/**
 * Browser-safe accessors for optional Node builtins.
 *
 * `node:async_hooks` and `node:events` are server-only, but the modules that
 * use them (db telemetry, settings/resource emitters) can land in the browser
 * dev graph before tree-shaking runs. A static `import { X } from "node:..."`
 * resolves to Vite's externalized stub and throws the instant the value is
 * touched at module load. We read the builtin through `process.getBuiltinModule`
 * instead — the same guard `server/request-context.ts` uses — so there is no
 * static `node:` import to evaluate in the browser, and callers fall back to a
 * no-op on non-Node runtimes (browser, or Node without getBuiltinModule).
 */
import type { AsyncLocalStorage } from "node:async_hooks";
import type { EventEmitter } from "node:events";
export type AsyncLocalStorageCtor = new <T>() => AsyncLocalStorage<T>;
export declare function getAsyncLocalStorageCtor(): AsyncLocalStorageCtor | undefined;
/**
 * Returns a real Node EventEmitter on Node, or a no-op emitter elsewhere. The
 * emitters that use this drive server-side SSE fan-out; nothing subscribes in
 * the browser, so the no-op fallback is inert rather than wrong.
 */
export declare function createEventEmitter(): EventEmitter;
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