fix(lint): resolve LIT015 model bases per class node

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

scripts/check_type_discipline.py

@@ -865,14 +865,14 @@ def iter_typeddict_violations(path: Path, tree: ast.AST) -> Iterator[Violation]:
 
 def _pydantic_classes(tree: ast.AST) -> tuple[ast.ClassDef, ...]:
     classes: Final = tuple(node for node in ast.walk(tree) if isinstance(node, ast.ClassDef))
-    bases_of: Final = {cls.name: _base_names(cls) for cls in classes}
 
     def expand(known: frozenset[str]) -> frozenset[str]:
-        grown: Final = known | frozenset(name for name, bases in bases_of.items() if bases & known)
+        grown: Final = known | frozenset(cls.name for cls in classes if _base_names(cls) & known)
         return grown if grown == known else expand(grown)
 
-    names: Final = expand(PYDANTIC_BASES) - expand(frozenset((TYPEDDICT_BASE,)))
-    return tuple(cls for cls in classes if cls.name in names)
+    model_names: Final = expand(PYDANTIC_BASES)
+    typeddict_names: Final = expand(frozenset((TYPEDDICT_BASE,)))
+    return tuple(cls for cls in classes if _base_names(cls) & model_names and not _base_names(cls) & typeddict_names)
 
 
 def _bool_constant(value: ast.expr) -> bool | None:

tests/unit/test_check_type_discipline.py

@@ -13,6 +13,7 @@ import re
 import subprocess
 import sys
 from pathlib import Path
+from typing import Final
 
 import pytest
 
@@ -770,6 +771,21 @@ def test_same_named_models_use_each_classes_own_override(tmp_path):
     assert _codes(tmp_path, src) == ["LIT015"]
 
 
+def test_pydantic_model_discovery_uses_each_class_nodes_bases(tmp_path):
+    src: Final = (
+        "from pydantic import BaseModel\n"
+        "class Config(BaseModel):\n"
+        "    x: int\n"
+        "class Consumer(BaseModel, frozen=True):\n"
+        "    class Config:\n"
+        "        arbitrary_types_allowed = True\n"
+    )
+    path: Final = tmp_path / "snippet.py"
+    path.write_text(src, encoding="utf-8")
+    violations: Final = checker.check_file(path)
+    assert [(violation.line, violation.code) for violation in violations] == [(2, "LIT015")]
+
+
 # --------------------------------------------------------------------------- #
 # Stacked comprehension clauses (LIT014)
 # --------------------------------------------------------------------------- #