import type { Board } from "./model.js";
export interface BaselineMetadata {
    pinned: true;
    id: string;
    name: string;
    sourceBoard: string;
    sourceRevision: string;
    capturedAt: string;
    capturedBy: string;
}
/** The original capture cannot be recovered from a mutable legacy reference. */
export interface LegacyBaselineMetadata {
    pinned: false;
    sourceBoard: string;
    name: string;
}
export declare function validateBaseline(snapshot: Board, metadata: BaselineMetadata): void;
/** Copy the materialized design; captures never nest another baseline. */
export declare function captureBaseline(board: Board, metadata: BaselineMetadata): {
    baseline: BaselineMetadata;
    snapshot: Board;
};