Support toolCall XML tags and XML child arguments in DetectToolCalls

gr2gw_test.go

@@ -670,6 +670,22 @@ Some postamble.`
   if rem4 != "" {
     t.Errorf("expected empty remaining, got %q", rem4)
   }
+
+  // 5. XML toolCall with child tags
+  xmlChildTags := "```xml\n<toolCall>\n  <name>get_weather</name>\n  <arguments>\n    <loc>Paris</loc>\n  </arguments>\n</toolCall>\n```"
+  calls5, rem5, ok5 := DetectToolCalls(xmlChildTags)
+  if !ok5 || len(calls5) != 1 {
+    t.Fatalf("expected 1 call from xmlChildTags, got %d", len(calls5))
+  }
+  if calls5[0].Function.Name != "get_weather" {
+    t.Errorf("expected get_weather, got %q", calls5[0].Function.Name)
+  }
+  if !strings.Contains(calls5[0].Function.Arguments, `"Paris"`) {
+    t.Errorf("expected Paris in arguments, got %s", calls5[0].Function.Arguments)
+  }
+  if rem5 != "" {
+    t.Errorf("expected empty remaining, got %q", rem5)
+  }
 }
 
 func TestUniversalStreamToolCallFilterVariants(t *testing.T) {