/**
 * JSON-based performance baseline store.
 * Pattern similar to BaselineStore but stores JSON snapshots instead of PNG images.
 */
import type { PerfSnapshot, PerfBaseline } from "../perf/types.js";
interface PerfBaselineEntry {
    name: string;
    platform: string;
    createdAt: string;
    updatedAt: string;
}
export declare class PerfBaselineStore {
    private readonly baselinesDir;
    constructor(cwd?: string);
    private getBaselinePath;
    private get manifestPath();
    private readManifest;
    private writeManifest;
    private ensureDir;
    private findEntry;
    save(name: string, platform: string, snapshot: PerfSnapshot, overwrite?: boolean): Promise<PerfBaseline>;
    get(name: string, platform: string): Promise<PerfBaseline>;
    list(platform?: string): Promise<PerfBaselineEntry[]>;
    delete(name: string, platform: string): Promise<void>;
    exists(name: string, platform: string): Promise<boolean>;
    getBaselinesDir(): string;
}
export {};
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