diff --git a/vite.activities.config.ts b/vite.activities.config.ts
index 8131615..aea9915 100644
--- a/vite.activities.config.ts
+++ b/vite.activities.config.ts
@@ -40,6 +40,8 @@ function activitiesHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-activities',
   server: {
     port: 5181,
     strictPort: true,
diff --git a/vite.castle.config.ts b/vite.castle.config.ts
index d8d2797..d0916eb 100644
--- a/vite.castle.config.ts
+++ b/vite.castle.config.ts
@@ -40,6 +40,8 @@ function castleHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-castle',
   server: {
     port: 5180,
     strictPort: true,
diff --git a/vite.chat.config.ts b/vite.chat.config.ts
index c5b00ac..6965d08 100644
--- a/vite.chat.config.ts
+++ b/vite.chat.config.ts
@@ -35,6 +35,8 @@ function chatHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-chat',
   server: {
     port: 5183,
     strictPort: true,
diff --git a/vite.config.ts b/vite.config.ts
index 716dad6..fd07bc1 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -9,6 +9,8 @@ import { visualizer } from 'rollup-plugin-visualizer'
 
 // https://vite.dev/config/
 export default defineConfig(({ mode }) => ({
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-hub',
   server: {
     port: 5173,
     strictPort: true,
diff --git a/vite.forum.config.ts b/vite.forum.config.ts
index feeea35..756d5c1 100644
--- a/vite.forum.config.ts
+++ b/vite.forum.config.ts
@@ -35,6 +35,8 @@ function forumHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-forum',
   server: {
     port: 5184,
     strictPort: true,
diff --git a/vite.market.config.ts b/vite.market.config.ts
index 5a1a5fe..255d8c0 100644
--- a/vite.market.config.ts
+++ b/vite.market.config.ts
@@ -35,6 +35,8 @@ function marketHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-market',
   server: {
     port: 5185,
     strictPort: true,
diff --git a/vite.tasks.config.ts b/vite.tasks.config.ts
index c939772..3cb15fd 100644
--- a/vite.tasks.config.ts
+++ b/vite.tasks.config.ts
@@ -35,6 +35,8 @@ function tasksHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-tasks',
   server: {
     port: 5186,
     strictPort: true,
diff --git a/vite.wallet.config.ts b/vite.wallet.config.ts
index 31b2a1d..dfa0bd6 100644
--- a/vite.wallet.config.ts
+++ b/vite.wallet.config.ts
@@ -39,6 +39,8 @@ function walletHtmlPlugin(): Plugin {
  */
 export default defineConfig(({ mode }) => ({
   base: process.env.VITE_BASE_PATH || '/',
+  // Per-app dep cache so concurrent dev servers don't race on .vite/deps
+  cacheDir: 'node_modules/.vite-wallet',
   server: {
     port: 5182,
     strictPort: true,