/**
 * Unblock opportunities analysis.
 * @task T4784
 */
import type { TaskRef } from '@cleocode/contracts';
import type { DataAccessor } from '../store/data-accessor.js';
export interface HighImpactTask {
    taskId: string;
    title: string;
    wouldUnblock: number;
    dependents: string[];
}
export interface SingleBlockerTask {
    taskId: string;
    title: string;
    remainingBlocker: Pick<TaskRef, 'id' | 'title'>;
}
export interface CommonBlocker {
    taskId: string;
    title: string;
    blocksCount: number;
    blockedTasks: string[];
}
export interface UnblockResult {
    highImpact: HighImpactTask[];
    singleBlocker: SingleBlockerTask[];
    commonBlockers: CommonBlocker[];
}
/**
 * Analyze selected project tasks for dependency-unblocking opportunities.
 * @param cwd - Explicit owning project root, when supplied.
 * @param accessor - Optional canonical accessor already bound to that project.
 * @returns Existing potential-impact rankings and unresolved single/common blockers.
 * @throws Error when selected tasks or required dependency records cannot be read.
 * @remarks Done and archived dependencies satisfy the shared spawn policy;
 * cancelled and missing dependencies remain blockers. Lookup-only archive rows
 * never expand selected tasks. High-impact counts are transitive potential, not
 * proof that every dependent is immediately runnable or admitted.
 * @example
 * ```ts
 * const opportunities = await getUnblockOpportunities(projectRoot, accessor);
 * ```
 */
export declare function getUnblockOpportunities(cwd?: string, accessor?: DataAccessor): Promise<UnblockResult>;
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