/**
 * Build the shell command string for the copilot-cli provider.
 * Accepts a pre-combined file written by the dispatcher and passes it as a
 * single `@file` reference so copilot reads it directly.
 *
 * Resume behaviour:
 *   - sessionId provided  → --resume <id>
 *   - neither             → fresh session
 */
export declare function buildCopilotCliCommand(combinedFile: string, sessionId?: string, model?: string, sessionName?: string, mcpConfigFile?: string): string;
/**
 * Run a tiny probe prompt against Copilot CLI (via Node exec, not the terminal)
 * and extract the session ID from the JSON output.
 * Used to obtain a real session ID before sending the main prompt.
 */
export declare function probeCopilotSession(cwd: string, log: (msg: string) => void): Promise<string | undefined>;