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LLM-driven property checker for code, backed by Lean 4 and Mathlib

20 starsPython

Formal – LLM-driven property checker backed by Lean 4 and Mathlib

by yamafaktory·Apr 16, 2026·1 point·0 comments
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AI Analysis

●●●BangerWizardryBig BrainZero to One

LLM-generated Lean 4 theorems that Mathlib actually proves — genuinely novel architecture.

Strengths
  • •Three-stage LLM pipeline before Lean verification catches logical errors tests miss.
  • •Works with any OpenAI-compatible backend including local Llama and Mistral models.
  • •Honest about limitations — Lean verifies the theorem, not your actual source code.
Weaknesses
  • •Only handles pure functions — no I/O, database calls, or side effects supported.
  • •LLM selects which properties to check and may miss critical edge cases.
Target Audience

Developers working on critical pure functions and domain logic

Similar To

Lean 4 · Coq · QuickCheck

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