export interface StreamResult<T> {
    /** Most recent payload delivered on this channel, or null if none received yet. */
    latest: T | null;
    /**
     * All payloads accumulated on this channel.
     *
     * - `mode: 'append'` deliveries are pushed to the tail (continuous stream).
     * - `mode: 'replace'` deliveries collapse `all` to a single-element array
     *   containing the latest payload — matching the channel's
     *   "full replacement" semantics.
     */
    all: T[];
    /**
     * Truthy after the channel has delivered an envelope with
     * `complete: true`. Subscribers flip into a "channel closed"
     * rendering state based on this signal; further deliveries on a
     * completed channel are still accumulated, since the underlying
     * wire doesn't enforce quiescence.
     */
    isComplete: boolean;
}
/**
 * Subscribe to deliveries on a named stream channel.
 *
 * Honors the channel's per-delivery `mode` ('append' vs 'replace')
 * and the optional `complete` terminal marker. Channels declared
 * `mode: 'replace'` on the spec typically emit every delivery with
 * `mode: 'replace'` — this hook folds them into a single-latest
 * value without accumulating history.
 *
 * @param channelName - Channel name from the GguiSession's streamSpec
 * @returns { latest, all, isComplete }
 */
export declare function useStream<T = unknown>(channelName: string): StreamResult<T>;
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