import type { GraphManifest, StalenessVerdict } from "./types.js";
export declare class GraphArtifactStore {
    private readonly projectRoot;
    private readonly graphDir;
    private readonly manifestPath;
    constructor(projectRoot: string, manifestRelPath?: string);
    ensureLayout(): Promise<void>;
    readManifest(): Promise<GraphManifest | null>;
    writeManifest(m: GraphManifest): Promise<void>;
    staleness(): Promise<StalenessVerdict>;
    private gitHeadSha;
    private filesNewerThan;
}
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