diff --git a/.github/workflows/backup.yml b/.github/workflows/backup.yml
index 0891ea8..48dd148 100644
--- a/.github/workflows/backup.yml
+++ b/.github/workflows/backup.yml
@@ -13,7 +13,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index e1db5ac..68acd5c 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -9,7 +9,7 @@ jobs:
   benchmark:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # ADDED: Install uv binary
       - name: Install uv
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 611f85d..72e805b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
   python-coverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install uv
         uses: astral-sh/setup-uv@v5
       - name: Run Python Coverage
@@ -28,7 +28,7 @@ jobs:
   rust-coverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       
       - name: Install System Dependencies
         run: |
@@ -59,7 +59,7 @@ jobs:
   typescript-coverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
@@ -79,7 +79,7 @@ jobs:
     name: Python CI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space
         run: |
@@ -113,7 +113,7 @@ jobs:
     name: Rust CI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
@@ -145,7 +145,7 @@ jobs:
       run:
         working-directory: ./typescript
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node
         uses: actions/setup-node@v6
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index bba4bde..9efeccd 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -30,7 +30,7 @@ jobs:
       packages: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # CRITICAL: Convert repository name to lowercase to satisfy Docker requirements
       - name: Prepare Image Name
@@ -73,7 +73,7 @@ jobs:
     environment: production
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up Kubeconfig
         run: |
           mkdir -p ~/.kube
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index af1b14d..1156023 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # --- TypeScript Docs ---
       - name: Setup Node.js