import { type PhaseRetroEntry, type RetroRollup } from '@manehorizons/cadence-types';
import type { CommandIO } from './io.js';
/**
 * Phase 186 (rec-20260712-002). Pure aggregation across every scanned
 * phase's retro digest — no I/O. Each of the three frequency dimensions
 * dedupes per phase (a phase contributes at most once per distinct key)
 * before splitting into `recurring` (2+ phases) vs `oneOff` (exactly 1),
 * per AC-2.
 */
export declare function computeRetroRollup(entries: PhaseRetroEntry[]): RetroRollup;
/**
 * Phase 186 (rec-20260712-002). Best-effort walk of each phase directory
 * under `.cadence/phases` for `<draftId>-RETRO.json` artifacts, feeding
 * `computeRetroRollup`. Follows
 * this codebase's "best-effort introspection never throws" convention
 * (`CLAUDE.md`, mirrors `intelligence.ts`'s `audit` command): a missing
 * `.cadence/phases` directory is the normal "nothing to scan yet" case and
 * returns `[]` silently, while a malformed individual artifact is a stderr
 * notice + skip (AC-5) so one bad phase never aborts the whole scan.
 */
export declare function scanRetroArtifacts(cwd: string, io: CommandIO): Promise<PhaseRetroEntry[]>;
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