/**
 * LSP Client
 *
 * Manages a single language server process: spawning, initialising,
 * request/notification dispatch, and shutdown.
 *
 * Protocol framing (Content-Length / JSON-RPC) is delegated to the
 * LSPProtocolAdapter so that the underlying library can be swapped.
 */
import type { LSPClientState, LSPServerConfig } from './lsp.types.js';
/**
 * LSP Client — manages a single language server process
 */
export declare class LSPClient {
    private readonly config;
    private connection;
    private readonly projectRoot;
    private state;
    constructor(config: LSPServerConfig, projectRoot: string);
    /**
     * Get the current client state
     */
    getState(): LSPClientState;
    /**
     * Start the language server and send initialize request
     */
    start(): Promise<boolean>;
    /**
     * Send a JSON-RPC request and wait for response
     */
    sendRequest(method: string, params?: unknown): Promise<unknown>;
    /**
     * Send a JSON-RPC notification (no response expected)
     */
    sendNotification(method: string, params?: unknown): void;
    /**
     * Graceful shutdown
     */
    shutdown(): Promise<void>;
    /**
     * Clean up the connection
     */
    private cleanup;
}
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