Codex builds serc Rust CPython bytecode compiler

I had Codex build a CPython bytecode compiler in Rust (`serc`). It emits byte-for-byte identical output on the top 10,000 PyPI packages, 2-4x faster than the CPython implementation. This was entirely an experiment, though we may ship it (opt-in) in uv. https://t.co/EgpX4RqWKJ Open article →