diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..887e0614
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,444 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  # Discover all projects in the repository and filter by changed files
+  discover:
+    runs-on: ubuntu-latest
+    outputs:
+      node-projects: ${{ steps.filter-projects.outputs.node-projects }}
+      poetry-projects: ${{ steps.filter-projects.outputs.poetry-projects }}
+      uv-projects: ${{ steps.filter-projects.outputs.uv-projects }}
+      pip-projects: ${{ steps.filter-projects.outputs.pip-projects }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get changed files
+        id: changed-files
+        run: |
+          if [ "${{ github.event_name }}" == "pull_request" ]; then
+            # For PRs, compare against the base branch
+            CHANGED_FILES=$(git diff --name-only origin/${{ github.base_ref }}...HEAD | tr '\n' ' ')
+          else
+            # For pushes, compare against the previous commit
+            CHANGED_FILES=$(git diff --name-only HEAD~1...HEAD 2>/dev/null | tr '\n' ' ' || echo "")
+          fi
+          echo "Changed files: $CHANGED_FILES"
+          echo "files=$CHANGED_FILES" >> $GITHUB_OUTPUT
+
+      - name: Find all projects
+        id: find-projects
+        run: |
+          # Find Node.js projects (have package.json but not in node_modules)
+          # Exclude workspace member packages (those listed in a parent package.json workspaces field)
+          NODE_PROJECTS=$(find . -name "package.json" -not -path "*/node_modules/*" -exec dirname {} \; | while read dir; do
+            # Check if this directory is a workspace member of a parent
+            is_workspace_member=false
+            parent_dir=$(dirname "$dir")
+            while [ "$parent_dir" != "." ] && [ "$parent_dir" != "/" ]; do
+              if [ -f "$parent_dir/package.json" ]; then
+                # Check if parent has workspaces field that includes this dir
+                rel_path=$(echo "$dir" | sed "s|^$parent_dir/||")
+                if grep -q '"workspaces"' "$parent_dir/package.json" 2>/dev/null; then
+                  # This is a simplified check - if parent has workspaces, skip this dir
+                  is_workspace_member=true
+                  break
+                fi
+              fi
+              parent_dir=$(dirname "$parent_dir")
+            done
+            if [ "$is_workspace_member" = "false" ]; then
+              echo "$dir"
+            fi
+          done | sort -u | jq -R -s -c 'split("\n") | map(select(length > 0))')
+          echo "node-projects=$NODE_PROJECTS" >> $GITHUB_OUTPUT
+
+          # Find Poetry projects (have poetry.lock)
+          POETRY_PROJECTS=$(find . -name "poetry.lock" -exec dirname {} \; | sort -u | jq -R -s -c 'split("\n") | map(select(length > 0))')
+          echo "poetry-projects=$POETRY_PROJECTS" >> $GITHUB_OUTPUT
+
+          # Find uv projects (have uv.lock)
+          UV_PROJECTS=$(find . -name "uv.lock" -exec dirname {} \; | sort -u | jq -R -s -c 'split("\n") | map(select(length > 0))')
+          echo "uv-projects=$UV_PROJECTS" >> $GITHUB_OUTPUT
+
+          # Find pip projects (have requirements.txt but no poetry.lock or uv.lock)
+          PIP_PROJECTS=$(find . -name "requirements.txt" -exec dirname {} \; | while read dir; do
+            if [ ! -f "$dir/poetry.lock" ] && [ ! -f "$dir/uv.lock" ]; then
+              echo "$dir"
+            fi
+          done | sort -u | jq -R -s -c 'split("\n") | map(select(length > 0))')
+          echo "pip-projects=$PIP_PROJECTS" >> $GITHUB_OUTPUT
+
+      - name: Filter projects by changed files
+        id: filter-projects
+        run: |
+          CHANGED_FILES="${{ steps.changed-files.outputs.files }}"
+          
+          echo "DEBUG: Changed files = '$CHANGED_FILES'"
+          
+          # Store the project lists in variables for proper quoting
+          NODE_ALL='${{ steps.find-projects.outputs.node-projects }}'
+          POETRY_ALL='${{ steps.find-projects.outputs.poetry-projects }}'
+          UV_ALL='${{ steps.find-projects.outputs.uv-projects }}'
+          PIP_ALL='${{ steps.find-projects.outputs.pip-projects }}'
+          
+          echo "DEBUG: NODE_ALL = $NODE_ALL"
+          echo "DEBUG: POETRY_ALL = $POETRY_ALL"
+          echo "DEBUG: UV_ALL = $UV_ALL"
+          echo "DEBUG: PIP_ALL = $PIP_ALL"
+          
+          # If no changed files detected (e.g., first commit), run all projects
+          if [ -z "$CHANGED_FILES" ]; then
+            echo "No changed files detected, running all projects"
+            echo "node-projects=$NODE_ALL" >> $GITHUB_OUTPUT
+            echo "poetry-projects=$POETRY_ALL" >> $GITHUB_OUTPUT
+            echo "uv-projects=$UV_ALL" >> $GITHUB_OUTPUT
+            echo "pip-projects=$PIP_ALL" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+          
+          # Check if CI workflow itself changed - if so, run all projects
+          if echo "$CHANGED_FILES" | grep -qE "(^|[[:space:]])\.github/workflows/ci\.yml([[:space:]]|$)"; then
+            echo "CI workflow changed, running all projects"
+            echo "node-projects=$NODE_ALL" >> $GITHUB_OUTPUT
+            echo "poetry-projects=$POETRY_ALL" >> $GITHUB_OUTPUT
+            echo "uv-projects=$UV_ALL" >> $GITHUB_OUTPUT
+            echo "pip-projects=$PIP_ALL" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+          
+          # Filter projects based on changed files
+          filter_projects() {
+            local projects_json="$1"
+            local matched_projects=""
+            
+            # Parse JSON array and check each project
+            while IFS= read -r project; do
+              [ -z "$project" ] && continue
+              
+              # Remove leading ./ for comparison
+              project_path="${project#./}"
+              
+              # Check if any changed file starts with this project path
+              for changed_file in $CHANGED_FILES; do
+                changed_file_clean="${changed_file#./}"
+                if [[ "$changed_file_clean" == "$project_path"* ]]; then
+                  if [ -z "$matched_projects" ]; then
+                    matched_projects="\"$project\""
+                  else
+                    matched_projects="$matched_projects,\"$project\""
+                  fi
+                  break
+                fi
+              done
+            done < <(echo "$projects_json" | jq -r '.[]')
+            
+            # Return as JSON array
+            echo "[$matched_projects]"
+          }
+          
+          # Filter each project type
+          NODE_FILTERED=$(filter_projects "$NODE_ALL")
+          POETRY_FILTERED=$(filter_projects "$POETRY_ALL")
+          UV_FILTERED=$(filter_projects "$UV_ALL")
+          PIP_FILTERED=$(filter_projects "$PIP_ALL")
+          
+          echo "node-projects=$NODE_FILTERED" >> $GITHUB_OUTPUT
+          echo "poetry-projects=$POETRY_FILTERED" >> $GITHUB_OUTPUT
+          echo "uv-projects=$UV_FILTERED" >> $GITHUB_OUTPUT
+          echo "pip-projects=$PIP_FILTERED" >> $GITHUB_OUTPUT
+          
+          # Debug output
+          echo "Filtered Node.js projects: $NODE_FILTERED"
+          echo "Filtered Poetry projects: $POETRY_FILTERED"
+          echo "Filtered uv projects: $UV_FILTERED"
+          echo "Filtered pip projects: $PIP_FILTERED"
+
+  # Build and lint Node.js projects
+  node:
+    needs: discover
+    if: ${{ needs.discover.outputs.node-projects != '[]' && needs.discover.outputs.node-projects != '' }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        project: ${{ fromJson(needs.discover.outputs.node-projects) }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - name: Get npm cache directory
+        id: npm-cache-dir
+        shell: bash
+        run: echo "dir=$(npm config get cache)" >> $GITHUB_OUTPUT
+
+      - name: Cache npm dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.npm-cache-dir.outputs.dir }}
+          key: ${{ runner.os }}-node-${{ hashFiles(format('{0}/package-lock.json', matrix.project), format('{0}/package.json', matrix.project)) }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - name: Install dependencies
+        working-directory: ${{ matrix.project }}
+        run: npm install
+
+      - name: Setup environment
+        working-directory: ${{ matrix.project }}
+        run: |
+          # Copy .env.example to .env if .env doesn't exist
+          if [ -f ".env.example" ] && [ ! -f ".env" ]; then
+            echo "Copying .env.example to .env..."
+            cp .env.example .env
+          fi
+
+      - name: Build
+        working-directory: ${{ matrix.project }}
+        run: |
+          # Check if build script exists in package.json
+          if grep -q '"build"' package.json 2>/dev/null; then
+            echo "Running build..."
+            npm run build
+          else
+            echo "No build script found, skipping..."
+          fi
+
+      - name: Lint
+        working-directory: ${{ matrix.project }}
+        run: |
+          # Check if lint script exists in package.json
+          if grep -q '"lint"' package.json 2>/dev/null; then
+            echo "Running lint..."
+            npm run lint
+          else
+            echo "No lint script found, skipping..."
+          fi
+
+  # Build and lint Poetry projects
+  poetry:
+    needs: discover
+    if: ${{ needs.discover.outputs.poetry-projects != '[]' && needs.discover.outputs.poetry-projects != '' }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        project: ${{ fromJson(needs.discover.outputs.poetry-projects) }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install Poetry
