import type { InterruptibleEngine, EngineRunOpts, EngineResult } from "../shared/types.js";
import { HermesRpc } from "./hermes-jsonrpc.js";
interface ProcHandle {
    rpc: HermesRpc;
    killProc: () => void;
    isAliveProc: () => boolean;
    onExit: (cb: () => void) => void;
    onError: (cb: (err: Error) => void) => void;
}
export declare class HermesAcpEngine implements InterruptibleEngine {
    name: "hermes";
    private procs;
    /** Overridable in tests to shorten the handshake timeout. */
    protected handshakeTimeoutMs: number;
    /** Test seam — overridden in unit tests to inject a fake server. */
    protected spawnProc(bin: string, cwd: string, jinnSessionId?: string): ProcHandle;
    private getOrSpawn;
    private evictProc;
    run(opts: EngineRunOpts): Promise<EngineResult>;
    kill(sessionId: string): void;
    isAlive(sessionId: string): boolean;
    killAll(): void;
    /** No shared idle pool — per-session procs recycle via kill on org reload. */
    killIdle(): void;
}
export {};
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