Install override sdk in integ tests

Author: Astraea Quinn S

.github/workflows/ci.yml

@@ -48,14 +48,58 @@ jobs:
         ssh-private-key: ${{ secrets.SDK_KEY }}
     - name: Check for Python Language SDK branch override in PR
       if: github.event_name == 'pull_request'
+      env:
+        GITHUB_EVENT_PATH: ${{ github.event_path }}
       run: |
-        OVERRIDE=$(echo "${{ github.event.pull_request.body }}" | grep -o 'PYTHON_LANGUAGE_SDK_BRANCH: [^[:space:]]*' | cut -d' ' -f2 || true)
-        if [ ! -z "$OVERRIDE" ]; then
+        # Robust extraction: check PR title and body and accept ":" or "=" with optional spaces.
+        OVERRIDE=$(
+          python - <<'PY'
+import json, os, re
+ev_path = os.environ.get("GITHUB_EVENT_PATH")
+if not ev_path:
+    raise SystemExit(0)
+with open(ev_path, "r") as f:
+    ev = json.load(f)
+pr = ev.get("pull_request", {}) or {}
+text = "\n".join([pr.get("title","") or "", pr.get("body","") or ""])
+m = re.search(r'PYTHON_LANGUAGE_SDK_BRANCH\s*[:=]\s*([^\s]+)', text, re.IGNORECASE)
+if m:
+    print(m.group(1))
+PY
+        )
+        if [ -n "$OVERRIDE" ]; then
           echo "AWS_DURABLE_SDK_URL=git+ssh://git@github.com/aws/aws-durable-execution-sdk-python.git@$OVERRIDE" >> $GITHUB_ENV
           echo "Using Python Language SDK branch override: $OVERRIDE"
         else
           echo "Using default Python Language SDK (main branch)"
         fi
+
+    - name: Install Python Language SDK override into hatch environment (if provided)
+      if: env.AWS_DURABLE_SDK_URL != ''
+      run: |
+        echo "Detected AWS_DURABLE_SDK_URL=$AWS_DURABLE_SDK_URL"
+        python -m pip install --upgrade pip
+        # Prefer installing inside hatch environment so hatch run test:examples picks it up.
+        # Install (force reinstall) the branch into hatch's environment. If hatch env doesn't exist
+        # or hatch run fails, fall back to system pip install.
+        set -e
+        if hatch run true 2>/dev/null; then
+          echo "Installing SDK override inside hatch environment..."
+          hatch run pip install --upgrade --force-reinstall "$AWS_DURABLE_SDK_URL"
+        else
+          echo "hatch run not available or failed; falling back to system pip install..."
+          python -m pip install --upgrade --force-reinstall "$AWS_DURABLE_SDK_URL"
+        fi
+        # Sanity check: show where the installed package comes from
+        python - <<'PY'
+import importlib, sys
+try:
+    m = importlib.import_module("aws_durable_execution_sdk_python")
+    print("aws_durable_execution_sdk_python.__file__:", getattr(m, "__file__", "<no __file__>"))
+except Exception as e:
+    print("Failed to import aws_durable_execution_sdk_python:", e)
+PY
+
     - name: static analysis
       run: hatch fmt --check
     - name: type checking