diff --git a/.claude/scripts/sync.sh b/.claude/scripts/sync.sh
index 6b45792..993617e 100755
--- a/.claude/scripts/sync.sh
+++ b/.claude/scripts/sync.sh
@@ -37,12 +37,17 @@ fi
 
 echo -e "${GREEN}[OK]${NC} Working directory: $(pwd)"
 
-# Detect Python interpreter (python3 on Mac/Linux, python on Windows)
-if command -v python3 >/dev/null 2>&1; then
-    PYTHON=python3
-elif command -v python >/dev/null 2>&1; then
-    PYTHON=python
-else
+# Detect Python interpreter — verify it actually runs (Windows Store stub passes command -v but fails to execute)
+PYTHON=""
+for candidate in python3 python; do
+    if command -v "$candidate" >/dev/null 2>&1; then
+        if "$candidate" -c "import sys; sys.exit(0)" >/dev/null 2>&1; then
+            PYTHON="$candidate"
+            break
+        fi
+    fi
+done
+if [ -z "$PYTHON" ]; then
     echo -e "${RED}[ERROR]${NC} No Python interpreter found (need python or python3)"
     exit 1
 fi