import { spawn } from "node:child_process";
import type { StructuredExecHost } from "./structured-exec-host.js";
import type { SessionSnapshot } from "./types.js";
import type { StructuredRunnerAdapter, StructuredRunnerContext, StructuredRunnerExecution, StructuredRunnerObserver } from "./structured-runner.js";
/** Build the stable CLI contract for a structured Codex turn. */
export declare function buildCodexArgs(session: SessionSnapshot): string[];
/** Owns the Codex CLI process and translates its NDJSON protocol into runner-neutral state. */
export declare class CodexRunner implements StructuredRunnerAdapter {
    private readonly spawnProcess;
    private readonly execHost?;
    constructor(spawnProcess?: typeof spawn, execHost?: StructuredExecHost | undefined);
    start(context: StructuredRunnerContext, observer: StructuredRunnerObserver): StructuredRunnerExecution;
}