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    89 repositories

    • queueboard

      Public
      AspectJ
      •
      Apache License 2.0
      •0•0•0•2•Updated Feb 20, 2026Feb 20, 2026

    • iris-lean

      Public
      Lean 4 port of Iris, a higher-order concurrent separation logic framework
      Lean
      •
      Apache License 2.0
      •30•155•17•8•Updated Feb 20, 2026Feb 20, 2026

    • blog

      Public
      Source for the community blog
      Python
      •26•7•4•3•Updated Feb 20, 2026Feb 20, 2026

    • mathlib4

      Public
      The math library of Lean 4
      lean4
      Lean
      •
      Apache License 2.0
      •1.1k•2.9k•268•2.2k•Updated Feb 20, 2026Feb 20, 2026

    • mathlib4-nightly-testing

      Public
      nightly-testing and lean-pr-testing branches of Mathlib
      Lean
      •
      Apache License 2.0
      •1.1k•1•0•15•Updated Feb 20, 2026Feb 20, 2026

    • batteries

      Public
      The "batteries included" extended library for the Lean programming language and theorem prover
      leanlean4
      Lean
      •
      Apache License 2.0
      •134•361•28•44•Updated Feb 20, 2026Feb 20, 2026

    • leanprover-community.github.io

      Public
      Hosts the website for mathlib and other Lean community infrastructure.
      CSS
      •
      MIT License
      •170•72•18•8•Updated Feb 20, 2026Feb 20, 2026

    • mathlib-changelog

      Public
      Lean
      •
      MIT License
      •0•14•3•0•Updated Feb 20, 2026Feb 20, 2026

    • mathlib_stats

      Public
      Display gitstats output on the mathlib website
      Python
      •6•2•0•0•Updated Feb 20, 2026Feb 20, 2026

    • duper

      Public
      lean4
      Lean
      •
      Apache License 2.0
      •12•105•1•0•Updated Feb 19, 2026Feb 19, 2026

    • lean-auto

      Public
      Experiments on automation for Lean
      Lean
      •
      Apache License 2.0
      •26•162•10•0•Updated Feb 19, 2026Feb 19, 2026

    • repl

      Public
      A simple REPL for Lean 4, returning information about errors and sorries.
      Lean
      •
      Apache License 2.0
      •65•189•25•19•Updated Feb 19, 2026Feb 19, 2026

    • sphere-eversion

      Public
      Formalization of the existence of sphere eversions
      Lean
      •
      Apache License 2.0
      •14•47•0•1•Updated Feb 18, 2026Feb 18, 2026

    • flt-regular

      Public
      Fermat's Last Theorem for regular primes
      Lean
      •
      Apache License 2.0
      •3•61•0•0•Updated Feb 18, 2026Feb 18, 2026

    • queueboard-core

      Public
      testing a split of code and data for the queueboard
      Python
      •
      Apache License 2.0
      •7•2•25•0•Updated Feb 18, 2026Feb 18, 2026

    • aesop

      Public
      White-box automation for Lean 4
      lean4
      Lean
      •
      Apache License 2.0
      •48•340•37•5•Updated Feb 17, 2026Feb 17, 2026

    • ProofWidgets4

      Public
      Helper toolkit for creating your own Lean 4 UserWidgets
      visualizationleanlean4
      Lean
      •
      Apache License 2.0
      •44•183•13•1•Updated Feb 17, 2026Feb 17, 2026

    • import-graph

      Public
      Tool to analyse the import structure of lean projects.
      lean4
      Lean
      •
      Apache License 2.0
      •13•18•2•0•Updated Feb 17, 2026Feb 17, 2026

    • plausible

      Public
      Lean
      •
      Apache License 2.0
      •18•81•0•7•Updated Feb 17, 2026Feb 17, 2026

    • quote4

      Public
      Intuitive, type-safe expression quotations for Lean 4.
      lean4
      Lean
      •
      Apache License 2.0
      •19•101•17•8•Updated Feb 17, 2026Feb 17, 2026

    • SpliceBot

      Public
      MIT License
      •2•0•0•5•Updated Feb 17, 2026Feb 17, 2026

    • mathlib4_copy

      Public
      A fork of the mathlib4 repo with CI disabled
      Lean
      •
      Apache License 2.0
      •1.1k•0•0•0•Updated Feb 17, 2026Feb 17, 2026

    • azure-scripts

      Public
      scripts and cron jobs for Azure
      Python
      •5•1•0•0•Updated Feb 13, 2026Feb 13, 2026

    • SpliceBot-testing-fork

      Public
      MIT License
      •2•0•0•0•Updated Feb 13, 2026Feb 13, 2026

    • bors-ng

      Public
      👁 A merge bot for GitHub Pull Requests
      Elixir
      •
      Apache License 2.0
      •184•2•0•0•Updated Feb 13, 2026Feb 13, 2026

    • LeanSearchClient

      Public
      Syntax for searching with natural language from Lean, using https://leansearch.net/ (may extend to other services)
      Lean
      •
      Apache License 2.0
      •8•30•4•1•Updated Feb 12, 2026Feb 12, 2026

    • privilege-escalation-bridge

      Public
      TypeScript
      •
      Apache License 2.0
      •0•0•0•0•Updated Feb 11, 2026Feb 11, 2026

    • docgen-action

      Public
      Action to generate Lean documentation pages
      JavaScript
      •5•4•8•2•Updated Feb 9, 2026Feb 9, 2026

    • mathlib-manual

      Public archive
      Lean
      •
      Apache License 2.0
      •49•1•0•0•Updated Feb 4, 2026Feb 4, 2026

    • lean4game

      Public
      Server to host lean games.
      reactlean4
      TypeScript
      •
      GNU General Public License v3.0
      •74•403•106•12•Updated Jan 30, 2026Jan 30, 2026