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Lasm

Open-source (MIT) compiler that turns ordinary Lean 4 programs into WebAssembly so one formally verifiable code base can ship as a Node server, AWS Lambda, Vercel, Netlify or Azure function, edge or WASI module, or a browser app, with Lean frameworks for HTTP, UI, typed RPC, DOM and KV plus JS/npm interop. Ships on npm with Lean bundled (npm create @lasm@latest); its RealWorld example carries 117 proved theorems. Early (0.3.x).

leanwebassemblyformal-verificationopen-source
Category
Frameworks & Dev ToolsWeb frameworks, local developer utilities and tooling around AI coding agents.
Website
github.comOfficial site, opens in a new tab.
Pricing
See official siteWe only list verified pricing.

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