/**
 * Governance Audit Aggregation — 只读聚合 GovernanceDecisionRecord,产出覆盖率报告。
 *
 * 禁止:写 Store、修改 Decision、重算 governance。只读分析。
 * 回答:多少 Plan 触发 governance?哪些 Policy 命中?未触发原因?
 */
import type { GovernanceDecisionRecord, GovernanceSkipReason } from "./decision_store.js";
/** Policy 使用统计。 */
export interface PolicyUsage {
    policyId: string;
    count: number;
}
/** Requirement 使用统计。 */
export interface RequirementUsage {
    requirementId: string;
    count: number;
}
/** Governance 覆盖率报告(只读聚合)。 */
export interface GovernanceCoverageReport {
    totalDecisions: number;
    generated: number;
    failed: number;
    policyUsage: PolicyUsage[];
    requirementUsage: RequirementUsage[];
    /** 跳过原因统计(NO_POLICY_MATCH 派生自 generated + policyIds 空)。 */
    skipped: Record<GovernanceSkipReason, number>;
}
/** 聚合 Decision 记录 → 覆盖率报告(纯函数,deterministic)。 */
export declare function aggregateCoverage(records: GovernanceDecisionRecord[]): GovernanceCoverageReport;