import { type Signal } from '@opensip-tools/core';
import type { DataStore } from '@opensip-tools/datastore';
export declare class GraphBaselineRepo {
    private readonly datastore;
    constructor(datastore: DataStore);
    /**
     * Replace the entire baseline with a fresh fingerprint set in one
     * transaction. Mirrors v1's atomic-rename-of-tmp-file semantic.
     */
    save(signals: readonly Signal[]): void;
    /** Load the baseline fingerprint set. Empty array if no baseline exists. */
    loadFingerprints(): readonly string[];
    /** True iff a baseline has been saved (independent of whether the fingerprint set was empty). */
    exists(): boolean;
    /** When the baseline was captured (ms epoch), or `undefined` when none exists. */
    capturedAt(): number | undefined;
}
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