diff --git a/express/biome.jsonc b/express/biome.jsonc
new file mode 100644
index 0000000..2c997ab
--- /dev/null
+++ b/express/biome.jsonc
@@ -0,0 +1,36 @@
+{
+    "$schema": "https://biomejs.dev/schemas/2.3.10/schema.json",
+    "vcs": {
+        "enabled": true,
+        "clientKind": "git",
+        "useIgnoreFile": true
+    },
+    "files": {
+        "includes": ["**", "!!**/dist"]
+    },
+    "formatter": {
+        "enabled": true,
+        "indentStyle": "space",
+        "indentWidth": 4
+    },
+
+    "linter": {
+        "enabled": true,
+        "rules": {
+            "recommended": true
+        }
+    },
+    "javascript": {
+        "formatter": {
+            "quoteStyle": "double"
+        }
+    },
+    "assist": {
+        "enabled": true,
+        "actions": {
+            "source": {
+                "organizeImports": "on"
+            }
+        }
+    }
+}
diff --git a/express/package.json b/express/package.json
index 2fc863d..4a957c2 100644
--- a/express/package.json
+++ b/express/package.json
@@ -43,6 +43,7 @@
         ]
     },
     "devDependencies": {
+        "@biomejs/biome": "2.3.10",
         "@types/express": "^5.0.5"
     }
 }
diff --git a/express/pnpm-lock.yaml b/express/pnpm-lock.yaml
index 431cf7e..240c29f 100644
--- a/express/pnpm-lock.yaml
+++ b/express/pnpm-lock.yaml
@@ -45,6 +45,9 @@ importers:
         specifier: ^4.1.12
         version: 4.1.12
     devDependencies:
+      '@biomejs/biome':
+        specifier: 2.3.10
+        version: 2.3.10
       '@types/express':
         specifier: ^5.0.5
         version: 5.0.5
@@ -88,6 +91,59 @@ packages:
     resolution: {integrity: sha512-qQ5m48eI/MFLQ5PxQj4PFaprjyCTLI37ElWMmNs0K8Lk3dVeOdNpB3ks8jc7yM5CDmVC73eMVk/trk3fgmrUpA==}
     engines: {node: '>=6.9.0'}
 
+  '@biomejs/biome@2.3.10':
+    resolution: {integrity: sha512-/uWSUd1MHX2fjqNLHNL6zLYWBbrJeG412/8H7ESuK8ewoRoMPUgHDebqKrPTx/5n6f17Xzqc9hdg3MEqA5hXnQ==}
+    engines: {node: '>=14.21.3'}
+    hasBin: true
+
+  '@biomejs/cli-darwin-arm64@2.3.10':
+    resolution: {integrity: sha512-M6xUjtCVnNGFfK7HMNKa593nb7fwNm43fq1Mt71kpLpb+4mE7odO8W/oWVDyBVO4ackhresy1ZYO7OJcVo/B7w==}
+    engines: {node: '>=14.21.3'}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@biomejs/cli-darwin-x64@2.3.10':
+    resolution: {integrity: sha512-Vae7+V6t/Avr8tVbFNjnFSTKZogZHFYl7MMH62P/J1kZtr0tyRQ9Fe0onjqjS2Ek9lmNLmZc/VR5uSekh+p1fg==}
+    engines: {node: '>=14.21.3'}
+    cpu: [x64]
+    os: [darwin]
+
+  '@biomejs/cli-linux-arm64-musl@2.3.10':
+    resolution: {integrity: sha512-B9DszIHkuKtOH2IFeeVkQmSMVUjss9KtHaNXquYYWCjH8IstNgXgx5B0aSBQNr6mn4RcKKRQZXn9Zu1rM3O0/A==}
+    engines: {node: '>=14.21.3'}
+    cpu: [arm64]
+    os: [linux]
+
+  '@biomejs/cli-linux-arm64@2.3.10':
+    resolution: {integrity: sha512-hhPw2V3/EpHKsileVOFynuWiKRgFEV48cLe0eA+G2wO4SzlwEhLEB9LhlSrVeu2mtSn205W283LkX7Fh48CaxA==}
+    engines: {node: '>=14.21.3'}
+    cpu: [arm64]
+    os: [linux]
+
+  '@biomejs/cli-linux-x64-musl@2.3.10':
+    resolution: {integrity: sha512-QTfHZQh62SDFdYc2nfmZFuTm5yYb4eO1zwfB+90YxUumRCR171tS1GoTX5OD0wrv4UsziMPmrePMtkTnNyYG3g==}
+    engines: {node: '>=14.21.3'}
+    cpu: [x64]
+    os: [linux]
+
+  '@biomejs/cli-linux-x64@2.3.10':
+    resolution: {integrity: sha512-wwAkWD1MR95u+J4LkWP74/vGz+tRrIQvr8kfMMJY8KOQ8+HMVleREOcPYsQX82S7uueco60L58Wc6M1I9WA9Dw==}
+    engines: {node: '>=14.21.3'}
+    cpu: [x64]
+    os: [linux]
+
+  '@biomejs/cli-win32-arm64@2.3.10':
+    resolution: {integrity: sha512-o7lYc9n+CfRbHvkjPhm8s9FgbKdYZu5HCcGVMItLjz93EhgJ8AM44W+QckDqLA9MKDNFrR8nPbO4b73VC5kGGQ==}
+    engines: {node: '>=14.21.3'}
+    cpu: [arm64]
+    os: [win32]
+
+  '@biomejs/cli-win32-x64@2.3.10':
+    resolution: {integrity: sha512-pHEFgq7dUEsKnqG9mx9bXihxGI49X+ar+UBrEIj3Wqj3UCZp1rNgV+OoyjFgcXsjCWpuEAF4VJdkZr3TrWdCbQ==}
+    engines: {node: '>=14.21.3'}
+    cpu: [x64]
+    os: [win32]
+
   '@cspotcode/source-map-support@0.8.1':
     resolution: {integrity: sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==}
     engines: {node: '>=12'}
@@ -862,6 +918,41 @@ snapshots:
       '@babel/helper-string-parser': 7.27.1
       '@babel/helper-validator-identifier': 7.28.5
 
+  '@biomejs/biome@2.3.10':
+    optionalDependencies:
+      '@biomejs/cli-darwin-arm64': 2.3.10
+      '@biomejs/cli-darwin-x64': 2.3.10
+      '@biomejs/cli-linux-arm64': 2.3.10
+      '@biomejs/cli-linux-arm64-musl': 2.3.10
+      '@biomejs/cli-linux-x64': 2.3.10
+      '@biomejs/cli-linux-x64-musl': 2.3.10
+      '@biomejs/cli-win32-arm64': 2.3.10
+      '@biomejs/cli-win32-x64': 2.3.10
+
+  '@biomejs/cli-darwin-arm64@2.3.10':
+    optional: true
+
+  '@biomejs/cli-darwin-x64@2.3.10':
+    optional: true
+
+  '@biomejs/cli-linux-arm64-musl@2.3.10':
+    optional: true
+
+  '@biomejs/cli-linux-arm64@2.3.10':
+    optional: true
+
+  '@biomejs/cli-linux-x64-musl@2.3.10':
+    optional: true
+
+  '@biomejs/cli-linux-x64@2.3.10':
+    optional: true
+
+  '@biomejs/cli-win32-arm64@2.3.10':
+    optional: true
+
+  '@biomejs/cli-win32-x64@2.3.10':
+    optional: true
+
   '@cspotcode/source-map-support@0.8.1':
     dependencies:
       '@jridgewell/trace-mapping': 0.3.9