/**
 * Shared Cloudflare-migration test doubles: a fake KV `Http` that satisfies
 * mcp-core's `CfKvBackend` wire contract, plus a multi-user env preset. Lets the
 * credential-layer unit tests run offline and reproducibly against the same
 * backend the deployed Worker uses.
 */
/**
 * Structural shape of mcp-core's injectable `Http` (storage/backends.ts):
 * `request(method, url, data?, headers?) -> { status, body }`. Declared locally
 * so the harness does not depend on `Http` being re-exported from the subpath.
 */
export interface KvHttp {
    request(method: string, url: string, data?: Uint8Array | Buffer, headers?: Record<string, string>): Promise<{
        status: number;
        body: Uint8Array | Buffer;
    }>;
}
/**
 * In-memory KV that implements the `CfKvBackend` wire contract exactly:
 * PUT -> 200, GET -> 200/404, DELETE -> 200/404. The key is the last URL
 * segment, percent-decoded (CfKvBackend `encodeURIComponent`s the whole key).
 */
export declare class FakeKvHttp implements KvHttp {
    readonly store: Map<string, Uint8Array<ArrayBufferLike>>;
    request(method: string, url: string, data?: Uint8Array | Buffer): Promise<{
        status: number;
        body: Uint8Array;
    }>;
}
/** Apply the canonical CF multi-user env preset (dummy secrets only). */
export declare function applyCfEnv(): void;
/** Restore the single-user (LocalFs) default by clearing the CF env. */
export declare function clearCfEnv(): void;
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