import type { BackendContext, FilesystemBackend, FilesystemMiddleware } from "@dawn-ai/workspace";
export interface MiddlewareHarness {
    readonly backend: FilesystemBackend;
    readonly ctx: BackendContext;
    readonly dir: string;
    assertForwardsAll(): void;
    close(): Promise<void>;
    [Symbol.asyncDispose](): Promise<void>;
}
export declare function createMiddlewareHarness(middleware: FilesystemMiddleware): Promise<MiddlewareHarness>;
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