C API Stability

https://docs.python.org/3.11/c-api/stable.html

CPython’s Application Binary Interface (ABI) is forward- and backwards-compatible across a minor release (if these are compiled the same way; see Platform Considerations below). So, code compiled for Python 3.10.0 will work on 3.10.8 and vice versa, but will need to be compiled separately for 3.9.x and 3.10.x

Stable Application Binary Interface

Python provides a Stable ABI: a set of symbols that will remain compatible across Python 3.x versions

Define Py_LIMITED_API to the value of PY_VERSION_HEX corresponding to the lowest Python version your extension supports