chore: Checkpoint commit of unstaged changes, including new tests and debug scripts

debug_ast.py

@@ -0,0 +1,18 @@
+import tree_sitter
+import tree_sitter_python
+
+code = """def hot_func():
+    # [HOT]
+    print(1)"""
+
+PY_LANGUAGE = tree_sitter.Language(tree_sitter_python.language())
+parser = tree_sitter.Parser(PY_LANGUAGE)
+tree = parser.parse(bytes(code, "utf8"))
+
+def walk(node, indent=0):
+    content = code[node.start_byte:node.end_byte].strip()
+    print(f"{'  ' * indent}{node.type} ({node.start_byte}-{node.end_byte}): {content[:20]}")
+    for child in node.children:
+        walk(child, indent + 1)
+
+walk(tree.root_node)