/**
 * Shared NDJSON line-reader for the control stream (fd 0). Used by both the
 * tier-2 managed loop (`serve.ts`) and the native-streaming loop
 * (`serve-native.ts`) so the two serve tiers read lines identically.
 */
import type { Readable } from "node:stream";
/** Async-iterate NDJSON lines off a Readable. */
export declare function lines(input: Readable): AsyncIterable<string>;
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