/**
 * PiAgent is the real AgentPort: it turns a RunSpec into pi argv, spawns the
 * pi binary in the step's worktree via an injected ProcessRunner, and parses
 * the JSONL stdout into a structured result.
 *
 * The ProcessRunner seam keeps this logic unit-testable with a fake; the live
 * binding (NodeProcessRunner) is exercised by the smoke test, not unit tests.
 */
import type { AgentPort, ProcessRunner } from "../ports/agent.ts";
import { type ModelOverrides, type RunSpec } from "../domain/run-spec.ts";
import { type PiResult } from "../domain/pi-result.ts";
export declare class PiAgent implements AgentPort {
    private readonly piBinary;
    private readonly runner;
    private readonly overrides;
    private readonly runId?;
    constructor(piBinary: string, runner: ProcessRunner, overrides?: ModelOverrides, runId?: string | undefined);
    run(spec: RunSpec, onActivity?: (activity: string) => void): Promise<PiResult>;
}