diff --git a/.claude/scripts/sync.sh b/.claude/scripts/sync.sh
index 4bb655f..6b45792 100755
--- a/.claude/scripts/sync.sh
+++ b/.claude/scripts/sync.sh
@@ -37,12 +37,22 @@ 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
+    echo -e "${RED}[ERROR]${NC} No Python interpreter found (need python or python3)"
+    exit 1
+fi
+
 # Load user identity
 USER_DISPLAY="unknown"
 USER_GITEA=""
 if [ -f ".claude/identity.json" ]; then
-    USER_DISPLAY=$(python -c "import json,sys; d=json.load(open('.claude/identity.json')); print(d.get('full_name', d.get('user','unknown')))" 2>/dev/null || echo "unknown")
-    USER_GITEA=$(python -c "import json,sys; d=json.load(open('.claude/identity.json')); print(d.get('user',''))" 2>/dev/null || echo "")
+    USER_DISPLAY=$($PYTHON -c "import json,sys; d=json.load(open('.claude/identity.json')); print(d.get('full_name', d.get('user','unknown')))" 2>/dev/null || echo "unknown")
+    USER_GITEA=$($PYTHON -c "import json,sys; d=json.load(open('.claude/identity.json')); print(d.get('user',''))" 2>/dev/null || echo "")
 fi
 echo -e "${GREEN}[OK]${NC} Syncing as: $USER_DISPLAY (machine: $MACHINE)"