wb.history

undo(): Promise<UndoReceipt>;

Undo the last operation.

redo(): Promise<RedoReceipt>;

Redo the last undone operation.

canUndo(): boolean;

Check if undo is available. Synchronous (uses cached state).

canRedo(): boolean;

Check if redo is available. Synchronous (uses cached state).

list(): UndoHistoryEntry[];

Get the undo history entries. Synchronous.

goToIndex(index: number): Promise<void>;

Undo to a specific index in the history. Performs multiple undo operations to reach the target state. @param index - Index in the history (0 = most recent operation)

getState(): Promise<UndoState>;

Get the full undo/redo state from the compute engine. Returns depth counts used by CheckpointManager to track checkpoint state.

subscribe(listener: (event: UndoStateChangeEvent) => void): CallableDisposable;

Subscribe to undo/redo state changes. Called whenever the undo stack changes (push, undo, redo, clear). @returns Unsubscribe function

setNextDescription(description: string): void;

Set the description for the next undo step. Call immediately before a mutation to label the undo entry.