/**
 * Promise operations captured before extension activation mutates the host
 * realm. Shutdown coordination must not consult live Promise constructors,
 * prototype methods, or species hooks after extension code has run.
 *
 * @internal
 */
export declare function createProxyShutdownPromise<T>(executor: (resolve: (value: T | PromiseLike<T>) => void, reject: (reason?: unknown) => void) => void): Promise<T>;
export declare function continueProxyShutdownPromise<T, R>(promise: Promise<T>, onFulfilled: (value: T) => R, onRejected: (reason: unknown) => R): Promise<R>;
/**
 * Assimilate native Promises through the captured prototype operation. Plain
 * thenables still use the standard Promise resolution procedure because their
 * `then` callback is application-owned by definition.
 */
export declare function resolveProxyShutdownValue<T>(value: T | PromiseLike<T>): Promise<T>;
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