/**
 * Ledger Engine — records pipeline outcomes and supports traceability queries.
 *
 * Responsibilities (arc42 §5.2.4):
 *  - record(): collect artifacts from a completed pipeline, generate a LedgerEntry,
 *    append to ledger.jsonl (append-only, §8.5 write-tmp + rename).
 *  - query(): filter ledger entries by pipelineId / scope / conclusion / time range.
 *
 * Storage: ledger.jsonl — one JSON object per line, append-only.
 */
import type { LedgerEntry, LedgerFilter, ObjectiveKeyResult, PdcaCycleRecord } from '../types/index.js';
export declare class LedgerEngine {
    private readonly basePath;
    private readonly ledgerPath;
    constructor(basePath: string);
    /**
     * Record a pipeline's outcome as a ledger entry.
     * Reads the pipeline state, collects all stage records and artifacts,
     * determines conclusion, and appends to ledger.jsonl.
     * Includes OKR/PDCA data when available (FR-18, AC-18.14).
     */
    record(pipelineId: string, okrData?: {
        okrTree?: ObjectiveKeyResult[];
        krAchievement?: Array<{
            krId: string;
            status: string;
            achievementPct: number;
        }>;
        pdcaCycles?: PdcaCycleRecord[];
    }): LedgerEntry;
    /**
     * Query ledger entries with optional filters.
     * Supports: pipelineId, scope, conclusion, since (>=), until (<=).
     */
    query(filter: LedgerFilter): LedgerEntry[];
    /**
     * Append a single entry to ledger.jsonl using §8.5 write-tmp + rename.
     * Reads existing content, appends the new line, writes to tmp, renames.
     */
    private appendEntry;
}
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