elysiajslisted

# ElysiaJS Development Skill Always consult [elysiajs.com/llms.txt](https://elysiajs.com/llms.txt) for code examples and latest API. ## Overview ElysiaJS is a TypeScript framework for building Bun-first (but not limited to Bun) type-safe, high-performance backend servers. This skill provides comprehensive guidance for developing with Elysia, including routing, validation, authentication, plugins, integrations, and deployment. ## When to Use This Skill Trigger this skill when the user asks to: - Create or modify ElysiaJS routes, handlers, or servers - Setup validation with TypeBox or other schema libraries (Zod, Valibot) - Implement authentication (JWT, session-based, macros, guards) - Add plugins (CORS, OpenAPI, Static files, JWT) - Integrate with external services (Drizzle ORM, Better Auth, Next.js, Eden Treaty) - Setup WebSocket endpoints for real-time features - Create unit tests for Elysia instances - Deploy Elysia servers to production ## Quick Start Quick scaffold: ```bash bun create elysia app ``` ### Basic Server ```typescript import { Elysia, t, status } from 'elysia' const app = new Elysia() .get('/', () => 'Hello World') .post('/user', ({ body }) => body, { body: t.Object({ name: t.String(), age: t.Number() }) }) .get('/id/:id', ({ params: { id } }) => { if(id > 1_000_000) return status(404, 'Not Found') return id }, { params: t.Object({ id: t.Number({ minimum: 1