Formal verification for AI-generated code. Automatically extracts correctness properties from pure functions, translates them into Lean 4 theorems, and machine-checks them with Mathlib — so you get mathematical proof, not just tests, for the logic your AI coding agent produces. Works with any LLM — Claude, GPT-4, Gemini, Llama, Mistral, or any OpenAI-compatible endpoint.
Hey folks 👋,
LLMs can generate code — but can we trust it?
I built formal to bridge that gap: it extracts generated code and turns it into Lean 4 theorems, so you can actually prove correctness.
Curious to hear what you think 🚀!
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About formal on Product Hunt
“Formal verification for AI-generated code using Lean 4”
formal was submitted on Product Hunt and earned 1 upvotes and 1 comments, placing #104 on the daily leaderboard. Formal verification for AI-generated code. Automatically extracts correctness properties from pure functions, translates them into Lean 4 theorems, and machine-checks them with Mathlib — so you get mathematical proof, not just tests, for the logic your AI coding agent produces. Works with any LLM — Claude, GPT-4, Gemini, Llama, Mistral, or any OpenAI-compatible endpoint.
formal was featured in Developer Tools (511k followers), Artificial Intelligence (466.2k followers) and GitHub (41.2k followers) on Product Hunt. Together, these topics include over 171.6k products, making this a competitive space to launch in.
Who hunted formal?
formal was hunted by Davy Duperron. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how formal stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Davy Duperron