/**
 * Reads a single JSON message from stdin.
 *
 * Uses unixPipeToLines to correctly handle newline-delimited input,
 * parsing the first complete line as JSON. Resolves once a valid
 * JSON message is received, or rejects if stdin closes first.
 *
 * @returns Promise that resolves with the parsed JSON message
 */
export declare function readStdinAsJson<T = unknown>(): Promise<T>;
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