diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b993358..dfc2bf4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,10 +26,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
         with:
-          version: 10.5.1
+          version: 11.5.2
       - uses: actions/setup-node@v4
         with:
-          node-version: "18.x"
+          node-version: "22.13.0"
           cache: "pnpm"
       - name: Install dependencies
         run: pnpm install && cd frontend && pnpm install
@@ -43,10 +43,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
         with:
-          version: 10.5.1
+          version: 11.5.2
       - uses: actions/setup-node@v4
         with:
-          node-version: "18.x"
+          node-version: "22.13.0"
           cache: "pnpm"
       - name: Install dependencies
         run: pnpm install && cd frontend && pnpm install
diff --git a/Dockerfile b/Dockerfile
index ce5fde7..b6ce79b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,16 +6,16 @@
 # ============================================================================
 
 # ---------- Stage 1: base ----------
-FROM node:20-alpine AS base
+FROM node:22.13-alpine AS base
 RUN apk add --no-cache libc6-compat openssl
 RUN corepack enable pnpm
 
 # ---------- Stage 2: deps ----------
 FROM base AS deps
 WORKDIR /app
-COPY package.json pnpm-lock.yaml ./
+COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
 RUN pnpm install --frozen-lockfile
-COPY frontend/package.json frontend/pnpm-lock.yaml ./frontend/
+COPY frontend/package.json frontend/pnpm-lock.yaml frontend/pnpm-workspace.yaml ./frontend/
 RUN cd frontend && pnpm install --frozen-lockfile --ignore-scripts
 
 # ---------- Stage 3: builder ----------
diff --git a/README.ko.md b/README.ko.md
index 0c3a58a..9e819f8 100644
--- a/README.ko.md
+++ b/README.ko.md
@@ -54,8 +54,8 @@
 
 ### 요구사항
 
-- **Node.js** 18+
-- **pnpm** 8+
+- **Node.js** 22.13+
+- **pnpm** 10+ (프로젝트는 pnpm 11.5.2를 고정 사용)
 - 실행 중인 **LangGraph 서버** (`langgraph dev`)
 
 ### 설치 및 실행
@@ -69,6 +69,8 @@ pnpm launch
 
 `pnpm launch`를 실행하면 대화형 설정 마법사가 시작됩니다: 실행 모드, 인증 모드, LangGraph 서버 URL, LangSmith API 키, 데이터베이스 마이그레이션, 서버 자동 시작.
 
+pnpm을 사용할 수 없거나 고정 버전이 적용되지 않으면 `corepack enable` 실행 후 다시 시도하세요.
+
 > 인증 모드별 상세 설정은 `examples/` 폴더의 예제를 참고하세요.
 
 ### 인증 모드
diff --git a/README.md b/README.md
index e35b989..ee10375 100644
--- a/README.md
+++ b/README.md
@@ -54,8 +54,8 @@ A Next.js web app for interacting with [LangGraph](https://github.com/langchain-
 
 ### Prerequisites
 
-- **Node.js** 18+
-- **pnpm** 8+
+- **Node.js** 22.13+
+- **pnpm** 10+ (the project pins pnpm 11.5.2)
 - A running **LangGraph server** (`langgraph dev`)
 
 ### Installation
@@ -69,6 +69,8 @@ pnpm launch
 
 `pnpm launch` runs an interactive setup wizard: run mode, auth mode, LangGraph server URL, LangSmith API key, database migration, and auto-start.
 
+If pnpm is unavailable or does not use the pinned version, run `corepack enable` and retry.
+
 > See `examples/` for per-mode configuration examples.
 
 ### Auth Modes
diff --git a/docs/QUICK_START.md b/docs/QUICK_START.md
index 313bf92..c8f6086 100644
--- a/docs/QUICK_START.md
+++ b/docs/QUICK_START.md
@@ -4,7 +4,7 @@ The fastest way to get LangGraph Chat UI running locally with no authentication.
 
 ## Prerequisites
 
-- Node.js 18+, pnpm 8+
+- Node.js 22.13+, pnpm 10+ (the project pins pnpm 11.5.2)
 - A LangGraph server running (e.g. `langgraph dev`)
 
 ## Steps
@@ -16,6 +16,8 @@ pnpm install
 pnpm launch   # interactive setup — select "standalone" mode
 ```
 
+If pnpm is unavailable or does not use the pinned version, run `corepack enable` and retry.
+
 Or manually:
 
 ```bash
diff --git a/frontend/.npmrc b/frontend/.npmrc
deleted file mode 100644
index 73e93ed..0000000
--- a/frontend/.npmrc
+++ /dev/null
@@ -1 +0,0 @@
-hoist-pattern=**
diff --git a/frontend/package.json b/frontend/package.json
index c08a247..961586f 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -103,5 +103,8 @@
   "overrides": {
     "react-is": "^19.0.0-rc-69d4b800-20241021"
   },
-  "packageManager": "pnpm@10.5.1"
+  "packageManager": "pnpm@11.5.2",
+  "engines": {
+    "node": ">=22.13.0"
+  }
 }
diff --git a/frontend/pnpm-workspace.yaml b/frontend/pnpm-workspace.yaml
new file mode 100644
index 0000000..28102dd
--- /dev/null
+++ b/frontend/pnpm-workspace.yaml
@@ -0,0 +1,14 @@
+confirmModulesPurge: false
+
+hoistPattern:
+  - "**"
+
+allowBuilds:
+  "@parcel/watcher": true
+  "@prisma/client": true
+  "@prisma/engines": true
+  "@swc/core": true
+  esbuild: true
+  prisma: true
+  sharp: true
+  unrs-resolver: true
diff --git a/frontend/scripts/prisma-generate.mjs b/frontend/scripts/prisma-generate.mjs
index 816a26c..4685dfd 100644
--- a/frontend/scripts/prisma-generate.mjs
+++ b/frontend/scripts/prisma-generate.mjs
@@ -38,7 +38,7 @@ if (schema !== originalSchema) {
 
