import type { Command as Program } from 'commander';
import type { $side_effect } from '../../utils/organization/$side_effect';
/**
 * Initializes `agent` command with subcommands for Promptbook CLI utilities.
 *
 * The agent command runs one `.book` source directly through a selected CLI harness:
 * - chat: Run an interactive terminal chat session
 * - exec: Send one message and print the response
 *
 * Note: `$` is used to indicate that this function is not a pure function - it registers a command in the CLI.
 *
 * @private internal function of `promptbookCli`
 */
export declare function $initializeAgentCommand(program: Program): $side_effect;