/**
 * HTTP client for proxy mode.
 * Communicates with the primary server to forward tool calls and probe health.
 */
export interface ProbeResult {
    alive: boolean;
    version?: string;
    toolCount?: number;
}
export interface ProxyToolResult {
    content: Array<{
        type: string;
        text: string;
    }>;
    isError?: boolean;
}
/**
 * Probe an existing primary server on the given port.
 * Returns { alive: true } if a healthy godot-mcp-bridge responds.
 */
export declare function probeExistingServer(port: number): Promise<ProbeResult>;
/**
 * Identity of this proxy process, stable for its lifetime. The primary keys its
 * client set on this, so repeated registrations are the same client saying it is
 * still alive rather than a new one arriving.
 */
export declare const PROXY_CLIENT_ID: string;
/**
 * Register this proxy client with the primary and keep re-announcing.
 *
 * The heartbeat is what makes the primary's count self-correcting: the
 * unregister below only runs on a graceful shutdown, so anything harder —
 * SIGKILL, a crash, a host going to sleep — is caught by the entry simply
 * going stale.
 */
export declare function registerProxyClient(port: number): Promise<void>;
/**
 * Unregister this proxy client from the primary and stop the heartbeat.
 */
export declare function unregisterProxyClient(port: number): Promise<void>;
/**
 * Forward a tool call to the primary server.
 * Timeout is generous because Godot tool execution can be slow.
 */
export declare function proxyToolCall(port: number, name: string, args: Record<string, unknown>, timeoutMs: number): Promise<ProxyToolResult>;
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