diff --git a/apps/stage-tamagotchi/electron.vite.config.ts b/apps/stage-tamagotchi/electron.vite.config.ts
index 68b99304f..b37474c62 100644
--- a/apps/stage-tamagotchi/electron.vite.config.ts
+++ b/apps/stage-tamagotchi/electron.vite.config.ts
@@ -1,7 +1,4 @@
-import type { UserConfig } from 'electron-vite'
-
 import { join, resolve } from 'node:path'
-import { env } from 'node:process'
 
 import VueI18n from '@intlify/unplugin-vue-i18n/vite'
 import templateCompilerOptions from '@tresjs/core/template-compiler-options'
@@ -17,12 +14,12 @@ import VueRouter from 'vue-router/vite'
 
 import { Download } from '@proj-airi/unplugin-fetch'
 import { DownloadLive2DSDK } from '@proj-airi/unplugin-live2d-sdk'
-import { defineConfig, loadEnv } from 'electron-vite'
+import { defineConfig } from 'electron-vite'
 
 const stageUIAssetsRoot = resolve(join(import.meta.dirname, '..', '..', 'packages', 'stage-ui', 'src', 'assets'))
 const sharedCacheDir = resolve(join(import.meta.dirname, '..', '..', '.cache'))
 
-const electronConfig = {
+export default defineConfig({
   main: {
     build: {
       externalizeDeps: {
@@ -261,13 +258,4 @@ const electronConfig = {
       Download('https://dist.ayaka.moe/vrm-models/VRoid-Hub/AvatarSample-B/AvatarSample_B.vrm', 'AvatarSample_B.vrm', 'vrm/models/AvatarSample-B', { parentDir: stageUIAssetsRoot, cacheDir: sharedCacheDir }),
     ],
   },
-} satisfies UserConfig
-
-export default defineConfig(({ mode }) => {
-  // Main-process code reads runtime `process.env`, while electron-vite normally
-  // keeps file-based variables in `import.meta.env`. Load only APP_ values as
-  // soon as the Electron config is evaluated; shell values take priority.
-  Object.assign(env, loadEnv(mode, import.meta.dirname, 'APP_'))
-
-  return electronConfig
 })
diff --git a/apps/stage-tamagotchi/src/main/app/debugger.test.ts b/apps/stage-tamagotchi/src/main/app/debugger.test.ts
deleted file mode 100644
index 735d39be2..000000000
--- a/apps/stage-tamagotchi/src/main/app/debugger.test.ts
+++ /dev/null
@@ -1,85 +0,0 @@
-import { EventEmitter } from 'node:events'
-
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-
-import { openDebugger } from './debugger'
-
-const electronMocks = vi.hoisted(() => ({
-  appendSwitch: vi.fn(),
-  openExternal: vi.fn(),
-}))
-
-const httpMocks = vi.hoisted(() => ({
-  get: vi.fn(),
-}))
-
-vi.mock('electron', () => ({
-  app: {
-    commandLine: {
-      appendSwitch: electronMocks.appendSwitch,
-    },
-  },
-  shell: {
-    openExternal: electronMocks.openExternal,
-  },
-}))
-
-vi.mock('node:http', () => ({
-  default: {
-    get: httpMocks.get,
-  },
-}))
-
-describe('openDebugger', () => {
-  beforeEach(() => {
-    vi.clearAllMocks()
-    process.env.APP_REMOTE_DEBUG = 'true'
-    process.env.APP_REMOTE_DEBUG_PORT = '9250'
-  })
-
-  afterEach(() => {
-    delete process.env.APP_REMOTE_DEBUG
-    delete process.env.APP_REMOTE_DEBUG_PORT
-    delete process.env.APP_REMOTE_DEBUG_NO_OPEN
-  })
-
-  function emitDebuggerTarget() {
-    const response = new EventEmitter()
-    const request = new EventEmitter()
-
-    httpMocks.get.mockImplementation((_url, handleResponse) => {
-      handleResponse(response)
-      return request
-    })
-
-    openDebugger()
-
-    response.emit('data', JSON.stringify([{
-      webSocketDebuggerUrl: 'ws://localhost:9250/devtools/page/renderer',
-    }]))
-    response.emit('end')
-  }
-
-  it('opens the remote inspector unless the developer opts out', () => {
-    emitDebuggerTarget()
-
-    expect(electronMocks.openExternal).toHaveBeenCalledWith(
-      'http://localhost:9250/devtools/inspector.html?ws=localhost:9250/devtools/page/renderer',
-    )
-  })
-
-  it('does not open the remote inspector when APP_REMOTE_DEBUG_NO_OPEN is enabled', () => {
-    process.env.APP_REMOTE_DEBUG_NO_OPEN = 'true'
-
-    emitDebuggerTarget()
-
-    // ROOT CAUSE:
-    //
-    // The existing opt-out flag was only set by automation; the application
-    // never read it, so every development launch still opened the browser.
-    //
-    // Reading the flag keeps CDP available and logged while leaving the
-    // developer's browser alone.
-    expect(electronMocks.openExternal).not.toHaveBeenCalled()
-  })
-})