import type { Extension } from "./types.ts";
export declare function isExtensionGenerationInactive(extension: Extension): boolean;
/**
 * Unsubscribe a replaced extension generation's event handlers and invoke every disposer within
 * one bounded deadline. This lifecycle owner is intentionally independent from extension module
 * loading so ordinary session construction does not pull the loader's bundled SDK graph into
 * memory merely to release an already-loaded generation.
 */
export declare function disposeExtensionEventSubscriptions(extensions: Extension[], options?: {
    deactivate?: boolean;
    timeoutMs?: number;
}): Promise<void>;
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