import type { ExtensionContext } from "@earendil-works/pi-coding-agent";
export type ClaimedSessionDelivery = {
    deliveryId: string;
    claimExpiresAt: number;
    isStillDeliverable: () => boolean | Promise<boolean>;
    findSessionEntryId: (entries: readonly unknown[]) => string | undefined;
    send: () => void;
    settle: (sessionEntryId: string) => Promise<void>;
};
export type ClaimSessionDelivery = () => Promise<ClaimedSessionDelivery | undefined>;
/**
 * Delivers at most one server-owned message into a Pi session at a time.
 *
 * Pi's public sendMessage API does not return the saved session entry ID. Keep
 * the claimed delivery in memory until that entry becomes observable. Polling
 * may reconcile the delivery, but it must never send the same claim again.
 */
export declare class SessionDeliveryCoordinator {
    private readonly queued;
    private claimed;
    private synchronizing;
    synchronize(ctx: Pick<ExtensionContext, "hasPendingMessages" | "isIdle" | "sessionManager" | "ui">, claimers: readonly ClaimSessionDelivery[]): Promise<void>;
    clear(): void;
    private sendClaimed;
    private rememberQueued;
    private settleQueued;
    private settleDelivery;
}