diff --git a/package.json b/package.json
index 326c4d3656..b5665fcdf4 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "private": true,
   "workspaces": [
     "atri",
+    "addons",
     "shiki",
     "shiki/core",
     "shiki/cosmos",
@@ -11,6 +12,7 @@
   ],
   "scripts": {
     "atri": "yarn workspace atri",
+    "addons": "yarn workspace addons",
     "build": "tsc -b && yarn workspace koishi-plugin-eval wrap",
     "build:ci": "tsc -b --listEmittedFiles && yarn workspace koishi-plugin-eval wrap",
     "bump": "ts-node build/bump",
diff --git a/packages/plugin-eval-addons/package.json b/packages/plugin-eval-addons/package.json
index 294a02f688..49e35f0767 100644
--- a/packages/plugin-eval-addons/package.json
+++ b/packages/plugin-eval-addons/package.json
@@ -41,8 +41,12 @@
   },
   "dependencies": {
     "js-yaml": "^3.14.0",
+    "json5": "^2.1.3",
     "koishi-utils": "^3.1.0",
     "simple-git": "^2.20.1",
     "typescript": "^4.0.2"
+  },
+  "devDependencies": {
+    "@types/json5": "^0.0.30"
   }
 }
diff --git a/packages/plugin-eval-addons/src/worker.ts b/packages/plugin-eval-addons/src/worker.ts
index 88bf4afbe0..5e2d6e0ea1 100644
--- a/packages/plugin-eval-addons/src/worker.ts
+++ b/packages/plugin-eval-addons/src/worker.ts
@@ -1,9 +1,10 @@
-import { config, context, internal, WorkerAPI, createContext, response } from 'koishi-plugin-eval/dist/worker'
+import { config, context, internal, WorkerAPI, createContext, response, mapDirectory } from 'koishi-plugin-eval/dist/worker'
 import { promises, readFileSync } from 'fs'
 import { resolve, posix, dirname } from 'path'
 import { User } from 'koishi-core'
-import { Logger } from 'koishi-utils'
+import { Logger, Time, CQCode, Random } from 'koishi-utils'
 import { Config } from '.'
+import json5 from 'json5'
 import ts from 'typescript'
 
 const logger = new Logger('addon')
@@ -57,16 +58,28 @@ interface Module {
   evaluate(): Promise<void>
 }
 
-const builtinIdentifier = 'koishi/addons.ts'
-const builtin = new SyntheticModule(['registerCommand'], function () {
-  this.setExport('registerCommand', function registerCommand(name: string, callback: AddonAction) {
+const root = resolve(process.cwd(), config.moduleRoot)
+const modules: Record<string, Module> = {}
+
+export function createSynthetic(identifier: string, exports: {}) {
+  const module = new SyntheticModule(Object.keys(exports), function () {
+    for (const key in exports) {
+      this.setExport(key, exports[key])
+    }
+  }, { context, identifier })
+  modules[identifier] = module
+  config.addonNames.unshift(identifier)
+}
+
+createSynthetic('koishi/addons.ts', {
+  registerCommand(name: string, callback: AddonAction) {
     commandMap[name] = callback
-  })
-}, { context, identifier: builtinIdentifier })
+  },
+})
 
-const root = resolve(process.cwd(), config.moduleRoot)
-const modules: Record<string, Module> = { [builtinIdentifier]: builtin }
-config.addonNames.unshift(...Object.keys(modules))
+createSynthetic('koishi/utils.ts', {
+  Time, CQCode, Random,
+})
 
 const suffixes = ['', '.ts', '/index.ts']
 const relativeRE = /^\.\.?[\\/]/
@@ -98,7 +111,7 @@ async function linker(specifier: string, { identifier }: Module) {
   throw new Error(`Unable to resolve dependency "${specifier}" in "${identifier}"`)
 }
 
-const json = JSON.parse(readFileSync(resolve(root, 'tsconfig.json'), 'utf8'))
+const json = json5.parse(readFileSync(resolve(root, 'tsconfig.json'), 'utf8'))
 const { options: compilerOptions } = ts.parseJsonConfigFileContent(json, ts.sys, root)
 
 async function loadSource(path: string) {
@@ -124,14 +137,17 @@ async function createModule(path: string) {
   logger.debug('creating module %c', module.identifier)
   await module.link(linker)
   await module.evaluate()
+
+  if (module instanceof SourceTextModule) {
+    internal.setGlobal(path, module.namespace)
+  }
   return module
 }
 
-export default Promise.all(config.addonNames.map(path => createModule(path).then((module) => {
-  internal.setGlobal(path, module.namespace)
-}, (error) => {
+export default Promise.all(config.addonNames.map(path => createModule(path).catch((error) => {
   logger.warn(`cannot load module %c\n` + error.stack, path)
-  delete modules[path]
 }))).then(() => {
   response.commands = Object.keys(commandMap)
+  mapDirectory('koishi/utils/', require.resolve('koishi-utils'))
+  internal.setGlobal('utils', modules['koishi/utils.ts'].namespace)
 })
diff --git a/packages/plugin-eval/src/worker.ts b/packages/plugin-eval/src/worker.ts
index b5dd756bb7..e4a730e58b 100644
--- a/packages/plugin-eval/src/worker.ts
+++ b/packages/plugin-eval/src/worker.ts
@@ -2,6 +2,7 @@ import { Logger, escapeRegExp } from 'koishi-utils'
 import { parentPort, workerData } from 'worker_threads'
 import { InspectOptions, formatWithOptions } from 'util'
 import { findSourceMap } from 'module'
+import { dirname, sep } from 'path'
 
 /* eslint-disable import/first */
 
@@ -119,9 +120,13 @@ export class WorkerAPI {
   }
 }
 
+export function mapDirectory(identifier: string, filename: string) {
+  const path = dirname(findSourceMap(filename).payload.sources[0].slice(7)) + sep
+  pathMapper[identifier] = new RegExp(`(at | \\()${escapeRegExp(path)}`, 'g')
+}
+
 Promise.all(Object.values(config.setupFiles).map(file => require(file).default)).then(() => {
-  const path = findSourceMap(__filename).payload.sources[0].slice(7, -9)
-  pathMapper['koishi/'] = new RegExp(`(at | \\()${escapeRegExp(path)}`, 'g')
+  mapDirectory('koishi/', __filename)
   Object.entries(config.setupFiles).forEach(([name, path]) => {
     const sourceMap = findSourceMap(path)
     if (sourceMap) path = sourceMap.payload.sources[0].slice(7)