/**
 * Apply Writeback Plan — Write formula results back to the live workbook.
 *
 * This is the **only** file that mutates live workbook/cell objects in the
 * new engine pipeline. It reads a `WritebackPlan` and applies each operation
 * to the workbook.
 *
 * ## Responsibilities
 *
 * 1. Apply `ScalarWrite` → set `cell.result`.
 * 2. Apply `CSEWrite` → distribute array across CSE range, update session cache.
 * 3. Apply `SpillWrite` → write source + ghost cells, update persistent maps.
 * 4. Apply `SpillErrorWrite` → set #SPILL! on source cell.
 * 5. Apply `CleanupWrite` → clear stale ghost cells.
 * 6. Apply `PreserveWrite` → no-op (cell keeps existing result).
 * 7. Update persistent spill maps and ghost snapshot maps.
 */
import type { WorkbookLike } from "../materialize/types.js";
import type { WritebackPlan } from "../materialize/writeback-plan.js";
/**
 * Apply a `WritebackPlan` to a live workbook.
 *
 * This mutates the workbook in-place. Operations are applied in order.
 * After all operations, persistent spill metadata is updated.
 */
export declare function applyWritebackPlan(workbook: WorkbookLike, plan: WritebackPlan): void;