/**
 * Read one bounded request from stdin without using a synchronous `/dev/stdin`
 * read. Bun can busy-loop while reading fd 0 from an SSH channel, both through
 * synchronous fs calls and its JavaScript stream adapters. A fixed native
 * `head` process owns that descriptor and returns at most limit + 1 bytes, so
 * Bun handles only an already-bounded child stdout stream.
 */
export declare function readBoundedStdin(maxBytes: number): Promise<string>;