import type { ExtensionAPI, ExtensionContext, SessionShutdownEvent, SessionStartEvent } from "@earendil-works/pi-coding-agent";
/** 一个进程只暴露主会话；同进程 SDK 子会话不得接管它的连接或生命周期。 */
export declare class ExtensionOwner {
    private rejected;
    private session;
    isCurrent(): boolean;
    activate(event: SessionStartEvent, ctx: ExtensionContext): boolean;
    release(event: SessionShutdownEvent): void;
    private matchesHandoff;
    guard(pi: ExtensionAPI): ExtensionAPI;
}
export declare function resetExtensionOwnerForTest(): void;