+        uses: snok/install-poetry@v1
+        with:
+          version: latest
+          virtualenvs-create: true
+          virtualenvs-in-project: true
+
+      - name: Cache Poetry dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ matrix.project }}/.venv
+          key: ${{ runner.os }}-poetry-${{ hashFiles(format('{0}/poetry.lock', matrix.project)) }}
+          restore-keys: |
+            ${{ runner.os }}-poetry-
+
+      - name: Install dependencies
+        working-directory: ${{ matrix.project }}
+        run: poetry install --no-interaction
+
+      - name: Setup environment
+        working-directory: ${{ matrix.project }}
+        run: |
+          # Copy .env.example to .env if .env doesn't exist
+          if [ -f ".env.example" ] && [ ! -f ".env" ]; then
+            echo "Copying .env.example to .env..."
+            cp .env.example .env
+          fi
+
+      - name: Lint with ruff (if available)
+        working-directory: ${{ matrix.project }}
+        run: |
+          if poetry run python -c "import ruff" 2>/dev/null; then
+            echo "Running ruff..."
+            poetry run ruff check .
+          elif poetry run python -c "import flake8" 2>/dev/null; then
+            echo "Running flake8..."
+            poetry run flake8 .
+          else
+            echo "No Python linter found, skipping..."
+          fi
+
+      - name: Type check with mypy (if available)
+        working-directory: ${{ matrix.project }}
+        run: |
+          if poetry run python -c "import mypy" 2>/dev/null; then
+            echo "Running mypy..."
+            poetry run mypy .
+          else
+            echo "No type checker found, skipping..."
+          fi
+
+  # Build and lint uv projects
+  uv:
+    needs: discover
+    if: ${{ needs.discover.outputs.uv-projects != '[]' && needs.discover.outputs.uv-projects != '' }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        project: ${{ fromJson(needs.discover.outputs.uv-projects) }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+
+      - name: Install dependencies
+        working-directory: ${{ matrix.project }}
+        run: uv sync
+
+      - name: Setup environment
+        working-directory: ${{ matrix.project }}
+        run: |
+          # Copy .env.example to .env if .env doesn't exist
+          if [ -f ".env.example" ] && [ ! -f ".env" ]; then
+            echo "Copying .env.example to .env..."
+            cp .env.example .env
+          fi
+
+      - name: Lint with ruff (if available)
+        working-directory: ${{ matrix.project }}
+        run: |
+          if uv run python -c "import ruff" 2>/dev/null; then
+            echo "Running ruff..."
+            uv run ruff check .
+          elif uv run python -c "import flake8" 2>/dev/null; then
+            echo "Running flake8..."
+            uv run flake8 .
+          else
+            echo "No Python linter found, skipping..."
+          fi
+
+      - name: Type check with mypy (if available)
+        working-directory: ${{ matrix.project }}
+        run: |
+          if uv run python -c "import mypy" 2>/dev/null; then
+            echo "Running mypy..."
+            uv run mypy .
+          else
+            echo "No type checker found, skipping..."
+          fi
+
+  # Build and lint pip projects
+  pip:
+    needs: discover
+    if: ${{ needs.discover.outputs.pip-projects != '[]' && needs.discover.outputs.pip-projects != '' }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        project: ${{ fromJson(needs.discover.outputs.pip-projects) }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Detect Python version
+        id: python-version
+        working-directory: ${{ matrix.project }}
+        run: |
+          if [ -f ".python-version" ]; then
+            VERSION=$(cat .python-version | tr -d '[:space:]')
+            echo "version=$VERSION" >> $GITHUB_OUTPUT
+          else
+            echo "version=3.12" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ steps.python-version.outputs.version }}
+
+      - name: Cache pip dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles(format('{0}/requirements.txt', matrix.project)) }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Install dependencies
+        working-directory: ${{ matrix.project }}
+        run: |
+          python -m pip install --upgrade pip
+          # Use project-level pip.conf if it exists
+          if [ -f "pip.conf" ]; then
+            export PIP_CONFIG_FILE="$(pwd)/pip.conf"
+          fi
+          pip install -r requirements.txt
+
+      - name: Setup environment
+        working-directory: ${{ matrix.project }}
+        run: |
+          # Copy .env.example to .env if .env doesn't exist
+          if [ -f ".env.example" ] && [ ! -f ".env" ]; then
+            echo "Copying .env.example to .env..."
+            cp .env.example .env
+          fi
+
+      - name: Install linters
+        run: pip install ruff
+
+      - name: Lint with ruff
+        working-directory: ${{ matrix.project }}
+        run: |
+          echo "Running ruff..."
+          ruff check .
+
+  # Summary job to ensure all checks passed
+  ci-success:
+    needs: [node, poetry, uv, pip]
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check all jobs passed
+        run: |
+          # Check each job result - 'skipped' is OK (no projects to build)
+          # 'success' is OK, 'failure' is not OK
+          NODE_RESULT="${{ needs.node.result }}"
+          POETRY_RESULT="${{ needs.poetry.result }}"
+          UV_RESULT="${{ needs.uv.result }}"
+          PIP_RESULT="${{ needs.pip.result }}"
+          
+          echo "Node job result: $NODE_RESULT"
+          echo "Poetry job result: $POETRY_RESULT"
+          echo "uv job result: $UV_RESULT"
+          echo "pip job result: $PIP_RESULT"
+          
+          if [ "$NODE_RESULT" == "failure" ] || \
+             [ "$POETRY_RESULT" == "failure" ] || \
+             [ "$UV_RESULT" == "failure" ] || \
+             [ "$PIP_RESULT" == "failure" ]; then
+            echo "One or more jobs failed"
+            exit 1
+          fi
+          echo "All CI checks passed!"
diff --git a/asynchronous-authorization/langchain-fastapi-py/backend/uv.toml b/asynchronous-authorization/langchain-fastapi-py/backend/uv.toml
new file mode 100644
index 00000000..7b83065b
--- /dev/null
+++ b/asynchronous-authorization/langchain-fastapi-py/backend/uv.toml
@@ -0,0 +1 @@
+index-url = "https://pypi.org/simple/"
diff --git a/asynchronous-authorization/langchain-fastapi-py/frontend/eslint.config.js b/asynchronous-authorization/langchain-fastapi-py/frontend/eslint.config.js
index d94e7deb..e14f09f5 100644
--- a/asynchronous-authorization/langchain-fastapi-py/frontend/eslint.config.js
+++ b/asynchronous-authorization/langchain-fastapi-py/frontend/eslint.config.js
@@ -19,5 +19,9 @@ export default tseslint.config([
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'warn',
+      'react-refresh/only-export-components': 'warn',
+    },
   },
 ])
diff --git a/asynchronous-authorization/langchain-fastapi-py/frontend/package-lock.json b/asynchronous-authorization/langchain-fastapi-py/frontend/package-lock.json
index d04b87de..b725f8f0 100644
--- a/asynchronous-authorization/langchain-fastapi-py/frontend/package-lock.json
+++ b/asynchronous-authorization/langchain-fastapi-py/frontend/package-lock.json
@@ -39,6 +39,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/node": "^22.10.0",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -2544,6 +2545,16 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "22.19.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.2.tgz",
+      "integrity": "sha512-LPM2G3Syo1GLzXLGJAKdqoU35XvrWzGJ21/7sgZTUpbkBaOasTj8tjwn6w+hCkqaa1TfJ/w67rJSwYItlJ2mYw==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.2.2",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.2.tgz",
@@ -6465,6 +6476,13 @@
         "node": "*"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "devOptional": true,
+      "license": "MIT"
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
diff --git a/asynchronous-authorization/langchain-fastapi-py/frontend/package.json b/asynchronous-authorization/langchain-fastapi-py/frontend/package.json
index 13b2176b..5e832de9 100644
--- a/asynchronous-authorization/langchain-fastapi-py/frontend/package.json
+++ b/asynchronous-authorization/langchain-fastapi-py/frontend/package.json
@@ -41,6 +41,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/node": "^22.10.0",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/asynchronous-authorization/langchain-fastapi-py/frontend/src/components/chat-window.tsx b/asynchronous-authorization/langchain-fastapi-py/frontend/src/components/chat-window.tsx
index a3d32c27..9974e52b 100644
--- a/asynchronous-authorization/langchain-fastapi-py/frontend/src/components/chat-window.tsx
+++ b/asynchronous-authorization/langchain-fastapi-py/frontend/src/components/chat-window.tsx
@@ -19,7 +19,7 @@ function ChatMessages(props: {
 }) {
   return (
     <div className="flex flex-col max-w-[768px] mx-auto pb-12 w-full">
-      {props.messages.map((m, i) => {
+      {props.messages.map((m) => {
         return (
           <ChatMessageBubble key={m.id} message={m} aiEmoji={props.aiEmoji} />
         );
@@ -124,7 +124,7 @@ export function ChatWindow(props: {
   const [threadId, setThreadId] = useQueryState("threadId");
   const [input, setInput] = useState("");
 
