import type { ToolkitOptions, ToolkitResult } from "./lib/types.js";
export interface CreateExtensionOptions extends ToolkitOptions {
    /** Package name for the new extension */
    name: string;
    /** AbortSignal for cancellation */
    signal?: AbortSignal;
    /** Progress callback for streaming status updates */
    onUpdate?: (msg: string) => void;
}
/**
 * Create a new Pi extension from the template, or safely update an existing one.
 *
 * If the target already has toolkit files (detected via manifest), uses safe update
 * logic to preserve user modifications. New directories get a full scaffold.
 *
 * @returns Structured result with file lists and conflict info.
 */
export declare function createExtension(templateDir: string, options: CreateExtensionOptions): Promise<ToolkitResult>;