import type { DhfDocument } from './document-ir.js';
/** A snapshot of a DHF document at a point in time */
export interface DhfSnapshot {
    /** Snapshot ID (timestamp-based) */
    id: string;
    /** Document type ID */
    documentId: string;
    /** Creation timestamp */
    timestamp: string;
    /** Label/description for this snapshot */
    label?: string;
    /** Section summaries */
    sections: Array<{
        id: string;
        title: string;
        status: string;
        elementCount: number;
        gapCount: number;
        /** Hash of section content for change detection */
        contentHash: string;
    }>;
    /** Overall stats */
    totalElements: number;
    totalGaps: number;
    status: string;
}
/** Create a snapshot from a compiled DHF document */
export declare function createSnapshot(doc: DhfDocument, label?: string): DhfSnapshot;
/** Save a snapshot to the .memo/dhf-snapshots/ directory */
export declare function saveSnapshot(projectDir: string, snapshot: DhfSnapshot): string;
/** Load all snapshots for a document type */
export declare function loadSnapshots(projectDir: string, documentId: string): DhfSnapshot[];
/** Load the latest snapshot for a document type */
export declare function loadLatestSnapshot(projectDir: string, documentId: string): DhfSnapshot | undefined;
/** Diff result between two snapshots */
export interface DhfDiffResult {
    /** Baseline snapshot */
    baseline: DhfSnapshot;
    /** Current snapshot */
    current: DhfSnapshot;
    /** Sections that changed */
    changedSections: Array<{
        id: string;
        title: string;
        changeType: 'added' | 'removed' | 'modified' | 'unchanged';
        baselineStatus?: string;
        currentStatus?: string;
        elementDelta: number;
        gapDelta: number;
    }>;
    /** Summary metrics */
    elementDelta: number;
    gapDelta: number;
    statusChange: string;
}
/** Compare two snapshots */
export declare function diffSnapshots(baseline: DhfSnapshot, current: DhfSnapshot): DhfDiffResult;
/** Generate a redline Document IR from a diff */
export declare function generateRedlineDocument(diff: DhfDiffResult): DhfDocument;
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