-  const fetchWithCredentials = (url, options = {}) => {
+  const fetchWithCredentials = (url: string, options: RequestInit = {}) => {
     return fetch(url, {
       ...options,
       credentials: "include",
diff --git a/asynchronous-authorization/langchain-fastapi-py/frontend/tsconfig.node.json b/asynchronous-authorization/langchain-fastapi-py/frontend/tsconfig.node.json
index f85a3990..351d6b68 100644
--- a/asynchronous-authorization/langchain-fastapi-py/frontend/tsconfig.node.json
+++ b/asynchronous-authorization/langchain-fastapi-py/frontend/tsconfig.node.json
@@ -5,6 +5,7 @@
     "lib": ["ES2023"],
     "module": "ESNext",
     "skipLibCheck": true,
+    "types": ["node"],
 
     /* Bundler mode */
     "moduleResolution": "bundler",
diff --git a/asynchronous-authorization/langchain-fastapi-py/frontend/vite.config.ts b/asynchronous-authorization/langchain-fastapi-py/frontend/vite.config.ts
index aa58c10f..d54ca6ae 100644
--- a/asynchronous-authorization/langchain-fastapi-py/frontend/vite.config.ts
+++ b/asynchronous-authorization/langchain-fastapi-py/frontend/vite.config.ts
@@ -1,4 +1,4 @@
-import path from "path";
+import { fileURLToPath, URL } from "node:url";
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 import tailwindcss from "@tailwindcss/vite";
@@ -8,7 +8,7 @@ export default defineConfig({
   plugins: [react(), tailwindcss()],
   resolve: {
     alias: {
-      "@": path.resolve(__dirname, "./src"),
+      "@": fileURLToPath(new URL("./src", import.meta.url)),
     },
   },
 });
diff --git a/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/poetry.toml b/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/poetry.toml
new file mode 100644
index 00000000..e028e1ce
--- /dev/null
+++ b/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/poetry.toml
@@ -0,0 +1,4 @@
+[repositories]
+[repositories.pypi]
+url = "https://pypi.org/simple/"
+default = true
diff --git a/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/src/api/server.py b/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/src/api/server.py
index f6634b62..305bd314 100644
--- a/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/src/api/server.py
+++ b/auth-for-mcp/fastmcp-mcp-customtokenexchange-python/src/api/server.py
@@ -60,7 +60,7 @@ async def dispatch(self, request: Request, call_next):
         except VerifyAccessTokenError as e:
             logger.info(f"Token verification failed: {e}")
             return self._error_response("invalid_token", str(e))
-        except Exception as e:
+        except Exception:
             logger.exception("Unexpected error in middleware")
             return self._error_response("server_error", "Internal server error", 500)
 
diff --git a/auth-for-mcp/fastmcp-mcp-python/poetry.toml b/auth-for-mcp/fastmcp-mcp-python/poetry.toml
new file mode 100644
index 00000000..e028e1ce
--- /dev/null
+++ b/auth-for-mcp/fastmcp-mcp-python/poetry.toml
@@ -0,0 +1,4 @@
+[repositories]
+[repositories.pypi]
+url = "https://pypi.org/simple/"
+default = true
diff --git a/auth-for-mcp/hono-mcp-js/src/tools.ts b/auth-for-mcp/hono-mcp-js/src/tools.ts
index c725144e..f783537a 100644
--- a/auth-for-mcp/hono-mcp-js/src/tools.ts
+++ b/auth-for-mcp/hono-mcp-js/src/tools.ts
@@ -55,6 +55,7 @@ export const registerTools = (
     {
       title: "Whoami Tool",
       description: "Returns the authenticated user's information",
+      inputSchema: emptyToolInputSchema,
       annotations: { readOnlyHint: false },
     },
     (args, extra) =>
diff --git a/auth-for-mcp/nextjs-mcp-js/.env.example b/auth-for-mcp/nextjs-mcp-js/.env.example
index 804d31a8..005cc509 100644
--- a/auth-for-mcp/nextjs-mcp-js/.env.example
+++ b/auth-for-mcp/nextjs-mcp-js/.env.example
@@ -1,3 +1,3 @@
-AUTH0_DOMAIN=
-AUTH0_AUDIENCE=
+AUTH0_DOMAIN=example-tenant.us.auth0.com
+AUTH0_AUDIENCE=http://localhost:3000/
 MCP_SERVER_URL=http://localhost:3000
\ No newline at end of file
diff --git a/auth-for-mcp/nextjs-mcp-js/tsconfig.json b/auth-for-mcp/nextjs-mcp-js/tsconfig.json
index 05342897..6d3e4d4c 100644
--- a/auth-for-mcp/nextjs-mcp-js/tsconfig.json
+++ b/auth-for-mcp/nextjs-mcp-js/tsconfig.json
@@ -15,8 +15,6 @@
     "skipLibCheck": true,
     "strict": true,
     "target": "ES2022",
-    "outDir": "dist",
-    "rootDir": "src",
     "allowJs": true,
     "noEmit": true,
     "jsx": "preserve",
diff --git a/auth-for-mcp/xmcp-mcp-tokenvault-js/.env.example b/auth-for-mcp/xmcp-mcp-tokenvault-js/.env.example
index 03cd73a2..0a405612 100644
--- a/auth-for-mcp/xmcp-mcp-tokenvault-js/.env.example
+++ b/auth-for-mcp/xmcp-mcp-tokenvault-js/.env.example
@@ -1,9 +1,10 @@
-AUTH0_DOMAIN=
-AUTH0_AUDIENCE=
-AUTH0_CLIENT_ID=
+AUTH0_DOMAIN=your-tenant.us.auth0.com
+AUTH0_AUDIENCE=http://localhost:3001/mcp
+AUTH0_CLIENT_ID="{yourClientId}"
+
 
 # One of the ways to authorize your client
-AUTH0_CLIENT_SECRET= 
+AUTH0_CLIENT_SECRET="{yourClientSecret}"
 
 PORT=3001
 MCP_SERVER_URL=http://localhost:3001
diff --git a/authenticate-users/langchain-fastapi-py-starter/backend/uv.toml b/authenticate-users/langchain-fastapi-py-starter/backend/uv.toml
new file mode 100644
index 00000000..7b83065b
--- /dev/null
+++ b/authenticate-users/langchain-fastapi-py-starter/backend/uv.toml
@@ -0,0 +1 @@
+index-url = "https://pypi.org/simple/"
diff --git a/authenticate-users/langchain-fastapi-py-starter/frontend/eslint.config.js b/authenticate-users/langchain-fastapi-py-starter/frontend/eslint.config.js
index d94e7deb..96d86130 100644
--- a/authenticate-users/langchain-fastapi-py-starter/frontend/eslint.config.js
+++ b/authenticate-users/langchain-fastapi-py-starter/frontend/eslint.config.js
@@ -1,23 +1,27 @@
-import js from '@eslint/js'
-import globals from 'globals'
-import reactHooks from 'eslint-plugin-react-hooks'
-import reactRefresh from 'eslint-plugin-react-refresh'
-import tseslint from 'typescript-eslint'
-import { globalIgnores } from 'eslint/config'
+import js from "@eslint/js";
+import globals from "globals";
+import reactHooks from "eslint-plugin-react-hooks";
+import reactRefresh from "eslint-plugin-react-refresh";
+import tseslint from "typescript-eslint";
+import { globalIgnores } from "eslint/config";
 
