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Simon Willison updates pwasm WebAssembly engine with AI assistance

By PulseAugur Editorial · [2 sources] ·

Simon Willison has released version 0.2a0 of pwasm, a Python-based WebAssembly engine he initially developed in January. He utilized Claude Opus 5.5 to enhance the project, resulting in 42 commits that significantly expanded its capabilities. The updated version now supports nearly the entire WebAssembly specification and includes bundled builds of MicroPython, QuickJS, and Micro QuickJS, though Willison cautions against trusting it due to its experimental nature. AI

IMPACT Demonstrates AI's capability to significantly enhance existing codebases and accelerate development cycles for niche projects.

RANK_REASON Update to an open-source project using an AI model for improvements.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Simon Willison updates pwasm WebAssembly engine with AI assistance

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Update to an open-source project using an AI model for improvements.
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2 independent sources
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product, model release
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COVERAGE [2]

  1. Simon Willison TIER_1 English(EN) ·

    pwasm 0.2a0

    <p><strong>Release:</strong> <a href="https://github.com/simonw/pwasm/releases/tag/0.2a0">pwasm 0.2a0</a></p> <p>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 <a href="https://simonwilliso…

  2. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    pwasm 0.2a0 https://simonwillison.net/2026/Oct/1/pwasm/ # AI # OpenSource # Python

    pwasm 0.2a0 https://simonwillison.net/2026/Oct/1/pwasm/ # AI # OpenSource # Python

    LINKS simonwillison.net/…/pwasm

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