observation id immediately before this action.",
          "type": "string"
        }
      }
    }
  ],
  "definitions": {
    "FillCommit": {
      "type": "string",
      "enum": [
        "enter",
        "suggestion",
        "blur"
      ]
    },
    "KeyModifier": {
      "description": "Keyboard modifier flags. Multiple flags may be combined; the extension folds them into CDP's bitfield (`alt=1, ctrl=2, meta=4, shift=8`).",
      "type": "string",
      "enum": [
        "alt",
        "ctrl",
        "meta",
        "shift"
      ]
    },
    "NavigationCause": {
      "type": "string",
      "enum": [
        "user_typed",
        "link",
        "form_submit",
        "reload",
        "history",
        "script",
        "browser"
      ]
    },
    "SelectedOptionV3": {
      "description": "One selected option (`select` op).",
      "type": "object",
      "required": [
        "value"
      ],
      "properties": {
        "label": {
          "type": [
            "string",
            "null"
          ]
        },
        "value": {
          "type": "string"
        }
      }
    },
    "StepResultV3": {
      "type": "object",
      "required": [
        "state"
      ],
      "properties": {
        "state": {
          "type": "string"
        }
      }
    },
    "TargetDescriptorV3": {
      "description": "Stable semantic handle for an interacted element within a page observation.",
      "type": "object",
      "properties": {
        "ctx": {
          "type": [
            "string",
            "null"
          ]
        },
        "name": {
          "type": [
            "string",
            "null"
          ]
        },
        "ref": {
          "type": [
            "string",
            "null"
          ]
        },
        "role": {
          "type": [
            "string",
            "null"
          ]
        },
        "unmatched": {
          "type": "boolean"
        }
      }
    }
  }
}