/**
 * Per-session control endpoint — a Unix domain socket served by the RuntimeOwner so
 * stateless `gjc harness` CLI calls can route owner-routed primitives (submit, observe,
 * recover, retire) to the live owner. One JSON request line in, one JSON response line out.
 *
 * The owner is the only listener; clients connect per call. When no socket is reachable
 * the caller falls back to the no-owner behavior (read-only observe, owner-not-live submit).
 *
 * FIFO fallback (for platforms/paths where AF_UNIX is unavailable or path-length limited)
 * is a documented seam tracked as an ADR follow-up.
 */
export interface EndpointRequest {
    verb: string;
    input: Record<string, unknown>;
}
export type EndpointHandler = (req: EndpointRequest) => Promise<unknown>;
export declare class ControlServer {
    #private;
    readonly socketPath: string;
    private readonly handler;
    constructor(socketPath: string, handler: EndpointHandler);
    listen(): Promise<void>;
    close(): Promise<void>;
}
export declare class EndpointUnreachableError extends Error {
    readonly socketPath: string;
    readonly reason: string;
    constructor(socketPath: string, reason?: string);
}
/** Call the owner's control endpoint. Rejects with {@link EndpointUnreachableError} when no owner listens or responds. */
export declare function callEndpoint(socketPath: string, req: EndpointRequest, timeoutMs?: number): Promise<unknown>;