Vasily Ilin

Lean Pool is a repository of formalized mathematics grown, maintained, and optimized by AI agents; the paper reports that as of September 21, 2026 it holds 211 completed projects and 3,228,485 lines of Lean code from 18 commit contributors, and that agent-assisted dependency upgrades, proof compression, and mathematical review keep these independently developed formalizations usable as Lean and Mathlib evolve.

Lean Pool is a repository of formalized mathematics grown, maintained, and optimized by AI agents; the paper reports that as of September 21, 2026 it holds 211 completed projects and 3,228,485 lines of Lean code from 18 commit contributors, and that agent-assisted dependency upgrades, proof compression, and mathematical review keep these independently developed formalizations usable as Lean and Mathlib evolve.