🔧 fix: use system router

CHANGELOG.md

@@ -1,6 +1,7 @@
 # 1.4.22
 Bug fix:
 - ValueError with summary missing types
+- Elysia not using Bun.routes
 
 # 1.4.21 - 4 Jan 2026
 Improvement:

example/a.ts

@@ -1,43 +1,3 @@
-import { Elysia, t } from '../src'
+import { Elysia } from '../src'
 
-export const errorHandler = new Elysia({ name: "error-handler" })
-    .onError(({ code, error, status }) => {
-        switch (code) {
-            case "VALIDATION": {
-            	const allErrors = error.detail
-
-                return status(422, {
-                    status: 422,
-                    message: error.valueError?.message,
-                    details: {
-                        location: error.type,
-                        rejected_value: error.value,
-                        expected: error.expected,
-                    },
-                })
-            }
-            case "NOT_FOUND": {
-                return status(404, {
-                    status: 404,
-                    message: "Route not found",
-                })
-            }
-            default: {
-                const statusCode =
-                    "status" in error
-                        ? (typeof error.status === "number" ? error.status : Number(error.status)) || 500
-                        : 500
-
-                let errMsg = "An error occurred"
-                if (error instanceof Error && error.message) {
-                    errMsg = error.message
-                }
-
-                return status(statusCode, {
-                    status: statusCode,
-                    message: errMsg,
-                })
-            }
-        }
-    })
-    .as("scoped")
+const app = new Elysia().get('/', () => 'a').listen(3000)

src/adapter/bun/index.ts

@@ -84,7 +84,7 @@ const supportedMethods = {
 } as const
 
 const mapRoutes = (app: AnyElysia) => {
-	if (!app.config.aot || !app.config.systemRouter) return undefined
+	if (!app.config.aot || app.config.systemRouter === false) return undefined
 
 	const routes = <Record<string, Function | Record<string, unknown>>>{}
 

src/adapter/utils.ts

@@ -136,7 +136,7 @@ export const responseToSetHeaders = (
 	return set
 }
 
-type CreateHandlerParameter = {
+interface CreateHandlerParameter {
 	mapResponse(
 		response: unknown,
 		set: Context['set'],

src/compose.ts

@@ -3,7 +3,6 @@ import { AnyElysia, Cookie } from './index'
 import { Value, TransformDecodeError } from '@sinclair/typebox/value'
 import {
 	Kind,
-	OptionalKind,
 	TypeBoxError,
 	type TAnySchema,
 	type TSchema
@@ -372,11 +371,9 @@ const matchFnReturn = /(?:return|=>)\s?\S+\(|a(?:sync|wait)/
 
 export const isAsync = (v: Function | HookContainer) => {
 	const isObject = typeof v === 'object'
-
 	if (isObject && v.isAsync !== undefined) return v.isAsync
 
 	const fn = isObject ? v.fn : v
-
 	if (fn.constructor.name === 'AsyncFunction') return true
 
 	const literal: string = fn.toString()
@@ -388,7 +385,6 @@ export const isAsync = (v: Function | HookContainer) => {
 	}
 
 	const result = matchFnReturn.test(literal)
-
 	if (isObject) v.isAsync = result
 
 	return result

src/type-system/utils.ts

@@ -145,6 +145,8 @@ export const fileType = async (
 	const result = await fileTypeFromBlob(file)
 	if (!result) throw new InvalidFileType(name, extension)
 
+	console.log(result, extension)
+
 	if (typeof extension === 'string')
 		if (!checkFileExtension(result.mime, extension))
 			throw new InvalidFileType(name, extension)