This means that the main branch of CPython should never be broken more than 24 hours for WASI and that a release will be blocked if WASI support is broken. Lastly, 3.13/ main and 3.12 now support WASI SDK 21 – which is the official name of the project – and 3.11 is one bug fix away in the test suite from also having support. That means CPython 3.13 does not officially support Emscripten and probably starting in 3.14, I will be removing any code that complicates supporting WASI.