import type { Readable, Writable } from "node:stream";
import type { AdmittedChatSession, CloseReport } from "./session.js";
/** Bound on buffered output records waiting for a slow reader before input is paused. Provisional. */
export declare const MAX_PENDING_OUTPUT_BYTES: number;
/**
 * Split decoded text into complete lines. A line longer than {@link MAX_REQUEST_LINE} is discarded
 * up to its next newline, and reported once with no content. A trailing `\r` before `\n` is dropped
 * (CRLF input). StringDecoder decodes invalid UTF-8 as U+FFFD, which never splits a line. In ordinary
 * string content it can reach the request as U+FFFD; in an escape sequence or outside a string it
 * makes the JSON parse refuse.
 */
export declare class LineFramer {
    private readonly onLine;
    private readonly onOversize;
    private readonly decoder;
    private buffer;
    private discarding;
    constructor(onLine: (line: string) => void, onOversize: () => void);
    push(chunk: Buffer | string): void;
    /** End of input: flush a final unterminated line, if any. */
    end(): void;
    private feed;
}
/**
 * Run one `--stdio` session over the given streams until stdin ends or the session ends.
 * Returns the close report. The caller owns admission (it passes an already admitted session)
 * and the process exit code; this function never exits the process.
 */
export declare function runStdio(opts: {
    session: AdmittedChatSession;
    stdin: Readable;
    stdout: Writable;
    diagnostic: (line: string) => void;
}): Promise<CloseReport | undefined>;
//# sourceMappingURL=stdio-io.d.ts.map