/**
 * `peaks workspace clean` — slice 0.5 Task 9 (runtime-only after
 *
 * Prunes _runtime/<sid>/ directories older than --older-than hours.
 * Dry-run by default; pass --apply to commit. The previous
 * The legacy sub-agents / bare-sid cleanup axis (which moved bare
 * sids to a forensic dir) was removed when the archive dir was
 * retired; bare sids are now blocked at write time. sids
 * are now blocked at write time by `sid-naming-guard.ts`.
 */
import type { Command } from 'commander';
import { type ProgramIO } from '../../cli-helpers.js';
export declare function registerWorkspaceCleanCommand(workspace: Command, _io: ProgramIO): void;