diff --git a/bin/amc b/bin/amc
index 8d7f36a..bac124b 100755
--- a/bin/amc
+++ b/bin/amc
@@ -34,7 +34,12 @@ case "$cmd" in
         echo "AMC started (pid $!)"
       fi
     fi
-    open "http://127.0.0.1:$PORT"
+    # Open browser (platform-specific)
+    if command -v open &>/dev/null; then
+      open "http://127.0.0.1:$PORT"
+    elif command -v xdg-open &>/dev/null; then
+      xdg-open "http://127.0.0.1:$PORT"
+    fi
     ;;
   stop)
     if is_running; then
diff --git a/bin/amc-hook b/bin/amc-hook
index df7545e..4405b24 100755
--- a/bin/amc-hook
+++ b/bin/amc-hook
@@ -73,7 +73,7 @@ def _extract_questions(hook):
     if not isinstance(tool_input, dict):
         return []
 
-    questions = tool_input.get("questions", [])
+    questions = tool_input.get("questions") or []
     result = []
     for q in questions:
         entry = {