Some of that is already around, but scattered across multiple locations. For example there is a list in the Python doc: https://docs.python.org/3/howto/free-t

Some of that is already around, but scattered across multiple locations. For example there is a list in the Python doc: https://docs.python.org/3/howto/free-threading-extensions.html#borrowed-references https://docs.python.org/3/howto/free-threading-extensions.ht... And a dedicated web site: https://py-free-threading.github.io/ https://py-free-threading.github.io/ But as an example neither include PySequence_Fast which is in the json.c changes I pointed to. The folks doing the auditing of stdlib do have an idea of what they are looking for, and so would be best suited to keep a list (and tool) up to date with what is needed.