 export default tseslint.config([
-  globalIgnores(['dist']),
+  globalIgnores(["dist"]),
   {
-    files: ['**/*.{ts,tsx}'],
+    files: ["**/*.{ts,tsx}"],
     extends: [
       js.configs.recommended,
       tseslint.configs.recommended,
-      reactHooks.configs['recommended-latest'],
+      reactHooks.configs["recommended-latest"],
       reactRefresh.configs.vite,
     ],
     languageOptions: {
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      "@typescript-eslint/no-explicit-any": "warn",
+      "react-refresh/only-export-components": "warn",
+    },
   },
-])
+]);
diff --git a/authenticate-users/langchain-fastapi-py-starter/frontend/package-lock.json b/authenticate-users/langchain-fastapi-py-starter/frontend/package-lock.json
index 8dff276f..71419f7c 100644
--- a/authenticate-users/langchain-fastapi-py-starter/frontend/package-lock.json
+++ b/authenticate-users/langchain-fastapi-py-starter/frontend/package-lock.json
@@ -39,6 +39,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/node": "^22.10.0",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -2603,6 +2604,16 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "22.19.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.2.tgz",
+      "integrity": "sha512-LPM2G3Syo1GLzXLGJAKdqoU35XvrWzGJ21/7sgZTUpbkBaOasTj8tjwn6w+hCkqaa1TfJ/w67rJSwYItlJ2mYw==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.1.8",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.8.tgz",
@@ -6523,6 +6534,13 @@
         "node": "*"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "devOptional": true,
+      "license": "MIT"
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
diff --git a/authenticate-users/langchain-fastapi-py-starter/frontend/package.json b/authenticate-users/langchain-fastapi-py-starter/frontend/package.json
index 13b2176b..5e832de9 100644
--- a/authenticate-users/langchain-fastapi-py-starter/frontend/package.json
+++ b/authenticate-users/langchain-fastapi-py-starter/frontend/package.json
@@ -41,6 +41,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/node": "^22.10.0",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/authenticate-users/langchain-fastapi-py-starter/frontend/src/components/chat-window.tsx b/authenticate-users/langchain-fastapi-py-starter/frontend/src/components/chat-window.tsx
index a3d32c27..15ca4e0d 100644
--- a/authenticate-users/langchain-fastapi-py-starter/frontend/src/components/chat-window.tsx
+++ b/authenticate-users/langchain-fastapi-py-starter/frontend/src/components/chat-window.tsx
@@ -1,16 +1,16 @@
+import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
+import { useQueryState } from "nuqs";
 import { useState } from "react";
-import type { FormEvent, ReactNode } from "react";
 import { toast } from "sonner";
 import { StickToBottom, useStickToBottomContext } from "use-stick-to-bottom";
-import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
-import { useQueryState } from "nuqs";
-import { useStream } from "@langchain/langgraph-sdk/react";
-import { type Message } from "@langchain/langgraph-sdk";
 
 import { ChatMessageBubble } from "@/components/chat-message-bubble";
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
+import { useStream } from "@langchain/langgraph-sdk/react";
 
+import type { Message } from "@langchain/langgraph-sdk";
+import type { FormEvent, ReactNode } from "react";
 function ChatMessages(props: {
   messages: Message[];
   emptyStateComponent: ReactNode;
@@ -19,7 +19,7 @@ function ChatMessages(props: {
 }) {
   return (
     <div className="flex flex-col max-w-[768px] mx-auto pb-12 w-full">
-      {props.messages.map((m, i) => {
+      {props.messages.map((m) => {
         return (
           <ChatMessageBubble key={m.id} message={m} aiEmoji={props.aiEmoji} />
         );
@@ -124,7 +124,7 @@ export function ChatWindow(props: {
   const [threadId, setThreadId] = useQueryState("threadId");
   const [input, setInput] = useState("");
 
-  const fetchWithCredentials = (url, options = {}) => {
+  const fetchWithCredentials = (url: string, options: RequestInit = {}) => {
     return fetch(url, {
       ...options,
       credentials: "include",
@@ -163,7 +163,7 @@ export function ChatWindow(props: {
             { type: "human", content: input, id: "temp" },
           ],
         }),
-      },
+      }
     );
     setInput("");
   }
diff --git a/authenticate-users/langchain-fastapi-py-starter/frontend/tsconfig.node.json b/authenticate-users/langchain-fastapi-py-starter/frontend/tsconfig.node.json
index f85a3990..351d6b68 100644
--- a/authenticate-users/langchain-fastapi-py-starter/frontend/tsconfig.node.json
+++ b/authenticate-users/langchain-fastapi-py-starter/frontend/tsconfig.node.json
@@ -5,6 +5,7 @@
     "lib": ["ES2023"],
     "module": "ESNext",
     "skipLibCheck": true,
+    "types": ["node"],
 
     /* Bundler mode */
     "moduleResolution": "bundler",
diff --git a/authenticate-users/langchain-fastapi-py-starter/frontend/vite.config.ts b/authenticate-users/langchain-fastapi-py-starter/frontend/vite.config.ts
index aa58c10f..e1e6c83c 100644
--- a/authenticate-users/langchain-fastapi-py-starter/frontend/vite.config.ts
+++ b/authenticate-users/langchain-fastapi-py-starter/frontend/vite.config.ts
@@ -1,14 +1,15 @@
-import path from "path";
+import { fileURLToPath, URL } from "node:url";
 import { defineConfig } from "vite";
-import react from "@vitejs/plugin-react";
+
 import tailwindcss from "@tailwindcss/vite";
+import react from "@vitejs/plugin-react";
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
   resolve: {
     alias: {
-      "@": path.resolve(__dirname, "./src"),
+      "@": fileURLToPath(new URL("./src", import.meta.url)),
     },
   },
 });
diff --git a/authenticate-users/langchain-fastapi-py/backend/uv.toml b/authenticate-users/langchain-fastapi-py/backend/uv.toml
new file mode 100644
index 00000000..7b83065b
--- /dev/null
+++ b/authenticate-users/langchain-fastapi-py/backend/uv.toml
@@ -0,0 +1 @@
+index-url = "https://pypi.org/simple/"
diff --git a/authenticate-users/langchain-fastapi-py/frontend/eslint.config.js b/authenticate-users/langchain-fastapi-py/frontend/eslint.config.js
index d94e7deb..858fb5e2 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/eslint.config.js
+++ b/authenticate-users/langchain-fastapi-py/frontend/eslint.config.js
@@ -19,5 +19,11 @@ export default tseslint.config([
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/no-unused-expressions': 'warn',
+      '@typescript-eslint/no-non-null-asserted-optional-chain': 'warn',
+      'react-refresh/only-export-components': 'warn',
+    },
   },
 ])
diff --git a/authenticate-users/langchain-fastapi-py/frontend/package-lock.json b/authenticate-users/langchain-fastapi-py/frontend/package-lock.json
index 16793063..d55a3bc4 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/package-lock.json
+++ b/authenticate-users/langchain-fastapi-py/frontend/package-lock.json
@@ -40,6 +40,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/node": "^22.15.32",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -2550,6 +2551,16 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "22.19.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.2.tgz",
+      "integrity": "sha512-LPM2G3Syo1GLzXLGJAKdqoU35XvrWzGJ21/7sgZTUpbkBaOasTj8tjwn6w+hCkqaa1TfJ/w67rJSwYItlJ2mYw==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.1.8",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.8.tgz",
@@ -6480,6 +6491,13 @@
         "node": "*"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "devOptional": true,
+      "license": "MIT"
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
diff --git a/authenticate-users/langchain-fastapi-py/frontend/package.json b/authenticate-users/langchain-fastapi-py/frontend/package.json
index ed6aa04f..b814e49b 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/package.json
+++ b/authenticate-users/langchain-fastapi-py/frontend/package.json
@@ -42,6 +42,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/node": "^22.15.32",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/authenticate-users/langchain-fastapi-py/frontend/src/components/chat-window.tsx b/authenticate-users/langchain-fastapi-py/frontend/src/components/chat-window.tsx
index a3d32c27..9974e52b 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/src/components/chat-window.tsx
+++ b/authenticate-users/langchain-fastapi-py/frontend/src/components/chat-window.tsx
@@ -19,7 +19,7 @@ function ChatMessages(props: {
 }) {
   return (
     <div className="flex flex-col max-w-[768px] mx-auto pb-12 w-full">
-      {props.messages.map((m, i) => {
+      {props.messages.map((m) => {
         return (
           <ChatMessageBubble key={m.id} message={m} aiEmoji={props.aiEmoji} />
         );
@@ -124,7 +124,7 @@ export function ChatWindow(props: {
   const [threadId, setThreadId] = useQueryState("threadId");
   const [input, setInput] = useState("");
 
-  const fetchWithCredentials = (url, options = {}) => {
+  const fetchWithCredentials = (url: string, options: RequestInit = {}) => {
     return fetch(url, {
       ...options,
       credentials: "include",
diff --git a/authenticate-users/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx b/authenticate-users/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx
index 9e491167..beb64570 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx
+++ b/authenticate-users/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx
@@ -1,6 +1,6 @@
 import { format } from "date-fns";
 import { LogIn, UserPlus } from "lucide-react";
-import { ReactNode } from "react";
+import type { ReactNode } from "react";
 
 import DocumentItemActions from "@/components/document-item-actions";
 import DocumentUploadForm from "@/components/document-upload-form";
diff --git a/authenticate-users/langchain-fastapi-py/frontend/tsconfig.node.json b/authenticate-users/langchain-fastapi-py/frontend/tsconfig.node.json
index f85a3990..9e3d9ab2 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/tsconfig.node.json
+++ b/authenticate-users/langchain-fastapi-py/frontend/tsconfig.node.json
@@ -3,6 +3,7 @@
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
     "target": "ES2023",
     "lib": ["ES2023"],
+    "types": ["node"],
     "module": "ESNext",
     "skipLibCheck": true,
 
