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The AI proved a 2025 borrow-checker paper in Lean over 2 to 3 weeks

The AI was poked along over 2 to 3 weeks to formally prove a 2025 CS paper (borrow checker) in Lean, now used as the basis for a new systems language.

How it works

  1. The AI is poked along over 2 to 3 weeks
  2. Formally proves the 2025 computer science paper in Lean
  3. The proof is now the basis for a new systems language

Why it’s worth knowing

Poked along is honest: the human steered, the machine carried the proof.

Where it’s from

Summarized from a public post on news.ycombinator.com. See the original ↗

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