feat(mcp): Validate C++ tools against real-world gencpp components and improve enum support

tests/repro_bug.py

@@ -0,0 +1,31 @@
+import sys
+import os
+sys.path.insert(0, os.getcwd())
+
+from src.file_cache import ASTParser
+
+def test_multibyte_definition_lookup():
+ # String with a multi-byte character (3 bytes)
+ # The shade character ▓ is 3 bytes in UTF-8.
+ # 3 shade characters = 9 bytes. In Python str they are 3 chars.
+ # Offset drift will be 6 bytes.
+ code = """
+/* ▓▓▓ */
+struct Target {
+ int x;
+};
+"""
+ parser = ASTParser("cpp")
+ # This should find Target and return its definition
+ definition = parser.get_definition(code, "Target")
+ print(f"Definition found: '{definition}'")
+ if "struct Target" not in definition:
+  print("FAILURE: 'struct Target' not in definition")
+  sys.exit(1)
+ if "int x;" not in definition:
+  print("FAILURE: 'int x;' not in definition")
+  sys.exit(1)
+ print("SUCCESS")
+
+if __name__ == "__main__":
+ test_multibyte_definition_lookup()