diff --git a/authenticate-users/langchain-fastapi-py/frontend/vite.config.ts b/authenticate-users/langchain-fastapi-py/frontend/vite.config.ts
index aa58c10f..2f65d30e 100644
--- a/authenticate-users/langchain-fastapi-py/frontend/vite.config.ts
+++ b/authenticate-users/langchain-fastapi-py/frontend/vite.config.ts
@@ -1,4 +1,4 @@
-import path from "path";
+import { fileURLToPath } from "url";
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 import tailwindcss from "@tailwindcss/vite";
@@ -8,7 +8,7 @@ export default defineConfig({
   plugins: [react(), tailwindcss()],
   resolve: {
     alias: {
-      "@": path.resolve(__dirname, "./src"),
+      "@": fileURLToPath(new URL("./src", import.meta.url)),
     },
   },
 });
diff --git a/authorization-for-rag/langchain-fastapi-py/backend/uv.toml b/authorization-for-rag/langchain-fastapi-py/backend/uv.toml
new file mode 100644
index 00000000..7b83065b
--- /dev/null
+++ b/authorization-for-rag/langchain-fastapi-py/backend/uv.toml
@@ -0,0 +1 @@
+index-url = "https://pypi.org/simple/"
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/eslint.config.js b/authorization-for-rag/langchain-fastapi-py/frontend/eslint.config.js
index d94e7deb..96d86130 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/eslint.config.js
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/eslint.config.js
@@ -1,23 +1,27 @@
-import js from '@eslint/js'
-import globals from 'globals'
-import reactHooks from 'eslint-plugin-react-hooks'
-import reactRefresh from 'eslint-plugin-react-refresh'
-import tseslint from 'typescript-eslint'
-import { globalIgnores } from 'eslint/config'
+import js from "@eslint/js";
+import globals from "globals";
+import reactHooks from "eslint-plugin-react-hooks";
+import reactRefresh from "eslint-plugin-react-refresh";
+import tseslint from "typescript-eslint";
+import { globalIgnores } from "eslint/config";
 
 export default tseslint.config([
-  globalIgnores(['dist']),
+  globalIgnores(["dist"]),
   {
-    files: ['**/*.{ts,tsx}'],
+    files: ["**/*.{ts,tsx}"],
     extends: [
       js.configs.recommended,
       tseslint.configs.recommended,
-      reactHooks.configs['recommended-latest'],
+      reactHooks.configs["recommended-latest"],
       reactRefresh.configs.vite,
     ],
     languageOptions: {
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      "@typescript-eslint/no-explicit-any": "warn",
+      "react-refresh/only-export-components": "warn",
+    },
   },
-])
+]);
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/package-lock.json b/authorization-for-rag/langchain-fastapi-py/frontend/package-lock.json
index 16793063..d55a3bc4 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/package-lock.json
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/package-lock.json
@@ -40,6 +40,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/node": "^22.15.32",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -2550,6 +2551,16 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "22.19.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.2.tgz",
+      "integrity": "sha512-LPM2G3Syo1GLzXLGJAKdqoU35XvrWzGJ21/7sgZTUpbkBaOasTj8tjwn6w+hCkqaa1TfJ/w67rJSwYItlJ2mYw==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.1.8",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.8.tgz",
@@ -6480,6 +6491,13 @@
         "node": "*"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "devOptional": true,
+      "license": "MIT"
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/package.json b/authorization-for-rag/langchain-fastapi-py/frontend/package.json
index ed6aa04f..b814e49b 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/package.json
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/package.json
@@ -42,6 +42,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/node": "^22.15.32",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/src/components/chat-window.tsx b/authorization-for-rag/langchain-fastapi-py/frontend/src/components/chat-window.tsx
index a3d32c27..fdda9ec0 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/src/components/chat-window.tsx
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/src/components/chat-window.tsx
@@ -1,16 +1,16 @@
+import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
+import { useQueryState } from "nuqs";
 import { useState } from "react";
-import type { FormEvent, ReactNode } from "react";
 import { toast } from "sonner";
 import { StickToBottom, useStickToBottomContext } from "use-stick-to-bottom";
-import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
-import { useQueryState } from "nuqs";
-import { useStream } from "@langchain/langgraph-sdk/react";
-import { type Message } from "@langchain/langgraph-sdk";
 
 import { ChatMessageBubble } from "@/components/chat-message-bubble";
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
+import type { Message } from "@langchain/langgraph-sdk";
+import { useStream } from "@langchain/langgraph-sdk/react";
 
+import type { FormEvent, ReactNode } from "react";
 function ChatMessages(props: {
   messages: Message[];
   emptyStateComponent: ReactNode;
@@ -19,7 +19,7 @@ function ChatMessages(props: {
 }) {
   return (
     <div className="flex flex-col max-w-[768px] mx-auto pb-12 w-full">
-      {props.messages.map((m, i) => {
+      {props.messages.map((m) => {
         return (
           <ChatMessageBubble key={m.id} message={m} aiEmoji={props.aiEmoji} />
         );
@@ -124,7 +124,7 @@ export function ChatWindow(props: {
   const [threadId, setThreadId] = useQueryState("threadId");
   const [input, setInput] = useState("");
 
-  const fetchWithCredentials = (url, options = {}) => {
+  const fetchWithCredentials = (url: string, options: RequestInit = {}) => {
     return fetch(url, {
       ...options,
       credentials: "include",
@@ -163,7 +163,7 @@ export function ChatWindow(props: {
             { type: "human", content: input, id: "temp" },
           ],
         }),
-      },
+      }
     );
     setInput("");
   }
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-item-actions.tsx b/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-item-actions.tsx
index 38590a92..cb9c252c 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-item-actions.tsx
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-item-actions.tsx
@@ -1,14 +1,15 @@
 import { useState } from "react";
 import { toast } from "sonner";
+
 import { Button } from "@/components/ui/button";
 import {
   Dialog,
+  DialogClose,
   DialogContent,
-  DialogHeader,
-  DialogTitle,
   DialogDescription,
   DialogFooter,
-  DialogClose,
+  DialogHeader,
+  DialogTitle,
   DialogTrigger,
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
@@ -16,8 +17,8 @@ import {
   deleteDocument,
   getDocumentContent,
   shareDocument,
-  type Document,
 } from "@/lib/documents";
+import type { Document } from "@/lib/documents";
 
 interface DocumentItemActionsProps {
   doc: Omit<Document, "content">;
@@ -78,7 +79,7 @@ export default function DocumentItemActions({
     try {
       await shareDocument(doc.id, emailToShare.split(","));
       toast.success(`${doc.fileName} shared with ${emailToShare}.`);
-      onActionComplete && onActionComplete(); // Trigger revalidation
+      onActionComplete?.(); // Trigger revalidation
       setEmailToShare(""); // Reset email input
     } catch (error) {
       console.error("Error sharing document:", error);
@@ -93,7 +94,7 @@ export default function DocumentItemActions({
     try {
       await deleteDocument(doc.id);
       toast.success(`${doc.fileName} deleted successfully.`);
-      onActionComplete && onActionComplete(); // Trigger revalidation
+      onActionComplete?.(); // Trigger revalidation
     } catch (error) {
       console.error("Error deleting document:", error);
       toast.error("Failed to delete document.");
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-upload-form.tsx b/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-upload-form.tsx
index a2258238..6d82b065 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-upload-form.tsx
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/src/components/document-upload-form.tsx
@@ -1,10 +1,11 @@
-import { useState, type FormEvent } from "react";
+import axios from "axios";
+import { useState } from "react";
+import type { FormEvent } from "react";
 import { toast } from "sonner";
 
-import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
 import { apiClient } from "@/lib/api-client";
-import axios from "axios";
 
 interface DocumentUploadFormProps {
   onUploadSuccess?: () => void; // Callback to refresh document list, etc.
@@ -23,7 +24,7 @@ export default function DocumentUploadForm({
       const allowedTypes = ["text/plain", "application/pdf", "text/markdown"];
       if (!allowedTypes.includes(selectedFile.type)) {
         toast.error(
-          "Invalid File Type: Please upload a TXT, PDF, or Markdown file.",
+          "Invalid File Type: Please upload a TXT, PDF, or Markdown file."
         );
         setFile(null);
         event.target.value = ""; // Reset file input
@@ -51,20 +52,23 @@ export default function DocumentUploadForm({
       toast.success(`${file.name} has been uploaded.`);
       setFile(null); // Reset file input
       const fileInput = document.getElementById(
-        "file-upload",
+        "file-upload"
       ) as HTMLInputElement;
       if (fileInput) fileInput.value = "";
-      onUploadSuccess && onUploadSuccess(); // Trigger refresh or other actions
+      onUploadSuccess?.(); // Trigger refresh or other actions
     } catch (error) {
       if (axios.isAxiosError(error)) {
         console.error("Upload error:", error?.response?.data || error);
         toast.error(
-          `Upload error: ${error?.response?.data?.detail || "An unexpected error occurred. Please try again."}`,
+          `Upload error: ${
+            error?.response?.data?.detail ||
+            "An unexpected error occurred. Please try again."
+          }`
         );
       } else {
         console.error("Upload error:", error);
         toast.error(
-          "Upload Error: An unexpected error occurred. Please try again.",
+          "Upload Error: An unexpected error occurred. Please try again."
         );
       }
     }
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx b/authorization-for-rag/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx
index 9e491167..e7e70b9d 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/src/pages/DocumentsPage.tsx
@@ -1,6 +1,5 @@
 import { format } from "date-fns";
 import { LogIn, UserPlus } from "lucide-react";
-import { ReactNode } from "react";
 
 import DocumentItemActions from "@/components/document-item-actions";
 import DocumentUploadForm from "@/components/document-upload-form";
@@ -9,6 +8,8 @@ import { getDocumentsForUser } from "@/lib/documents";
 import useAuth, { getLoginUrl, getSignupUrl } from "@/lib/use-auth";
 import { useQuery, useQueryClient } from "@tanstack/react-query";
 
