{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://solid-schema.github.io/Tracker/index.json",
  "title": "Tracker",
  "description": "A container for tracking work items — typically a list of iCalendar Vtodos. The list-level counterpart to single-task Vtodo.",
  "type": "object",
  "x-urn-solid": {
    "term": "urn:solid:Tracker",
    "termRegistry": "https://urn-solid.com/Tracker/",
    "status": "stable",
    "added": "2026-04-19",
    "curatedBy": "claude-curate-next"
  },
  "properties": {
    "@id": {
      "type": "string"
    },
    "@type": {
      "oneOf": [
        { "type": "string", "enum": ["Tracker", "urn:solid:Tracker"] },
        { "type": "array", "items": { "type": "string" }, "contains": { "enum": ["Tracker", "urn:solid:Tracker"] } }
      ]
    },
    "title": {
      "description": "The Tracker's display name (e.g. \"Today\", \"Backlog\").",
      "type": "string",
      "minLength": 1,
      "maxLength": 200
    },
    "created": {
      "description": "When the Tracker was created (ISO 8601).",
      "type": "string",
      "format": "date-time"
    },
    "modified": {
      "description": "When the Tracker was most recently updated (ISO 8601).",
      "type": "string",
      "format": "date-time"
    },
    "initialState": {
      "description": "iCalendar status assigned to newly-created Vtodos in this Tracker (default: NEEDS-ACTION).",
      "type": "string",
      "enum": ["NEEDS-ACTION", "IN-PROCESS", "COMPLETED", "CANCELLED"]
    },
    "issue": {
      "description": "The Vtodos this Tracker contains. Each entry is a Vtodo (inline) or a reference (string/object @id).",
      "type": "array",
      "items": {
        "anyOf": [
          { "type": "string", "format": "uri" },
          { "$ref": "https://solid-schema.github.io/Vtodo/index.json" }
        ]
      }
    }
  },
  "required": ["@type"],
  "additionalProperties": true
}