import type { BlockRef, CoreIssue, CoreRoot } from './core/engine.js';
export interface VisualizerOperationalBlockStatus {
    blocked: boolean;
    blockers: BlockRef[];
}
/** Serialize the canonical whole-graph dispatch frontier for the visualizer payload. */
export declare function visualizerOperationalBlocking(root: CoreRoot, isIssueDone?: (issue: CoreIssue) => boolean): Record<string, VisualizerOperationalBlockStatus>;