+import type { ReactNode } from "react";
+
 export default function DocumentsPage() {
   const queryClient = useQueryClient();
   const { user } = useAuth();
@@ -58,7 +59,7 @@ export default function DocumentsPage() {
     if (!sharedWith || sharedWith.length === 0) {
       return <span className="text-sm text-muted-foreground">Not shared</span>;
     }
-    if (sharedWith.includes(user?.email!)) {
+    if (user?.email && sharedWith.includes(user.email)) {
       return <span className="text-sm text-green-500">Shared with you</span>;
     }
     return (
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/tsconfig.node.json b/authorization-for-rag/langchain-fastapi-py/frontend/tsconfig.node.json
index f85a3990..9e3d9ab2 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/tsconfig.node.json
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/tsconfig.node.json
@@ -3,6 +3,7 @@
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
     "target": "ES2023",
     "lib": ["ES2023"],
+    "types": ["node"],
     "module": "ESNext",
     "skipLibCheck": true,
 
diff --git a/authorization-for-rag/langchain-fastapi-py/frontend/vite.config.ts b/authorization-for-rag/langchain-fastapi-py/frontend/vite.config.ts
index aa58c10f..e344c895 100644
--- a/authorization-for-rag/langchain-fastapi-py/frontend/vite.config.ts
+++ b/authorization-for-rag/langchain-fastapi-py/frontend/vite.config.ts
@@ -1,14 +1,15 @@
-import path from "path";
+import { fileURLToPath } from "url";
 import { defineConfig } from "vite";
-import react from "@vitejs/plugin-react";
+
 import tailwindcss from "@tailwindcss/vite";
+import react from "@vitejs/plugin-react";
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
   resolve: {
     alias: {
-      "@": path.resolve(__dirname, "./src"),
+      "@": fileURLToPath(new URL("./src", import.meta.url)),
     },
   },
 });
diff --git a/authorization-for-rag/langchain-next-js/package-lock.json b/authorization-for-rag/langchain-next-js/package-lock.json
index 0a53ea1b..47f8a8b4 100644
--- a/authorization-for-rag/langchain-next-js/package-lock.json
+++ b/authorization-for-rag/langchain-next-js/package-lock.json
@@ -8,6 +8,8 @@
       "name": "auth0-assistant0",
       "version": "0.0.0",
       "dependencies": {
+        "@auth0/ai": "^6.0.0",
+        "@auth0/ai-langchain": "^5.0.0",
         "@auth0/nextjs-auth0": "4.12.1",
         "@langchain/community": "^0.3.55",
         "@langchain/core": "^0.3.78",
@@ -115,6 +117,47 @@
       "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
       "peer": true
     },
+    "node_modules/@auth0/ai": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/@auth0/ai/-/ai-6.0.0.tgz",
+      "integrity": "sha512-izza6cWqcEBp0X/uNp+DOnucpu4jOtuJQgGFWfXfnjt6SL57ANr6JHmJ/+LS77fll8wZcr7K0JVgE3xfk5pXjg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@openfga/sdk": "^0.8.0",
+        "auth0": "^4.30.0",
+        "jose": "^5.9.6",
+        "openid-client": "^6.1.7",
+        "stable-hash": "^0.0.5",
+        "tempbox": "^1.1.1",
+        "zod": "^3.25.76"
+      }
+    },
+    "node_modules/@auth0/ai-langchain": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@auth0/ai-langchain/-/ai-langchain-5.0.0.tgz",
+      "integrity": "sha512-0tfAxXYNzKNNiusAWpFxj/z1JE2PCPLmul7sSpgvJtky3C74WydvuNIEvT2sRA54quLMNaYgImO4G/3izP2y/Q==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@auth0/ai": "*",
+        "langchain": "^0.3.11"
+      },
+      "peerDependencies": {
+        "@langchain/core": "^0.3.72",
+        "@langchain/langgraph": "^0.4.4",
+        "@langchain/langgraph-sdk": "^0.0.109",
+        "@openfga/sdk": "0.8.0",
+        "zod": "^3.25.76"
+      }
+    },
+    "node_modules/@auth0/ai/node_modules/jose": {
+      "version": "5.10.0",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-5.10.0.tgz",
+      "integrity": "sha512-s+3Al/p9g32Iq+oqXxkW//7jk2Vig6FF1CFqzVXoTUXt2qz89YWbL+OwS17NFYEvxC35n0FKeGO2LGYSxeM2Gg==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/@auth0/nextjs-auth0": {
       "version": "4.12.1",
       "resolved": "https://registry.npmjs.org/@auth0/nextjs-auth0/-/nextjs-auth0-4.12.1.tgz",
@@ -2739,12 +2782,24 @@
         "node": ">=12.4.0"
       }
     },
+    "node_modules/@openfga/sdk": {
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/@openfga/sdk/-/sdk-0.8.0.tgz",
+      "integrity": "sha512-tFd5oQ6a3ps8Qbj9V8VhETyKnl7QtQa0o9G9464yI6KAih0FhMg/5e1/T701j6hkeGqGGJCmv1csD/OXyGCpFQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@opentelemetry/api": "^1.9.0",
+        "axios": "^1.7.9",
+        "tiny-async-pool": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=16.15.0"
+      }
+    },
     "node_modules/@opentelemetry/api": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",
       "integrity": "sha512-3giAOQvZiH5F9bMlMiv8+GSPMeqg0dbaeo58/0SlA9sxSqZhnUtxzX9/2FzyhS9sWQf5S0GJE0AKBrFqjpeYcg==",
-      "optional": true,
-      "peer": true,
       "engines": {
         "node": ">=8.0.0"
       }
@@ -4529,8 +4584,49 @@
     "node_modules/asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==",
-      "peer": true
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q=="
+    },
+    "node_modules/auth0": {
+      "version": "4.37.0",
+      "resolved": "https://registry.npmjs.org/auth0/-/auth0-4.37.0.tgz",
+      "integrity": "sha512-+TqJRxh4QvbD4TQIYx1ak2vanykQkG/nIZLuR6o8LoQj425gjVG3tFuUbbOeh/nCpP1rnvU0CCV1ChZHYXLU/A==",
+      "license": "MIT",
+      "dependencies": {
+        "jose": "^4.13.2",
+        "undici-types": "^6.15.0",
+        "uuid": "^9.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/auth0/node_modules/jose": {
+      "version": "4.15.9",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-4.15.9.tgz",
+      "integrity": "sha512-1vUQX+IdDMVPj4k8kOxgUqlcK518yluMuGZwqlr44FS1ppZB/5GWh4rZG89erpOBOJjU/OBsnCVFfapsRz6nEA==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
+    "node_modules/auth0/node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "license": "MIT"
+    },
+    "node_modules/auth0/node_modules/uuid": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-9.0.1.tgz",
+      "integrity": "sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
     },
     "node_modules/autoprefixer": {
       "version": "10.4.21",
@@ -4597,7 +4693,6 @@
       "version": "1.12.2",
       "resolved": "https://registry.npmjs.org/axios/-/axios-1.12.2.tgz",
       "integrity": "sha512-vMJzPewAlRyOgxV2dU0Cuz2O8zzzx9VYtbJOaBgXFeLc4IV/Eg50n4LowmehOOR61S8ZMpc2K5Sa7g6A4jfkUw==",
-      "peer": true,
       "dependencies": {
         "follow-redirects": "^1.15.6",
         "form-data": "^4.0.4",
@@ -5087,7 +5182,6 @@
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
       "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
-      "peer": true,
       "dependencies": {
         "delayed-stream": "~1.0.0"
       },
@@ -5332,7 +5426,6 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
       "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
-      "peer": true,
       "engines": {
         "node": ">=0.4.0"
       }
@@ -6461,7 +6554,6 @@
           "url": "https://github.com/sponsors/RubenVerborgh"
         }
       ],
-      "peer": true,
       "engines": {
         "node": ">=4.0"
       },
@@ -6505,7 +6597,6 @@
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.4.tgz",
       "integrity": "sha512-KrGhL9Q4zjj0kiUt5OO4Mr/A/jlI2jDYs5eHBpYHPcBEVSiipAvn2Ko2HnPe20rmcuuvMHNdZFp+4IlGTMF0Ow==",
-      "peer": true,
       "dependencies": {
         "asynckit": "^0.4.0",
         "combined-stream": "^1.0.8",
@@ -8828,7 +8919,6 @@
       "version": "1.52.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
       "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -8837,7 +8927,6 @@
       "version": "2.1.35",
       "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
       "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
-      "peer": true,
       "dependencies": {
         "mime-db": "1.52.0"
       },
@@ -10229,8 +10318,7 @@
     "node_modules/proxy-from-env": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
-      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==",
-      "peer": true
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
     },
     "node_modules/psl": {
       "version": "1.15.0",
@@ -11074,8 +11162,7 @@
     "node_modules/stable-hash": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/stable-hash/-/stable-hash-0.0.5.tgz",
-      "integrity": "sha512-+L3ccpzibovGXFK+Ap/f8LOS0ahMrHTf3xu7mMLSpEGU0EO9ucaysSylKo9eRDFNhWve/y275iPmIZ4z39a9iA==",
-      "dev": true
+      "integrity": "sha512-+L3ccpzibovGXFK+Ap/f8LOS0ahMrHTf3xu7mMLSpEGU0EO9ucaysSylKo9eRDFNhWve/y275iPmIZ4z39a9iA=="
     },
     "node_modules/stop-iteration-iterator": {
       "version": "1.1.0",
@@ -11569,6 +11656,15 @@
         }
       }
     },
+    "node_modules/tempbox": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/tempbox/-/tempbox-1.1.1.tgz",
+      "integrity": "sha512-gQ4+9CSz3Rz5eQsSAfwl4kn+rgApaNaiwjELbhMzUycgXl+AXGn8lpq45DTaipADu1eJk5N90w0+OYWlCHQD5A==",
+      "license": "MIT",
+      "dependencies": {
+        "tinyqueue": "^3.0.0"
+      }
+    },
     "node_modules/thenify": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.1.tgz",
@@ -11588,6 +11684,12 @@
         "node": ">=0.8"
       }
     },
+    "node_modules/tiny-async-pool": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/tiny-async-pool/-/tiny-async-pool-2.1.0.tgz",
+      "integrity": "sha512-ltAHPh/9k0STRQqaoUX52NH4ZQYAJz24ZAEwf1Zm+HYg3l9OXTWeqWKyYsHu40wF/F0rxd2N2bk5sLvX2qlSvg==",
+      "license": "MIT"
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.15",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
@@ -11633,6 +11735,12 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
+    "node_modules/tinyqueue": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/tinyqueue/-/tinyqueue-3.0.0.tgz",
+      "integrity": "sha512-gRa9gwYU3ECmQYv3lslts5hxuIa90veaEcxDYuu3QGOIAEM2mOZkVHp48ANJuu1CURtRdHKUBY5Lm1tHV+sD4g==",
+      "license": "ISC"
+    },
     "node_modules/to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
diff --git a/authorization-for-rag/langchain-next-js/package.json b/authorization-for-rag/langchain-next-js/package.json
index 6a54f898..1a757baf 100644
--- a/authorization-for-rag/langchain-next-js/package.json
+++ b/authorization-for-rag/langchain-next-js/package.json
@@ -25,6 +25,8 @@
     "node": ">=18"
   },
   "dependencies": {
+    "@auth0/ai": "^6.0.0",
+    "@auth0/ai-langchain": "^5.0.0",
     "@auth0/nextjs-auth0": "4.12.1",
     "@langchain/community": "^0.3.55",
     "@langchain/core": "^0.3.78",
diff --git a/authorization-for-rag/langchain-python/poetry.toml b/authorization-for-rag/langchain-python/poetry.toml
new file mode 100644
index 00000000..e028e1ce
--- /dev/null
+++ b/authorization-for-rag/langchain-python/poetry.toml
@@ -0,0 +1,4 @@
+[repositories]
+[repositories.pypi]
+url = "https://pypi.org/simple/"
+default = true
diff --git a/authorization-for-rag/langgraph-python/poetry.toml b/authorization-for-rag/langgraph-python/poetry.toml
new file mode 100644
index 00000000..e028e1ce
--- /dev/null
+++ b/authorization-for-rag/langgraph-python/poetry.toml
@@ -0,0 +1,4 @@
+[repositories]
+[repositories.pypi]
+url = "https://pypi.org/simple/"
+default = true
diff --git a/authorization-for-rag/openai-fga-python/pip.conf b/authorization-for-rag/openai-fga-python/pip.conf
new file mode 100644
index 00000000..b0956c6a
--- /dev/null
+++ b/authorization-for-rag/openai-fga-python/pip.conf
@@ -0,0 +1,2 @@
+[global]
+index-url = https://pypi.org/simple
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/backend/uv.toml b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/backend/uv.toml
new file mode 100644
index 00000000..7b83065b
--- /dev/null
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/backend/uv.toml
@@ -0,0 +1 @@
+index-url = "https://pypi.org/simple/"
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/eslint.config.js b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/eslint.config.js
index d94e7deb..96d86130 100644
--- a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/eslint.config.js
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/eslint.config.js
@@ -1,23 +1,27 @@
-import js from '@eslint/js'
-import globals from 'globals'
-import reactHooks from 'eslint-plugin-react-hooks'
-import reactRefresh from 'eslint-plugin-react-refresh'
-import tseslint from 'typescript-eslint'
-import { globalIgnores } from 'eslint/config'
+import js from "@eslint/js";
+import globals from "globals";
+import reactHooks from "eslint-plugin-react-hooks";
+import reactRefresh from "eslint-plugin-react-refresh";
+import tseslint from "typescript-eslint";
+import { globalIgnores } from "eslint/config";
 
