/**
 * OpenKernel — Plugin SDK
 *
 * Typed helpers for authoring plugins concisely. Provides a fluent
 * PluginBuilder and a definePlugin() shortcut.
 *
 *   const myPlugin = definePlugin('my-plugin')
 *     .version('1.0.0')
 *     .description('Does things')
 *     .subscribe(['MISSION_STARTED'], (e) => console.log(e))
 *     .command('greet', 'Greet someone', async (args) => console.log(args))
 *     .onRegister((kernel) => { ... })
 *     .onDestroy(() => { ... })
 *     .build();
 */
import type { KernelEvent, KernelEventType, KernelLike, Plugin, PluginCommand, EventHandler } from '../types.js';
export interface PluginBuilder {
    version(v: string): this;
    description(d: string): this;
    subscribe(types: KernelEventType[], handler: EventHandler): this;
    command(name: string, description: string, handler: PluginCommand['handler']): this;
    onRegister(fn: (kernel: KernelLike) => void | Promise<void>): this;
    onDestroy(fn: () => void | Promise<void>): this;
    onEvent(handler: (event: KernelEvent) => void | Promise<void>): this;
    build(): Plugin;
}
export declare function definePlugin(name: string): PluginBuilder;