import { Readable } from 'node:stream';
export interface LaunchedProcess {
    pid: number;
    stderr: Readable;
    stop(): Promise<void>;
}
export interface LaunchConfig {
    command: string;
    args: string[];
    env?: Record<string, string>;
}
/**
 * Pure process lifecycle manager. No MCP protocol dependency.
 * Handles spawn, ready detection, and graceful shutdown for locally-launched MCP servers.
 */
export declare class ProcessLauncher {
    /**
     * Launch a child process and return a handle for lifecycle management.
     */
    static launch(config: LaunchConfig): LaunchedProcess;
    /**
     * Wait for a TCP port to become available (listening).
     * Probes the port every 200ms until connection succeeds or timeout.
     */
    static waitForPort(host: string, port: number, timeout: number): Promise<void>;
    /**
     * Wait for any of the given patterns to appear in the stderr stream.
     * Rejects if no pattern matches within timeout.
     */
    static waitForReady(stderr: Readable, patterns: string[], timeout: number): Promise<void>;
}
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