diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 783144c..99b3dc3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,15 +28,16 @@ jobs:
           pip install -r requirements.txt
           pip install -r requirements-dev.txt
       
-      - name: Code formatting check (Black)
+      - name: Code style check (isort + Black, one order — no conflict)
         run: |
-          echo "🔍 Checking code formatting with Black..."
-          black --check . || (echo "❌ Code formatting issues found. Run 'black .' to fix." && exit 1)
-      
-      - name: Import sorting check (isort)
-        run: |
-          echo "🔍 Checking import sorting with isort..."
-          isort --check-only . || (echo "❌ Import sorting issues found. Run 'isort .' to fix." && exit 1)
+          echo "🔍 Applying isort then black (pyproject.toml: isort profile=black)..."
+          isort .
+          black .
+          echo "🔍 Checking that repo is already formatted (no diff after isort+black)..."
+          git diff --exit-code || (
+            echo "❌ Code style drift. Locally run: isort . && black . && git add -A && git commit -m 'style: isort + black'"
+            exit 1
+          )
       
       - name: Linting (flake8) - Critical errors
         run: |