Repositories list

• lean4

  Public
  Lean 4 programming language and theorem prover

  leanlean4

  leanlean4

  Lean

  •

  Apache License 2.0

  •1.1k1.1k forks in leanprover/lean4•9.6k9.6k stars in leanprover/lean4•1.1k1.1k issues in leanprover/lean4•728728 pull requests in leanprover/lean4•Updated Oct 23, 2026Oct 23, 2026

• lean4-pr-releases

  Public
  Automated releases from leanprover/lean4 PRs

  33 forks in leanprover/lean4-pr-releases•33 stars in leanprover/lean4-pr-releases•00 issues in leanprover/lean4-pr-releases•00 pull requests in leanprover/lean4-pr-releases•Updated Oct 23, 2026Oct 23, 2026

• lean-kernel-arena

  Public
  Lean

  •

  Apache License 2.0

  •3737 forks in leanprover/lean-kernel-arena•5151 stars in leanprover/lean-kernel-arena•00 issues in leanprover/lean-kernel-arena•11 pull request in leanprover/lean-kernel-arena•Updated Oct 23, 2026Oct 23, 2026

• lean-beam

  Public
  Claude/Codex skill and local workflow layer for efficient interaction with Lean 4 and Monte-Carlo Tree Search.

  Lean

  •

  Apache License 2.0

  •55 forks in leanprover/lean-beam•4242 stars in leanprover/lean-beam•1414 issues in leanprover/lean-beam•2222 pull requests in leanprover/lean-beam•Updated Oct 23, 2026Oct 23, 2026

• lean-eval-submissions

  Public
  Submission pipeline and results store for the lean-eval benchmark (https://github.com/leanprover/lean-eval)

  Python

  •

  Apache License 2.0

  •33 forks in leanprover/lean-eval-submissions•99 stars in leanprover/lean-eval-submissions•2222 issues in leanprover/lean-eval-submissions•33 pull requests in leanprover/lean-eval-submissions•Updated Oct 23, 2026Oct 23, 2026

• cslib

  Public
  The Lean Computer Science Library (CSLib)

  computer-sciencelean

  computer-sciencelean

  Lean

  •

  Apache License 2.0

  •216216 forks in leanprover/cslib•776776 stars in leanprover/cslib•5050 issues in leanprover/cslib•160160 pull requests in leanprover/cslib•Updated Oct 23, 2026Oct 23, 2026

• lean-eval-leaderboard

  Public
  Results for the lean-eval benchmark (https://github.com/leanprover/lean-eval)

  Lean

  •

  Apache License 2.0

  •66 forks in leanprover/lean-eval-leaderboard•2828 stars in leanprover/lean-eval-leaderboard•44 issues in leanprover/lean-eval-leaderboard•22 pull requests in leanprover/lean-eval-leaderboard•Updated Oct 22, 2026Oct 22, 2026

• lean-eval

  Public
  Comparator-based Lean formal mathematics eval

  Lean

  •

  Apache License 2.0

  •4242 forks in leanprover/lean-eval•4949 stars in leanprover/lean-eval•1010 issues in leanprover/lean-eval•1414 pull requests in leanprover/lean-eval•Updated Oct 22, 2026Oct 22, 2026

• downstream-lean4

  Public
  A collection of packages downstream of Lean 4.

  Lean

  •55 forks in leanprover/downstream-lean4•66 stars in leanprover/downstream-lean4•00 issues in leanprover/downstream-lean4•4141 pull requests in leanprover/downstream-lean4•Updated Oct 22, 2026Oct 22, 2026

• verso

  Public
  Lean documentation authoring tool

  Lean

  •

  Apache License 2.0

  •126126 forks in leanprover/verso•397397 stars in leanprover/verso•7474 issues in leanprover/verso•1212 pull requests in leanprover/verso•Updated Oct 22, 2026Oct 22, 2026

• verso-blueprint

  Public
  Build structured Proof Blueprints with Verso

  Lean

  •55 forks in leanprover/verso-blueprint•3535 stars in leanprover/verso-blueprint•11 issue in leanprover/verso-blueprint•1313 pull requests in leanprover/verso-blueprint•Updated Oct 22, 2026Oct 22, 2026

• radar-bench-verso

  Public
  Radar benchmarking for verso

  Python

  •00 forks in leanprover/radar-bench-verso•00 stars in leanprover/radar-bench-verso•00 issues in leanprover/radar-bench-verso•11 pull request in leanprover/radar-bench-verso•Updated Oct 22, 2026Oct 22, 2026

• vscode-lean4

  Public
  VS Code extension for the Lean 4 programming language and theorem prover

  vscodelean

  vscodelean

  TypeScript

  •

  Apache License 2.0

  •104104 forks in leanprover/vscode-lean4•314314 stars in leanprover/vscode-lean4•5151 issues in leanprover/vscode-lean4•1111 pull requests in leanprover/vscode-lean4•Updated Oct 22, 2026Oct 22, 2026

• lean4-nightly

  Public
  Nightly builds

  33 forks in leanprover/lean4-nightly•2323 stars in leanprover/lean4-nightly•00 issues in leanprover/lean4-nightly•00 pull requests in leanprover/lean4-nightly•Updated Oct 22, 2026Oct 22, 2026

