PYRS
Python 3.14 interpreter in Rust with CPython semantic compatibility
Visit blueblazin.github.io ↗What is PYRS?
PYRS is a production-focused Python interpreter written in Rust that targets CPython 3.14 compatibility. It provides a native runtime for macOS and Linux, along with a limited WASM version accessible online. The interpreter prioritizes semantic parity with CPython, including grammar behavior, bytecode execution, and runtime contracts, while also supporting C-API closure for scientific stack compatibility.
The project was built entirely by an AI coding agent (Codex) over 30 days, resulting in 342k lines of code. It includes a REPL, differential behavior gates for testing, and release discipline practices like parity profiles and integrity audits to ensure production-grade runtime behavior.
Momentum
Daily activity over the last 30 days: upvotes, unique visits, new GitHub stars and Hacker News points.
How do we know it's vibe coded?
vibetrend discovered PYRS automatically. Evidence: HN post: "Python interpreter written in Rust entirely by a single coding agent (Codex) in 30 days". View source.
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