Simon Willison 发布纯 Python WebAssembly 引擎 pwasm 0.2a0
Release: pwasm 0.2a0
Simon Willison 发布 pwasm 0.2a0，这是他用 Claude Opus 5.5 在 42 次提交后大幅改进的纯 Python WebAssembly 引擎，现已支持几乎全部 WASM 规范。PyPI 上的 wheel 还打包了 MicroPython、QuickJS 和 Micro QuickJS 的可用 WASM 构建，但因仍属 alpha 版本，作者表示完全不可信任。
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1st October 2026
pwasm is one of my folly projects - an entirely vibe-coded pure Python WebAssembly engine that I built in January during my first bout of AI mania.
I hadn't touched it since January, so I decided to let Claude Opus 5.5 loose on it and see if it could make any significant improvements:
Evaluate current state of pwasm - then consider what it would take to get the MicroPython and micro JavaScript experiments from the research repo working under it - and what it would take to speed it up
42 commits later (with minimal follow-up prompting) it now handles almost all of the WASM specification and the wheel from PyPI bundles working WASM builds of MicroPython, QuickJS and Micro QuickJS.
I wouldn't trust this thing at all - hence the alpha version tag - but it's interesting seeing how today's models can improve on the work of models from 10 months ago.
Recent articles
We're going to need default hard budget caps on pretty much everything - 3rd October 2026; OpenAI DevDay 2026 live blog - 29th September 2026; 2026 in LLMs (so far) - 27th September 2026
This is a beat by Simon Willison, posted on 1st October 2026.
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