export type WorkFileImportStage = 'reading' | 'parsing' | 'analyzing' | 'finalizing';
export interface WorkFileImportProgress {
    stage: WorkFileImportStage;
    stageProgress: number;
    progress: number;
    bytesRead: number;
    totalBytes: number;
}
export interface WorkFileImportOptions {
    /** Reuses a host-reserved identity so an editor shell can mount in parallel. */
    artifactId?: string;
    /** Reuses host-reserved worksheet identities during a spreadsheet import. */
    spreadsheetSheetIds?: readonly string[];
    signal?: AbortSignal;
    onProgress?: (progress: WorkFileImportProgress) => void;
}
export interface WorkFileImportContext {
    bytes: ArrayBuffer;
    controller: WorkFileImportController;
    spreadsheetSheetIds?: readonly string[];
}
export declare class WorkFileImportController {
    private readonly options;
    readonly totalBytes: number;
    private progress;
    constructor(options: WorkFileImportOptions, totalBytes: number);
    get signal(): AbortSignal | undefined;
    throwIfAborted(): void;
    report(stage: WorkFileImportStage, stageProgress: number, bytesRead?: number): void;
    checkpoint(stage: WorkFileImportStage, stageProgress: number): Promise<void>;
    yieldToMainThread(): Promise<void>;
    complete(): void;
}