API Development with Elysia

Quick Guide: Elysia is a Bun-native HTTP framework with end-to-end type safety. Use method chaining (not separate statements) so TypeScript infers the full route tree. Import t from elysia for TypeBox validation. Export the app type (export type App = typeof app) for Eden Treaty clients. Use status() (not the deprecated error() function) for error responses with type narrowing.

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CRITICAL: Before Using This Skill

All code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering, import type, named constants)

(You MUST use method chaining on the Elysia instance -- separate .get() calls break type inference for Eden Treaty)

(You MUST use status() for error responses -- error() is deprecated since 1.3, prefer status())

(You MUST export the app type (export type App = typeof app) for Eden Treaty client generation)

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