import { spawn } from "node:child_process";
import type { StructuredExecHost } from "./structured-exec-host.js";
import type { StructuredRunnerAdapter, StructuredRunnerContext, StructuredRunnerExecution, StructuredRunnerObserver, StructuredRunnerTurnState } from "./structured-runner.js";
import type { SessionSnapshot } from "./types.js";
export declare function buildPiArgs(session: SessionSnapshot, prompt: string): string[];
export declare function piToolName(name: string): string;
export declare function applyPiEvent(state: StructuredRunnerTurnState, event: Record<string, unknown>): string | null;
export declare class PiRunner implements StructuredRunnerAdapter {
    private readonly spawnProcess;
    private readonly execHost?;
    constructor(spawnProcess?: typeof spawn, execHost?: StructuredExecHost | undefined);
    start(context: StructuredRunnerContext, observer: StructuredRunnerObserver): StructuredRunnerExecution;
}