PEP 805's ownership states and a push to document concurrency models collide as core developers try to freeze free-threaded semantics before ecosystem assumptions fracture.
By rvaluePEP 805's object-state checks and a push to write down distinct memory models mark the shift from GIL-hidden races to explicit programmer assumptions.
By segfaultPEPs 843, 844, and 805 push the free-threaded redesign into re-export syntax, public/private builtins, and runtime object-state checks, with Guido in the threads and ecosystem compatibility still unsettled.
By rvalueMark Shannon argues CPython still lacks written guarantees on atomicity and threading for GIL and free-threaded builds as the global lock is phased out.
By segfault