diff --git a/setup-claude-code.sh b/setup-claude-code.sh
index 019633e..c21914f 100644
--- a/setup-claude-code.sh
+++ b/setup-claude-code.sh
@@ -83,10 +83,10 @@ test_api_connection() {
         "https://newapi.sususu.cf"
     )
 
-    print_info "Testing API connections..."
+    print_info "Testing API connections..." >&2
 
     for base_url in "${test_urls[@]}"; do
-        print_info "Testing $base_url..."
+        print_info "Testing $base_url..." >&2
 
         local test_endpoint="$base_url/v1/models"
 
@@ -102,25 +102,25 @@ test_api_connection() {
             local model_count
             model_count=$(cat /tmp/claude_test_response | jq -r '.data | length' 2>/dev/null || echo "0")
             if [ "$model_count" -gt "0" ]; then
-                print_success "API connection successful! Found $model_count models at $base_url"
+                print_success "API connection successful! Found $model_count models at $base_url" >&2
                 rm -f /tmp/claude_test_response
                 echo "$base_url"
                 return 0
             else
-                print_warning "API responded but no models found at $base_url"
+                print_warning "API responded but no models found at $base_url" >&2
             fi
         elif [ "$response" = "401" ]; then
-            print_warning "API key authentication failed for $base_url"
+            print_warning "API key authentication failed for $base_url" >&2
         elif [ "$response" = "000" ]; then
-            print_warning "Cannot connect to $base_url"
+            print_warning "Cannot connect to $base_url" >&2
         else
-            print_warning "API test failed for $base_url with HTTP status: $response"
+            print_warning "API test failed for $base_url with HTTP status: $response" >&2
         fi
 
         rm -f /tmp/claude_test_response
     done
 
-    print_error "All API connections failed. Please check your API key and internet connection."
+    print_error "All API connections failed. Please check your API key and internet connection." >&2
     return 1
 }
 
@@ -129,20 +129,21 @@ create_settings() {
     local base_url="$1"
     local api_key="$2"
     
+    # Create JSON using jq to ensure proper escaping
     local settings_json
-    settings_json=$(cat <<EOF
-{
-  "env": {
-    "ANTHROPIC_BASE_URL": "$base_url",
-    "ANTHROPIC_AUTH_TOKEN": "$api_key",
-    "DISABLE_TELEMETRY": 1,
-    "DISABLE_ERROR_REPORTING": 1,
-    "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": 1,
-  },
-  "model": "sonnet"
-}
-EOF
-    )
+    settings_json=$(jq -n \
+        --arg base_url "$base_url" \
+        --arg api_key "$api_key" \
+        '{
+            "env": {
+                "ANTHROPIC_BASE_URL": $base_url,
+                "ANTHROPIC_AUTH_TOKEN": $api_key,
+                "DISABLE_TELEMETRY": 1,
+                "DISABLE_ERROR_REPORTING": 1,
+                "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": 1
+            },
+            "model": "sonnet"
+        }')
     
     # Validate JSON
     if ! echo "$settings_json" | jq . > /dev/null 2>&1; then