AIContextItem

Per-document metadata for the current-document context item.

Each entry corresponds to a single root and produces one { type: 'document' } request entry when the context item is serialized to API request data. Single-root setups use an array with one entry — there is no scalar single-document fallback.

For type: 'document' context items, this array is the source of truth; the base content, id, and selection fields are ignored.