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Lasm compiles Lean 4 to WebAssembly for verified web apps

Lasm is a new tool that allows developers to write formally verified web applications using the Lean 4 programming language and compile them to WebAssembly. This enables code to be deployed across various JavaScript environments, including Node.js, serverless functions, and edge computing platforms. The project emphasizes its ability to prove properties of the deployed code, with a flagship example demonstrating 117 verified theorems for a RealWorld application. AI

IMPACT Enables developers to write formally verified web applications, potentially increasing trust and security in web services.

RANK_REASON This item describes a new tool for developers, not a frontier model release or significant industry event.

Read on HN — claude cli stories →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Lasm compiles Lean 4 to WebAssembly for verified web apps

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2 / 100
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Tool
This item describes a new tool for developers, not a frontier model release or significant industry event.
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product, paper
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Low
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Breaking (< 6h)
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COVERAGE [1]

  1. HN — claude cli stories TIER_1 English(EN) · lastmjs ·

    Show HN: Lasm – Write formally verified webapps in Lean for Node/serverless/edge