/** Stores streamed tool-call argument JSON for live renderers and parser recovery. */
export declare const kStreamingPartialJson: unique symbol;
/** Carries streamed tool-call argument JSON without exposing a string-keyed property. */
export type StreamingPartialJsonCarrier = object & {
    [kStreamingPartialJson]?: string;
};
/** Reads streamed tool-call argument JSON from a block or event snapshot. */
export declare function getStreamingPartialJson(block: StreamingPartialJsonCarrier | null | undefined): string | undefined;
/** Writes streamed tool-call argument JSON to a block or clears it with `undefined`. */
export declare function setStreamingPartialJson(block: StreamingPartialJsonCarrier, value: string | undefined): void;
/** Clears streamed tool-call argument JSON without deleting or changing object shape. */
export declare function clearStreamingPartialJson(block: StreamingPartialJsonCarrier): void;
/** Stores a provider-local stream block index without exposing a string-keyed property. */
export declare const kStreamingBlockIndex: unique symbol;
/** Stores the last parsed argument prefix length for throttled streaming JSON parsing. */
export declare const kStreamingLastParseLen: unique symbol;
/** Marks streamed tool-call arguments that already received an authoritative done payload. */
export declare const kStreamingArgumentsDone: unique symbol;
/** Classifies Cursor's in-flight tool-call kind without leaking provider-private state. */
export declare const kStreamingBlockKind: unique symbol;