import type { Session, SessionEvent, SessionQueueSnapshot } from "@opengeni/sdk";
import type { ComposerState, TimelineItem } from "../session.js";
import { type SessionStartupSource } from "./session-startup.js";
type StartupInput = {
    session: Pick<Session, "id" | "status" | "activeTurnId" | "effectiveControl" | "dispatchWait" | "inputWait" | "lastSequence" | "queueVersion">;
    events: SessionEvent[];
    optimisticMessages: ComposerState["optimisticMessages"];
    hasNewer: boolean;
    queue?: SessionQueueSnapshot | null | undefined;
    fallbackStartedAt?: string | undefined;
};
/** Presentation only. Accepted work is not proof that a worker is executing. */
export declare function sessionStartupTimeline(items: TimelineItem[], input: StartupInput): TimelineItem[];
/** A prompt the host already sent while its session is still being created or loaded. */
export type PendingPrompt = {
    /** The prompt exactly as the person sent it. */
    text: string;
    /** When the person sent it (ISO 8601). Anchors the startup row's clock. */
    sentAt: string;
};
/** The startup row keeps this id from the pending prompt through the live projection. */
export declare const PENDING_PROMPT_STARTUP_ID = "pending-prompt-startup";
/**
 * Keep the current loading visual while a session-only wake acquires a turn ID.
 * The web app's session page and the embeddable conversation both project
 * through this, so a sent prompt shows the same startup row in either. A
 * session that has not loaded yet leaves the timeline unchanged.
 */
export declare function useSessionStartupTimeline(items: TimelineItem[], input: Omit<StartupInput, "fallbackStartedAt" | "session"> & {
    session: (StartupInput["session"] & SessionStartupSource) | null;
    /**
     * A prompt sent before the session or its history is readable. Until
     * `historyReady`, the timeline is that prompt and a running startup row;
     * the live row then keeps the same id and clock, so nothing remounts.
     */
    pendingPrompt?: PendingPrompt | null | undefined;
    historyReady?: boolean | undefined;
}): TimelineItem[];
export {};