Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
Find a file
Lean stage0 autoupdater c03fbddef0 chore: update stage0
2026-02-23 00:04:52 +00:00
.claude chore: CLAUDE.md: restrict build parallelism (#12624) 2026-02-22 14:35:05 +00:00
.github feat: lazy initialization of closed terms (#12044) 2026-02-20 08:45:15 +00:00
doc chore: improve release command PR status checking (#12536) 2026-02-17 21:21:30 +00:00
images
releases_drafts chore: remove stale release draft notes (#12518) 2026-02-17 19:56:23 +00:00
script fix: update bump branch toolchain to nightly for all repos (#12586) 2026-02-19 13:04:26 +00:00
src feat: enable backward.whnf.reducibleClassField (#12538) 2026-02-22 23:22:14 +00:00
stage0 chore: update stage0 2026-02-23 00:04:52 +00:00
tests feat: enable backward.whnf.reducibleClassField (#12538) 2026-02-22 23:22:14 +00:00
.gitattributes doc: grove: update and add String data (#11551) 2025-12-08 16:49:37 +00:00
.gitignore chore: enable leanprover/skills plugin for Claude Code (#12609) 2026-02-20 12:35:32 +00:00
.gitpod.Dockerfile
.gitpod.yml
.ignore
CMakeLists.txt chore: fix repeated cmake calls breaking the build (#12598) 2026-02-19 16:23:47 +00:00
CMakePresets.json
CODEOWNERS
CONTRIBUTING.md
flake.lock chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
flake.nix chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
lean-toolchain
lean.code-workspace
LICENSE
LICENSES
README.md
RELEASES.md

This is the repository for Lean 4.

About

Installation

See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.