The project centers on formal verification, embedding proofs in Lean modules and integrating them into a CI workflow, with bindings to JavaScript and npm declared via Lasm.JS and one-line-per-function interaction.

Extensive deployment recipes and templates cover REST APIs, full-stack apps, edge functions, WASI/Fastly services, and browser apps, each with a ready-made README and a one-command start flow.

Performance benchmarks and platform constraints are documented, noting single-threaded runtimes for edge/Bun/Deno, memory requirements, and limits on ahead-of-time compilation without runtime Lean features.

A 60-second start guide demonstrates building and running a single Lean file (Main.lean) with npx @lasm/cli for a quick proof-of-concept.

Lasm ships with its own CLI (@lasm/cli) and tools, including Lean, Lake, and build tooling, supporting Node, Bun, and Deno, and producing outputs for Node servers, serverless functions, Cloudflare Workers, Vercel, Netlify, AWS Lambda, and more.

The flagship Conduit RealWorld app showcases 117 proved theorems about runtime behavior, covering authorization, follows, pagination, and shared validation, with only certain non-proved elements like some SQL statements and runtime components noted.

Documentation, support, and reference sections offer guides on getting started, JS bindings, deployment, and editor integration, with an invitation for sponsorship and community involvement.

Lasm is a Lean 4-based toolchain that compiles Lean programs ahead of time to WebAssembly for JavaScript and WebAssembly runtimes, enabling multiple deployment targets from a single Lean codebase.