## Summary We currently perform a subtyping check, similar to what we were doing for `@final` instances before https://github.com/astral-sh/ruff/pull/21167, which is incorrect, e.g. we currently consider `type[X[Any]]` and `type[X[T]]]` disjoint (where `X` is `@final`).
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/ty_test/README.md for documentation of this test format.