 export default tseslint.config([
-  globalIgnores(['dist']),
+  globalIgnores(["dist"]),
   {
-    files: ['**/*.{ts,tsx}'],
+    files: ["**/*.{ts,tsx}"],
     extends: [
       js.configs.recommended,
       tseslint.configs.recommended,
-      reactHooks.configs['recommended-latest'],
+      reactHooks.configs["recommended-latest"],
       reactRefresh.configs.vite,
     ],
     languageOptions: {
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      "@typescript-eslint/no-explicit-any": "warn",
+      "react-refresh/only-export-components": "warn",
+    },
   },
-])
+]);
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package-lock.json b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package-lock.json
index b744add1..a637abfa 100644
--- a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package-lock.json
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package-lock.json
@@ -41,6 +41,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/node": "^22.15.32",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -2584,6 +2585,16 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "22.19.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.2.tgz",
+      "integrity": "sha512-LPM2G3Syo1GLzXLGJAKdqoU35XvrWzGJ21/7sgZTUpbkBaOasTj8tjwn6w+hCkqaa1TfJ/w67rJSwYItlJ2mYw==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.2.2",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.2.tgz",
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package.json b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package.json
index 1040cf98..12bab694 100644
--- a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package.json
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/package.json
@@ -43,6 +43,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/node": "^22.15.32",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx
index b0e8ae68..d61138b6 100644
--- a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx
@@ -1,19 +1,18 @@
-import { useEffect, useState } from "react";
-import type { FormEvent, ReactNode } from "react";
-import { toast } from "sonner";
-import { StickToBottom, useStickToBottomContext } from "use-stick-to-bottom";
 import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
 import { useQueryState } from "nuqs";
-import { useStream } from "@langchain/langgraph-sdk/react";
-import { type Message } from "@langchain/langgraph-sdk";
+import { useState } from "react";
+import { toast } from "sonner";
+import { StickToBottom, useStickToBottomContext } from "use-stick-to-bottom";
 
 import { ChatMessageBubble } from "@/components/chat-message-bubble";
-import { Button } from "@/components/ui/button";
 import { TokenVaultInterruptHandler } from "@/components/TokenVaultInterruptHandler.tsx";
-import { cn } from "@/lib/utils";
+import { Button } from "@/components/ui/button";
 import { getConnectUrl } from "@/lib/use-auth";
-import { useLocation } from "react-router-dom";
+import { cn } from "@/lib/utils";
+import type { Message } from "@langchain/langgraph-sdk";
+import { useStream } from "@langchain/langgraph-sdk/react";
 
+import type { FormEvent, ReactNode } from "react";
 function ChatMessages(props: {
   messages: Message[];
   emptyStateComponent: ReactNode;
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/tsconfig.node.json b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/tsconfig.node.json
index f85a3990..9e3d9ab2 100644
--- a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/tsconfig.node.json
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/tsconfig.node.json
@@ -3,6 +3,7 @@
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
     "target": "ES2023",
     "lib": ["ES2023"],
+    "types": ["node"],
     "module": "ESNext",
     "skipLibCheck": true,
 
diff --git a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/vite.config.ts b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/vite.config.ts
index 375a2194..d3e87cff 100644
--- a/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/vite.config.ts
+++ b/call-apis-on-users-behalf/others-api/langchain-fastapi-py/frontend/vite.config.ts
@@ -1,24 +1,25 @@
-import path from "path";
+import { fileURLToPath } from "url";
 import { defineConfig, loadEnv } from "vite";
-import react from "@vitejs/plugin-react";
+
 import tailwindcss from "@tailwindcss/vite";
+import react from "@vitejs/plugin-react";
 
