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2026-08-17 / HACKER NEWS
MathCode Is a Terminal Coding Agent That Compiles Natural-Language Math Into Lean 4 — With a Persistent REPL Cutting Checks From ~30s to ~0.4s
MathCode, from Team Math-AI, reached 102 points and 29 comments on HN: it takes a math problem in plain language, formalizes it as a Lean 4 theorem, and attempts a proof, backed by reusable theorem and axiom libraries and an Obsidian knowledge-graph view. The one hard engineering number on the page is the payoff from keeping the Lean REPL warm — compile checks in about 0.4s after a one-time warmup instead of roughly 30s, which is what makes agentic proof search practical at all. It is open source at github.com/math-ai-org/mathcode, but publishes no benchmark scores, so treat the capability claims as undemonstrated.
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