{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "sks.update-notice.v1",
  "type": "object",
  "required": ["schema", "checked_at", "package_name", "current_version", "latest_version", "update_available", "source", "cache_ttl_ms", "message"],
  "properties": {
    "schema": { "const": "sks.update-notice.v1" },
    "checked_at": { "type": "string" },
    "package_name": { "type": "string" },
    "current_version": { "type": "string" },
    "latest_version": { "type": ["string", "null"] },
    "update_available": { "type": "boolean" },
    "source": { "enum": ["npm-registry", "cache", "disabled", "error"] },
    "cache_ttl_ms": { "type": "number", "minimum": 1 },
    "message": { "type": "string" },
    "error": { "type": "string" }
  },
  "additionalProperties": true
}