 // https://vite.dev/config/
 export default defineConfig(({ mode }) => {
-  const env = loadEnv(mode, process.cwd(), '')
+  const env = loadEnv(mode, process.cwd(), "");
   return {
     plugins: [react(), tailwindcss()],
-      server: {
-        proxy: {
-          "/api": {
-            target: env.API_HOST,
-          },
+    server: {
+      proxy: {
+        "/api": {
+          target: env.API_HOST,
         },
       },
-      resolve: {
-        alias: {
-          "@": path.resolve(__dirname, "./src"),
-        },
+    },
+    resolve: {
+      alias: {
+        "@": fileURLToPath(new URL("./src", import.meta.url)),
       },
+    },
   };
 });
diff --git a/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/agents/package.json b/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/agents/package.json
index 4c4cc51c..9664a59f 100644
--- a/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/agents/package.json
+++ b/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/agents/package.json
@@ -31,6 +31,7 @@
     "@eslint/eslintrc": "^3.3.1",
     "@eslint/js": "^9.36.0",
     "@jest/globals": "^30.2.0",
+    "@tsconfig/recommended": "^1.0.10",
     "@types/node": "^24",
     "@types/uuid": "^11.0.0",
     "@typescript-eslint/eslint-plugin": "^8.45.0",
diff --git a/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/web/package.json b/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/web/package.json
index 57246d03..50220ac3 100644
--- a/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/web/package.json
+++ b/call-apis-on-users-behalf/others-api/langchain-react-spa-js/apps/web/package.json
@@ -58,6 +58,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.37.0",
+    "@tsconfig/recommended": "^1.0.10",
     "@types/lodash": "^4.17.20",
     "@types/node": "^24.7.0",
     "@types/react": "^19.2.0",
diff --git a/call-apis-on-users-behalf/others-api/langchain-react-spa-js/package-lock.json b/call-apis-on-users-behalf/others-api/langchain-react-spa-js/package-lock.json
index 0b15b16e..2b26599b 100644
--- a/call-apis-on-users-behalf/others-api/langchain-react-spa-js/package-lock.json
+++ b/call-apis-on-users-behalf/others-api/langchain-react-spa-js/package-lock.json
@@ -52,6 +52,7 @@
         "@eslint/eslintrc": "^3.3.1",
         "@eslint/js": "^9.36.0",
         "@jest/globals": "^30.2.0",
+        "@tsconfig/recommended": "^1.0.10",
         "@types/node": "^24",
         "@types/uuid": "^11.0.0",
         "@typescript-eslint/eslint-plugin": "^8.45.0",
@@ -127,6 +128,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.37.0",
+        "@tsconfig/recommended": "^1.0.10",
         "@types/lodash": "^4.17.20",
         "@types/node": "^24.7.0",
         "@types/react": "^19.2.0",
diff --git a/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/main.py b/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/main.py
index 7c312ae0..0718c432 100644
--- a/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/main.py
+++ b/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/main.py
@@ -28,7 +28,7 @@
 async def read_index(request: Request, response: Response):
     try:
         await auth0_client.require_session(request, response)
-    except Exception as e:
+    except Exception:
         return RedirectResponse(url="/auth/login")
     
     return FileResponse("static/index.html")
diff --git a/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/pip.conf b/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/pip.conf
new file mode 100644
index 00000000..b0956c6a
--- /dev/null
+++ b/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/pip.conf
@@ -0,0 +1,2 @@
+[global]
+index-url = https://pypi.org/simple
diff --git a/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/requirements.txt b/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/requirements.txt
index fe1fc3bc..fee0b2d4 100644
--- a/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/requirements.txt
+++ b/call-apis-on-users-behalf/others-api/ms-agent-framework-vault-token-py/requirements.txt
@@ -3,6 +3,6 @@ uvicorn>=0.15.0
 pydantic>=2.0.0
 pydantic-settings>=2.0.0
 agent-framework
-auth0-fastapi>=0.3.0
+auth0-fastapi>=1.0.0b1
 starlette
 itsdangerous
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/backend/uv.toml b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/backend/uv.toml
new file mode 100644
index 00000000..7b83065b
--- /dev/null
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/backend/uv.toml
@@ -0,0 +1 @@
+index-url = "https://pypi.org/simple/"
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/eslint.config.js b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/eslint.config.js
index d94e7deb..96d86130 100644
--- a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/eslint.config.js
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/eslint.config.js
@@ -1,23 +1,27 @@
-import js from '@eslint/js'
-import globals from 'globals'
-import reactHooks from 'eslint-plugin-react-hooks'
-import reactRefresh from 'eslint-plugin-react-refresh'
-import tseslint from 'typescript-eslint'
-import { globalIgnores } from 'eslint/config'
+import js from "@eslint/js";
+import globals from "globals";
+import reactHooks from "eslint-plugin-react-hooks";
+import reactRefresh from "eslint-plugin-react-refresh";
+import tseslint from "typescript-eslint";
+import { globalIgnores } from "eslint/config";
 
 export default tseslint.config([
-  globalIgnores(['dist']),
+  globalIgnores(["dist"]),
   {
-    files: ['**/*.{ts,tsx}'],
+    files: ["**/*.{ts,tsx}"],
     extends: [
       js.configs.recommended,
       tseslint.configs.recommended,
-      reactHooks.configs['recommended-latest'],
+      reactHooks.configs["recommended-latest"],
       reactRefresh.configs.vite,
     ],
     languageOptions: {
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      "@typescript-eslint/no-explicit-any": "warn",
+      "react-refresh/only-export-components": "warn",
+    },
   },
-])
+]);
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package-lock.json b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package-lock.json
index d04b87de..9624533a 100644
--- a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package-lock.json
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package-lock.json
@@ -39,6 +39,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/node": "^22.15.32",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -2544,6 +2545,16 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "22.19.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.2.tgz",
+      "integrity": "sha512-LPM2G3Syo1GLzXLGJAKdqoU35XvrWzGJ21/7sgZTUpbkBaOasTj8tjwn6w+hCkqaa1TfJ/w67rJSwYItlJ2mYw==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.2.2",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.2.tgz",
@@ -6465,6 +6476,13 @@
         "node": "*"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "devOptional": true,
+      "license": "MIT"
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package.json b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package.json
index 13b2176b..ff69c19a 100644
--- a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package.json
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/package.json
@@ -41,6 +41,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/node": "^22.15.32",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx
index a3d32c27..15ca4e0d 100644
--- a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/src/components/chat-window.tsx
@@ -1,16 +1,16 @@
+import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
+import { useQueryState } from "nuqs";
 import { useState } from "react";
-import type { FormEvent, ReactNode } from "react";
 import { toast } from "sonner";
 import { StickToBottom, useStickToBottomContext } from "use-stick-to-bottom";
-import { ArrowDown, ArrowUpIcon, LoaderCircle } from "lucide-react";
-import { useQueryState } from "nuqs";
-import { useStream } from "@langchain/langgraph-sdk/react";
-import { type Message } from "@langchain/langgraph-sdk";
 
 import { ChatMessageBubble } from "@/components/chat-message-bubble";
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
+import { useStream } from "@langchain/langgraph-sdk/react";
 
+import type { Message } from "@langchain/langgraph-sdk";
+import type { FormEvent, ReactNode } from "react";
 function ChatMessages(props: {
   messages: Message[];
   emptyStateComponent: ReactNode;
@@ -19,7 +19,7 @@ function ChatMessages(props: {
 }) {
   return (
     <div className="flex flex-col max-w-[768px] mx-auto pb-12 w-full">
-      {props.messages.map((m, i) => {
+      {props.messages.map((m) => {
         return (
           <ChatMessageBubble key={m.id} message={m} aiEmoji={props.aiEmoji} />
         );
@@ -124,7 +124,7 @@ export function ChatWindow(props: {
   const [threadId, setThreadId] = useQueryState("threadId");
   const [input, setInput] = useState("");
 
-  const fetchWithCredentials = (url, options = {}) => {
+  const fetchWithCredentials = (url: string, options: RequestInit = {}) => {
     return fetch(url, {
       ...options,
       credentials: "include",
@@ -163,7 +163,7 @@ export function ChatWindow(props: {
             { type: "human", content: input, id: "temp" },
           ],
         }),
-      },
+      }
     );
     setInput("");
   }
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/tsconfig.node.json b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/tsconfig.node.json
index f85a3990..9e3d9ab2 100644
--- a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/tsconfig.node.json
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/tsconfig.node.json
@@ -3,6 +3,7 @@
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
     "target": "ES2023",
     "lib": ["ES2023"],
+    "types": ["node"],
     "module": "ESNext",
     "skipLibCheck": true,
 
diff --git a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/vite.config.ts b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/vite.config.ts
index aa58c10f..e344c895 100644
--- a/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/vite.config.ts
+++ b/call-apis-on-users-behalf/your-api/langchain-fastapi-py/frontend/vite.config.ts
@@ -1,14 +1,15 @@
-import path from "path";
+import { fileURLToPath } from "url";
 import { defineConfig } from "vite";
-import react from "@vitejs/plugin-react";
+
 import tailwindcss from "@tailwindcss/vite";
+import react from "@vitejs/plugin-react";
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
   resolve: {
     alias: {
-      "@": path.resolve(__dirname, "./src"),
+      "@": fileURLToPath(new URL("./src", import.meta.url)),
     },
   },
 });