| message | Yes | Your message to the AI assistant. | |
| user_id | No | User identifier. Automatically set from authentication — typically omit this. | |
| window_id | No | Optional identifier for the client window (set by the web app) so concurrent edits from two windows of the same chat are merged rather than overwritten. Agents/API may omit. | |
| async_mode | No | Must be true for async processing. Included for backward compatibility. | |
| model_tier | No | AI model to use: 'core' (default, fast), 'turbo' (fastest), 'pro' (advanced reasoning), 'max' (most capable). | |
| session_id | Yes | Unique session identifier. Reuse to continue a conversation. | |
| document_id | No | Target a specific open document by id (ids come from /v1/sessions/{session_id}/documents). Omit to target the focused document (default — unchanged single-document behaviour). When set, that document becomes the focus for this turn. | |
| approval_mode | No | Change review mode: 'approve_all' (default, auto-applies changes) or 'ask_every_time' (pauses for your review). | |
| authorization | No | | |
| document_html | No | Current document HTML. OMIT this when the session already holds the document — the server persists it across turns, so you don't re-send it every turn; pass it only to load new content or replace the document wholesale (a verbatim load — the AI never re-types content passed here). Include data-chunk-id attributes on elements to enable targeted AI edits. | |
| response_mode | No | Response shape control. 'full' (default) puts the complete updated document HTML in the job result — required by web app editors and recommended for small documents. 'compact' (recommended for AI agents editing large documents) suppresses the full HTML and stores only per-section diffs (chunk_diffs), saving thousands of tokens when polling get_job. To read sections in compact mode, send a natural-language request to chat ('show me the pricing section') — the AI returns the content in the reply text. | full |
| cursor_context | No | Editor cursor context at message time, used to default the insert location for new images, diagrams, or sections when the user's prompt doesn't name a position. Shape: {chunk_id: str, pos_in_chunk?: int, text_before?: str, text_after?: str}. Omit when the user typed in chat without focusing the editor first. | |
| thinking_depth | No | Reasoning depth: 'fast', 'balanced' (default), or 'deep'. Controls how much analysis the AI performs. | |
| image_attachments | No | Inline images for vision-based analysis (base64-encoded). | |
| touched_chunk_ids | No | Optional list of chunk ids (data-chunk-id values) the user actually edited since the last sync, sent alongside document_html. When present, a chunk NOT in this list whose text is unchanged keeps its stored formatting byte-for-byte even if the client serialized it differently (protects styling from editor round-trip loss). Chunks in the list — and any chunk whose text changed — always take the submitted content. Omit for the default behavior (any differing chunk is treated as an edit). | |
| cross_session_scope | No | Optional list of session ids to restrict cross-session SEARCH to (e.g. one end-customer's sessions). Omit to search all of this account's sessions. Only narrows within the API-key owner; ignored unless cross_session_search is on. | |
| cross_session_memory | No | When true, the AI carries a private rolling memory of context across THIS account's chats (off by default). Per-request override of your saved Settings default. | |
| cross_session_search | No | When true, the AI may search your PAST chats and documents on demand to reuse prior work and open a found document (off by default). Per-request override of your saved Settings default; never affects the always-on search of the open document. | |
| deleted_part_chunk_ids | No | Optional list of chunk ids (data-chunk-id values) of OUT-OF-FLOW part sections (page headers/footers, footnote/endnote bodies, comments) to delete explicitly, sent alongside document_html. Out-of-flow parts absent from document_html are always KEPT — an editor view not containing them is their normal state, never a deletion — so removing one requires naming its id here. Ids that are not stored out-of-flow parts are ignored (in-flow content keeps the default behavior). Omit when deleting nothing. | |
| cross_session_memory_key | No | Optional per-request id of YOUR end-customer so the cross-session memory note is kept in a separate file per end-customer. Omit for one account-level note (the default / B2C). | |