diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index cccec5c5..c3f6d3ed 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -38,6 +38,22 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: "Guard: reject PRs with zero file changes"
+        run: |
+          CHANGED=$(git diff --name-only origin/main...HEAD | wc -l | tr -d ' ')
+          echo "Changed files: $CHANGED"
+          if [ "$CHANGED" -eq 0 ]; then
+            echo ""
+            echo "═══════════════════════════════════════════════════"
+            echo "  BLOCKED: PR contains zero file changes."
+            echo "  This indicates rubber-stamping — approving without"
+            echo "  actually making any modifications."
+            echo "  Make real changes before requesting review."
+            echo "═══════════════════════════════════════════════════"
+            exit 1
+          fi
+          echo "✓ PR has $CHANGED changed file(s)."
+
       - name: Validate Python syntax
         run: |
           FAIL=0