{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "gno://schemas/changes-follow-event@1.0",
  "title": "GNO Knowledge Changes Follow Line",
  "description": "One stdout line of `gno changes --follow --jsonl`: either a journal event with the cursor after it was applied, or the single terminal cursor-expiry record.",
  "oneOf": [
    { "$ref": "#/definitions/eventLine" },
    { "$ref": "#/definitions/expiredLine" }
  ],
  "definitions": {
    "eventLine": {
      "type": "object",
      "required": ["event", "postCursor"],
      "properties": {
        "event": { "$ref": "gno://schemas/changes@1.0#/definitions/change" },
        "postCursor": { "type": "string", "minLength": 1, "maxLength": 512 }
      },
      "additionalProperties": false
    },
    "expiredLine": {
      "type": "object",
      "required": ["error", "earliestCursor", "latestCursor"],
      "properties": {
        "error": { "type": "string", "const": "cursor_expired" },
        "earliestCursor": {
          "type": "string",
          "minLength": 1,
          "maxLength": 512
        },
        "latestCursor": { "type": "string", "minLength": 1, "maxLength": 512 }
      },
      "additionalProperties": false
    }
  }
}