export declare const PI_INITIAL_PROMPT_COMMAND_NAME = "botmux-initial-prompt";
export declare const PI_INITIAL_PROMPT_COMMAND = "/botmux-initial-prompt";
export declare const PI_INITIAL_PROMPT_FILE_ENV = "BOTMUX_PI_INITIAL_PROMPT_FILE";
interface PiExtensionCommandContext {
    isIdle(): boolean;
    ui: {
        notify(message: string, level: 'info' | 'warning' | 'error'): void;
    };
}
interface PiExtensionApi {
    registerCommand(name: string, options: {
        description: string;
        handler(args: string, ctx: PiExtensionCommandContext): Promise<void> | void;
    }): void;
    sendUserMessage(content: string, options?: {
        deliverAs: 'followUp';
    }): void;
}
/**
 * Pi expands @file only for launch argv, not for text entered into its TUI.
 * Deferred first prompts therefore use this short, one-shot command: the
 * extension reads the worker-selected file (never a user-supplied path) and
 * submits its full contents through Pi's native user-message API as one turn.
 */
export default function registerBotmuxInitialPromptExtension(pi: PiExtensionApi): void;
export {};
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