cnvs.app

ALWAYS call this first when given a board URL or ID.

Full structured JSON state of a board: texts (id, x, y, content, color, width, postit, author), strokes (id, points, color, author), images (id, x, y, width, height, dataUrl, thumbDataUrl, author; heavy base64 >8 kB elided to dataUrl:null, tiny images inlined).

Compact schematic SVG render of the board (typically a few kB even for dense boards).

Create a NEW text node, or update an existing one (pass the same `id` to overwrite content/position in place — preferred over creating a duplicate).

Drop a URL capsule onto the board — rendered as a clickable pill showing the hostname.

Place a raster or SVG image on the board at (x, y) with explicit width/height in board pixels.

Draw a freehand stroke on the board.

Reposition an existing item to a new (x, y) without retyping its content.

Delete a single item by id.

Long-poll: blocks until the next edit lands on this board, then returns.

Choose whether this board is a freeform whiteboard ('draw', the default) or a kanban task board ('todo').

Add a kanban column (swimlane) to a 'todo' board.

Rename, reorder, recolor or move an existing kanban column.

Delete a kanban column by id.

Create a task (card) in a column on a 'todo' board.

Update an existing task by `id` (from `list_tasks`).

Move a task to a column at a given sort position — the kanban drag-and-drop primitive.

Delete a task (card) by id.

Read the full kanban state of a 'todo' board: `{ mode, columns, tasks }`, both ordered by their `sort` key (ascending).

Set (or clear) the title of a kanban row (lane).

Set the shared kanban column width in pixels for a 'todo' board (all columns share one width).

Bulk-create multiple task cards in one call — far cheaper than calling `create_task` N times.

Read tasks from a 'todo' board with server-side filtering — handy for 'what's overdue?' / 'what's assigned to X?' without pulling the whole board.

Export a 'todo' board's columns + tasks as a single text document.