import type { AcpTransport } from "./transport.ts";
/** A handler for an inbound agent→client request; its resolved value is the result. */
export type AcpRequestHandler = (params: unknown) => unknown | Promise<unknown>;
/** A handler for an inbound agent→client notification (no response). */
export type AcpNotificationHandler = (params: unknown) => void;
/** A JSON-RPC error returned by, or raised toward, the peer. */
export declare class AcpRpcError extends Error {
    readonly code: number;
    readonly data: unknown;
    constructor(code: number, message: string, data?: unknown);
}
export declare class AcpConnection {
    #private;
    constructor(transport: AcpTransport);
    /** Send a request and resolve with its `result` (or reject with its `error`). */
    request(method: string, params?: unknown): Promise<unknown>;
    /** Send a fire-and-forget notification (no id, no response). */
    notify(method: string, params?: unknown): void;
    /** Register the handler for an inbound notification `method` (last wins). */
    onNotification(method: string, handler: AcpNotificationHandler): void;
    /** Register the handler for an inbound request `method` (last wins). */
    onRequest(method: string, handler: AcpRequestHandler): void;
    /** Close the connection, rejecting every in-flight request. */
    close(): void;
}