Bazel is a popular cross-platform cross-language build system. E.g., at Google it is commonly and publicly known that essentially every [sub]repo in its monorepo has BUILD files for Bazel integration.

ty could easily become the replacement for pytype now that that's deprecated.

To that end, the recommendation is for the creation and maintenance of rules_ty.

FWIW: There is https://github.com/aspect-build/rules_py but it seems to have some weirdness associated requiring a login to their SaaS.

References:

• https://github.com/bazel-contrib/rules_python
• https://github.com/bazel-contrib/rules_mypy
• Strict rules that check dependencies and type annotations bazel-contrib/rules_python#296 (call for action now that pytype—Google's oft used solution—is deprecated)