{
  "lexicon": 1,
  "id": "sh.tangled.pijul.refUpdate",
  "defs": {
    "main": {
      "type": "record",
      "description": "Pijul reference update event - emitted when changes are pushed to a channel",
      "key": "tid",
      "record": {
        "type": "object",
        "required": ["repo", "channel", "newState", "changes"],
        "properties": {
          "repo": {
            "type": "string",
            "description": "Repository identifier"
          },
          "channel": {
            "type": "string",
            "description": "Channel that was updated"
          },
          "oldState": {
            "type": "string",
            "description": "Previous Merkle hash (empty for new channels)"
          },
          "newState": {
            "type": "string",
            "description": "New Merkle hash after update"
          },
          "changes": {
            "type": "array",
            "items": {
              "type": "string"
            },
            "description": "List of change hashes that were applied"
          },
          "languages": {
            "type": "object",
            "description": "Map of language name to lines of code"
          }
        }
      }
    }
  }
}