@bimetal/kanban-headless

@bimetal/kanban-headless

The canonical, framework-agnostic kanban controller — instance #2 of the BIMETAL component family. Built on @bimetal/headless-core exactly like the calendar controller, so it shares the identity-stable getSnapshot/subscribe contract and errors-as-state surface; framework bindings are pure bindings.

createKanbanController({ store, boardId, config }) owns every board interaction decision:

• Dialog — openCreateCard / openEditCard / saveCard / deleteCard.
• Drag/drop — dropCard(cardId, toColumnId, toIndex) / reorderCard, with startDrag / updateDragPreview / endDrag for live previews.
• WIP-error-as-state — a rejected create/move (WIP limit) surfaces as snapshot.lastAction (a toast) and never throws into the binding.
• Undo — undo() reverts the whole board one step; Ctrl/Cmd+Z via handleKeydown.
• Filter / selection — setFilter, selectCard / clearSelection.

The cut line is identical to the calendar controller: DOM measurement and listener registration belong to the framework; every if belongs here.