diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..5bd8cff
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,50 @@
+# SPDX-FileCopyrightText: 2025 RAprogramm <andrey.rozanov.vl@gmail.com>
+# SPDX-License-Identifier: MIT
+
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: '0 0 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: write
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [rust]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          queries: security-extended
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Setup Rust cache
+        uses: Swatinem/rust-cache@v2
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{ matrix.language }}"
diff --git a/examples/command_line.rs b/examples/command_line.rs
index 3676288..15bf4a5 100644
--- a/examples/command_line.rs
+++ b/examples/command_line.rs
@@ -9,7 +9,7 @@
 //! - Simulating a C function that takes char** argv
 //! - Real-world usage pattern
 
-use std::ffi::{c_char, c_int, CStr};
+use std::ffi::{CStr, c_char, c_int};
 
 use cstring_array::CStringArray;
 
@@ -57,7 +57,7 @@ fn main() {
             s if s.starts_with("--") => println!("  Option: {}", s),
             s if s.starts_with('-') => println!("  Flag: {}", s),
             s if i == 0 => println!("  Program: {}", s),
-            s => println!("  Argument: {}", s),
+            s => println!("  Argument: {}", s)
         }
     }
 }
diff --git a/examples/zero_copy.rs b/examples/zero_copy.rs
index eab057c..e751552 100644
--- a/examples/zero_copy.rs
+++ b/examples/zero_copy.rs
@@ -54,7 +54,10 @@ fn main() {
     println!("  Created {} CStrings", large_cstrings.len());
     let large_array = CStringArray::from_cstrings(large_cstrings).expect("Failed to create array");
     println!("  Zero-copy array length: {}", large_array.len());
-    println!("  First element: {}", large_array.get(0).unwrap().to_str().unwrap());
+    println!(
+        "  First element: {}",
+        large_array.get(0).unwrap().to_str().unwrap()
+    );
     println!(
         "  Last element: {}",
         large_array