Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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Kim Morrison 4cdc199f77
chore: revert reducibility change to HasSSubset for now (#12403)
This PR reverts `attribute [reducible] HasSSubset.SSubset` from #12368,
as it is not immediately needed, and causes breakages in Mathlib.
2026-02-10 06:33:38 +00:00
.claude doc: add changelog label instructions to CLAUDE.md (#12227) 2026-01-29 03:24:23 +00:00
.github chore: revert "chore: CI: avoid fetching full repo in PR Release (#12309)" 2026-02-09 13:12:35 +00:00
doc doc: clarify release notes title format requirements (#12182) 2026-01-27 08:08:47 +00:00
images
releases_drafts
script chore: reformat all cmake files (#12218) 2026-01-28 18:23:08 +00:00
src chore: revert reducibility change to HasSSubset for now (#12403) 2026-02-10 06:33:38 +00:00
stage0 chore: update stage0 2026-02-07 11:52:08 +00:00
tests fix: handling of ite/dite expressions in cbv tactic (#12361) 2026-02-09 15:00:10 +00:00
.gitattributes
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.gitpod.Dockerfile
.gitpod.yml
.ignore
CMakeLists.txt chore: reformat all cmake files (#12218) 2026-01-28 18:23:08 +00:00
CMakePresets.json
CODEOWNERS
CONTRIBUTING.md
flake.lock
flake.nix
lean-toolchain
lean.code-workspace
LICENSE
LICENSES
README.md
RELEASES.md

This is the repository for Lean 4.

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Installation

See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.