/**
 * ADR-002 Meta trigger — drift.jsonl 누적을 읽어 rule 의 mech 재분류 후보를 산출.
 *
 * 현 스코프 (v0.4.0 follow-up):
 *   - `stuck_loop_force_approve` 이벤트를 recent window(기본 7 일) 에서 집계.
 *   - 같은 rule_id 에서 임계치(기본 3) 이상 발생 시 **Mech demotion 후보** 로 분류.
 *   - demotion 은 Mech-A/B → 한 단계 완화:
 *       - A (block 강제) → B (self-check 권고)
 *       - B (self-check) → C (drift 측정)
 *       - C 는 그대로 (더 강등 불가)
 *   - dry-run 기본. `--apply` 시 rule 파일의 enforce_via[].mech 갱신 + meta_promotions 추가.
 *
 * v0.4.1+ 확장 여지 (본 파일에는 미구현):
 *   - Mech promotion (B → A): rolling 20 injects 중 violation 0 → 승급.
 *     이 경로는 별도 evidence source (solution-outcomes) 필요.
 *   - 30 일 쿨다운.
 */
import type { LifecycleEvent } from './types.js';
import type { EnforcementMech, Rule } from '../../store/types.js';
export interface DriftEntry {
    at: string;
    kind: string;
    session_id: string;
    rule_id: string;
    count: number;
    reason_preview?: string;
    message_preview?: string;
}
export interface DemotionCandidate {
    rule_id: string;
    event_count: number;
    first_at: string;
    last_at: string;
    sessions: string[];
    window_days: number;
    current_mechs: EnforcementMech[];
}
export declare function readDriftEntries(driftPath?: string): DriftEntry[];
export declare function scanDriftForDemotion(options?: {
    rules: Rule[];
    drift?: DriftEntry[];
    windowDays?: number;
    threshold?: number;
    cooldownDays?: number;
    now?: number;
}): DemotionCandidate[];
export declare function demoteMech(from: EnforcementMech): EnforcementMech | null;
export declare function promoteMech(from: EnforcementMech): EnforcementMech | null;
export interface PromotionCandidate {
    rule_id: string;
    injects_rolling_n: number;
    violations_rolling_n: number;
    current_mechs: EnforcementMech[];
    reason: string;
}
/**
 * rolling N 개 inject 중 violation 0 → Mech 승급 후보.
 * inject 추적 인프라가 완비되기 전에는 `rolling_min_injects` (기본 20) 미만이면 skip.
 */
export declare function scanSignalsForPromotion(options: {
    rules: Rule[];
    rolling_min_injects?: number;
    cooldownDays?: number;
    ts?: number;
    signals: Map<string, import('./types.js').RuleSignals>;
}): PromotionCandidate[];
export declare function applyPromotion(rule: Rule, candidate: PromotionCandidate, now?: number): ApplyResult;
export interface ApplyResult {
    rule_id: string;
    before_mech: EnforcementMech[];
    after_mech: EnforcementMech[];
    events: LifecycleEvent[];
    applied: boolean;
    reason?: string;
}
export declare function applyDemotion(rule: Rule, candidate: DemotionCandidate, now?: number): ApplyResult;
export declare function appendLifecycleEvents(events: LifecycleEvent[], now?: number): void;
export declare function runMetaScan(args: string[]): Promise<void>;