 // Run prisma generate
 try {
-  execSync("npx prisma generate", {
+  execSync("pnpm exec prisma generate", {
     stdio: "inherit",
     cwd: resolve(__dirname, ".."),
   });
@@ -46,7 +46,7 @@ try {
   console.warn(
     "[prisma-generate] Failed to generate Prisma client. " +
       "This is OK if you are using AUTH_MODE=none (no database required). " +
-      "If you need authentication, check your network/SSL settings and run: npx prisma generate",
+      "If you need authentication, check your network/SSL settings and run: pnpm exec prisma generate",
   );
 
   // Create stub .prisma/client so the bundler can resolve the module.
diff --git a/package.json b/package.json
index 2437bd5..f94bee1 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "description": "Chat UI for LangGraph agents with multiple authentication modes",
   "scripts": {
     "prelaunch": "pnpm install",
-    "launch": "npx tsx scripts/setup.ts",
+    "launch": "tsx scripts/setup.ts",
     "dev": "cd frontend && pnpm dev",
     "build": "cd frontend && pnpm build",
     "start": "cd frontend && pnpm start",
@@ -20,8 +20,9 @@
     "picocolors": "^1.0.0",
     "tsx": "^4.0.0"
   },
+  "packageManager": "pnpm@11.5.2",
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=22.13.0"
   },
   "license": "Apache-2.0"
 }
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
new file mode 100644
index 0000000..5baf7c8
--- /dev/null
+++ b/pnpm-workspace.yaml
@@ -0,0 +1,4 @@
+confirmModulesPurge: false
+
+allowBuilds:
+  esbuild: true
diff --git a/scripts/setup.ts b/scripts/setup.ts
index a2cd002..9e4bb57 100644
--- a/scripts/setup.ts
+++ b/scripts/setup.ts
@@ -1068,8 +1068,8 @@ async function runSetup(config: SetupConfig) {
   if (needsDatabase) {
     s.start(t("settingUpDb"));
     try {
-      await runAsync("npx", ["prisma", "generate"], { cwd: FRONTEND_DIR });
-      await runAsync("npx", ["prisma", "db", "push", "--skip-generate"], { cwd: FRONTEND_DIR });
+      await runAsync("pnpm", ["exec", "prisma", "generate"], { cwd: FRONTEND_DIR });
+      await runAsync("pnpm", ["exec", "prisma", "db", "push", "--skip-generate"], { cwd: FRONTEND_DIR });
       s.stop(t("dbReady"));
     } catch (error) {
       s.stop(LANG === "ko" ? "데이터베이스 설정 실패" : "Failed to setup database");
@@ -1162,10 +1162,10 @@ async function runDevelopment(config: SetupConfig) {
 
   p.log.info(pc.dim(t("pressCtrlC")));
 
-  // Run dev server with minimal output
+  // Run dev server and surface its logs so startup failures are actionable.
   const devProcess = crossSpawn("pnpm", ["dev"], {
     cwd: FRONTEND_DIR,
-    stdio: ["ignore", "ignore", "ignore"],
+    stdio: ["ignore", "inherit", "inherit"],
     env: { ...process.env, NODE_NO_WARNINGS: "1" },
   });
 
@@ -1174,6 +1174,14 @@ async function runDevelopment(config: SetupConfig) {
     process.exit(1);
   });
 
+  devProcess.on("close", (code, signal) => {
+    if (signal) {
+      p.log.error(`Development server exited with signal ${signal}`);
+      process.exit(1);
+    }
+    process.exit(code ?? 1);
+  });
+
   // Handle exit
   process.on("SIGINT", () => {
     devProcess.kill();
@@ -1359,7 +1367,7 @@ ${pc.cyan(`tail -f ${logFile}`)}`,
 
     const startProcess = crossSpawn("pnpm", ["start"], {
       cwd: FRONTEND_DIR,
-      stdio: ["ignore", "ignore", "ignore"],
+      stdio: ["ignore", "inherit", "inherit"],
       env: { ...process.env, NODE_NO_WARNINGS: "1" },
     });
 
@@ -1368,6 +1376,14 @@ ${pc.cyan(`tail -f ${logFile}`)}`,
       process.exit(1);
     });
 
+    startProcess.on("close", (code, signal) => {
+      if (signal) {
+        p.log.error(`Production server exited with signal ${signal}`);
+        process.exit(1);
+      }
+      process.exit(code ?? 1);
+    });
+
     process.on("SIGINT", () => {
       startProcess.kill();
       p.outro(pc.green(LANG === "ko" ? "서버가 중지되었습니다." : "Server stopped."));
@@ -1520,14 +1536,14 @@ function getEnvVarsForProduction(config: SetupConfig): string {
 }
 
 function createDockerfile() {
-  const dockerfile = `FROM node:20-alpine AS base
+  const dockerfile = `FROM node:22.13-alpine AS base
 
 # Install dependencies only when needed
 FROM base AS deps
 RUN apk add --no-cache libc6-compat
 WORKDIR /app
 
-COPY package.json pnpm-lock.yaml* ./
+COPY package.json pnpm-lock.yaml* pnpm-workspace.yaml* ./
 RUN corepack enable pnpm && pnpm i --frozen-lockfile
 
 # Rebuild the source code only when needed