• con-ron

  Public
  A rust port of con-leche

  Lean

  •

  Apache License 2.0

  •55 forks in leanprover/con-ron•3333 stars in leanprover/con-ron•11 issue in leanprover/con-ron•00 pull requests in leanprover/con-ron•Updated Oct 21, 2026Oct 21, 2026

• con-leche

  Public
  An external lean checker with a proof of consistency

  Lean

  •

  Apache License 2.0

  •1010 forks in leanprover/con-leche•140140 stars in leanprover/con-leche•11 issue in leanprover/con-leche•00 pull requests in leanprover/con-leche•Updated Oct 21, 2026Oct 21, 2026

• comparator-live

  Public
  An online live.lean-lang.org-style playground for running the Comparator tool

  TypeScript

  •

  Apache License 2.0

  •00 forks in leanprover/comparator-live•33 stars in leanprover/comparator-live•00 issues in leanprover/comparator-live•00 pull requests in leanprover/comparator-live•Updated Oct 21, 2026Oct 21, 2026

• reference-manual

  Public
  The Lean reference manual

  Lean

  •

  Apache License 2.0

  •6969 forks in leanprover/reference-manual•136136 stars in leanprover/reference-manual•117117 issues in leanprover/reference-manual•2020 pull requests in leanprover/reference-manual•Updated Oct 21, 2026Oct 21, 2026

• presentations

  Public
  lean-related presentations

  TeX

  •

  Apache License 2.0

  •1616 forks in leanprover/presentations•1818 stars in leanprover/presentations•11 issue in leanprover/presentations•33 pull requests in leanprover/presentations•Updated Oct 21, 2026Oct 21, 2026

• Pantograph

  Public
  (Mirror) A Machine-to-Machine Interaction System for Lean 4

  machine-learningtheorem-provingproof-assistant+ 1

  machine-learningtheorem-provingproof-assistantlean4

  Lean

  •

  Apache License 2.0

  •2323 forks in leanprover/Pantograph•8484 stars in leanprover/Pantograph•00 issues in leanprover/Pantograph•00 pull requests in leanprover/Pantograph•Updated Oct 20, 2026Oct 20, 2026

• lean-workbench

  Public
  Online Lean Workbench

  TypeScript

  •

  Apache License 2.0

  •11 fork in leanprover/lean-workbench•1111 stars in leanprover/lean-workbench•3838 issues in leanprover/lean-workbench•22 pull requests in leanprover/lean-workbench•Updated Oct 19, 2026Oct 19, 2026

• downstream

  Public
  Scripts for managing lake package monorepos.

  TypeScript

  •22 forks in leanprover/downstream•00 stars in leanprover/downstream•00 issues in leanprover/downstream•55 pull requests in leanprover/downstream•Updated Oct 19, 2026Oct 19, 2026

• radar

  Public
  "Do you know how fast you were going?"

  Java

  •11 fork in leanprover/radar•77 stars in leanprover/radar•00 issues in leanprover/radar•00 pull requests in leanprover/radar•Updated Oct 19, 2026Oct 19, 2026

• downstream-lean4-fork-mathlib4

  Public
  A fork of mathlib4 used by downstream-lean4 to open PRs

  1.8k1.8k forks in leanprover/downstream-lean4-fork-mathlib4•00 stars in leanprover/downstream-lean4-fork-mathlib4•00 issues in leanprover/downstream-lean4-fork-mathlib4•00 pull requests in leanprover/downstream-lean4-fork-mathlib4•Updated Oct 19, 2026Oct 19, 2026

• lean-llvm

  Public
  Custom-built LLVM toolchain for use in Lean 4

  66 forks in leanprover/lean-llvm•88 stars in leanprover/lean-llvm•00 issues in leanprover/lean-llvm•11 pull request in leanprover/lean-llvm•Updated Oct 19, 2026Oct 19, 2026

• reservoir-index

  Public
  Registry index for Reservoir

  Lean

  •33 forks in leanprover/reservoir-index•88 stars in leanprover/reservoir-index•11 issue in leanprover/reservoir-index•00 pull requests in leanprover/reservoir-index•Updated Oct 18, 2026Oct 18, 2026

• verso-web-components

  Public
  A collection of reusable components from the Lean website designed build related sites with the same look and feel.

  Lean

  •

  Apache License 2.0

  •11 fork in leanprover/verso-web-components•33 stars in leanprover/verso-web-components•00 issues in leanprover/verso-web-components•33 pull requests in leanprover/verso-web-components•Updated Oct 15, 2026Oct 15, 2026

• verso-templates

  Public
  Templates for getting started with Verso

  Lean

  •55 forks in leanprover/verso-templates•4040 stars in leanprover/verso-templates•55 issues in leanprover/verso-templates•11 pull request in leanprover/verso-templates•Updated Oct 15, 2026Oct 15, 2026

• verso-slides

  Public
  Lean

  •

  Apache License 2.0

  •55 forks in leanprover/verso-slides•1818 stars in leanprover/verso-slides•1010 issues in leanprover/verso-slides•44 pull requests in leanprover/verso-slides•Updated Oct 15, 2026Oct 15, 2026

• hex

  Public
  Verified computational algebra in Lean 4: aggregator for the released hex libraries

  Lean

  •

  Apache License 2.0

  •33 forks in leanprover/hex•3535 stars in leanprover/hex•00 issues in leanprover/hex•00 pull requests in leanprover/hex•Updated Oct 15, 2026Oct 15, 2026