import type { FailureSummary } from "../execution/failure.js";
import { type SessionHandle } from "../execution/open-session.js";
import { type QuestionMode } from "../interpretation/question.js";
/** Captured from `session_close`: a refused session open (#345) or a crash
 * with no open turn (#347) leaves a session failure for `closed` to carry. */
export interface CloseInfo {
    exitCode: number | null;
    cause: string;
    failure?: FailureSummary;
}
export type SessionOrigin = "fresh" | "resumed";
export interface JsonSessionArgs {
    readonly handle: SessionHandle;
    readonly sessionId: string;
    readonly harness: string;
    readonly hcnVersion: string;
    readonly questions?: QuestionMode;
    readonly origin: SessionOrigin;
    /** Read after close - the runner's final exitCode and cause. */
    readonly getCloseInfo: () => CloseInfo;
    /** Read after close - ids the runner accepted and never
     * delivered. Each owes the consumer a rejection (RFC S003). */
    readonly getDroppedIds?: () => readonly string[];
    /** Injected for tests; defaults to process.stdin / process.stdout. */
    readonly input?: NodeJS.ReadableStream;
    readonly write?: (line: string) => boolean;
    readonly onDrain?: (fn: () => void) => void;
}
export declare const runJsonSession: (a: JsonSessionArgs) => Promise<number>;
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