/**
 * In-memory tracker for in-flight byte-slice uploads on the MCP stdio server.
 *
 * Why this exists: `classifyAudio` returns immediately after slice 0 to stay
 * within the MCP client's tool-call wall budget. The tail upload (slices 1..N)
 * runs in the background of the same Node process. AI agents poll
 * `getUploadStatus(uploadSessionId)` to learn when the tail has produced a
 * `requestId` they can pass to `getJob`.
 *
 * Lifetime: lives in the singleton MCP server process between tool calls.
 * Lost on process restart — same blast radius as today's in-flight promise.
 */
export type UploadState = {
    uploadSessionId: string;
    fileName: string;
    totalSlices: number;
    slicesUploaded: number;
    totalBytes: number;
    startedAt: string;
    lastUpdatedAt: string;
    status: 'uploading' | 'complete' | 'failed';
    requestId?: string;
    error?: string;
};
export declare function trackerStart(state: Omit<UploadState, 'lastUpdatedAt'>): void;
export declare function trackerUpdate(uploadSessionId: string, patch: Partial<UploadState>): void;
export declare function trackerGet(uploadSessionId: string): UploadState | undefined;
export declare function trackerSize(): number;
/** Test-only: clear the tracker between cases. */
export declare function trackerReset(): void;
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