{
  "version": "21.0.0",
  "generated": "2026-07-31",
  "storage": {
    "notebookKey": "bt21-research-notebook",
    "timelineKey": "bt21-custom-timelines",
    "progressKey": "bt21-storyline-progress",
    "settingsKey": "bt21-workspace-settings",
    "schemaVersion": 1
  },
  "shareState": {
    "supported": [
      "view",
      "storyline",
      "step",
      "mode",
      "compare",
      "year",
      "model"
    ],
    "note": "Notebook text and private local notes are never encoded into shared URLs."
  },
  "notebookRecord": {
    "id": "uuid",
    "collection": "string",
    "kind": "entity|event|passage|note",
    "canonicalId": "optional string",
    "title": "string",
    "note": "string",
    "tags": [
      "string"
    ],
    "created": "ISO date",
    "updated": "ISO date"
  },
  "customTimeline": {
    "id": "uuid",
    "title": "string",
    "description": "string",
    "eventIds": [
      "event id"
    ],
    "annotations": {
      "event-id": "string"
    },
    "created": "ISO date",
    "updated": "ISO date"
  }
}