/**
 * retrospective-index — load `.peaks/retrospective/index.json`, parse to
 * `RetrospectiveEntry[]`, return the index envelope.
 *
 * the index, no MD-tree fallback. The migration script (G9) is the only
 * writer; this loader is read-only.
 */
export type RetrospectiveType = 'refactor' | 'feature' | 'bugfix' | 'config' | 'docs' | 'chore';
export type RetrospectiveOutcome = 'shipped' | 'blocked' | 'in-flight' | 'cancelled';
export interface RetrospectiveEntry {
    id: string;
    sessionId: string;
    sliceId?: string;
    type: RetrospectiveType;
    title: string;
    summary: string;
    outcome: RetrospectiveOutcome;
    keyDecisions: string[];
    lessonsLearned: number;
    artifactPaths: string[];
    updatedAt: string;
}
export interface RetrospectiveIndex {
    version: 1;
    updatedAt: string;
    entries: RetrospectiveEntry[];
}
export interface RetrospectiveIndexResult {
    projectRoot: string;
    indexPath: string;
    entries: RetrospectiveEntry[];
    totalCount: number;
    source: 'index.json' | null;
    warning: string | null;
}
export declare function loadRetrospectiveIndex(projectRoot: string): RetrospectiveIndexResult;