/**
 * prune-registry migration (AC-20, AC-21): remove stale instance-registry
 * entries and release orphaned claims — the same logic behind
 * `aidlc status --prune`, whose surface is unchanged.
 *
 * Coordination files live in the git common dir, so running from a linked
 * worktree cleans shared state exactly once and never touches any index.
 */
import { type PruneItem } from '../../concurrency/registry.js';
import type { Migration } from '../types.js';
/**
 * The summary names every instance touched (autopilot/AC-17). A count alone hid
 * which shared records a run from a worktree had removed: an unattended dry run on
 * 2026-10-02 saw registry entries vanish and could not say whose.
 */
export declare function pruneSummary(removed: PruneItem[], released: string[]): string;
export declare const pruneRegistry: Migration;
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