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Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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Henrik Böving 5c4f61aa26
refactor: remove unnecessary type correction heuristic from the compiler (#12617) 
This PR removes the type correction heuristic from the RC pass as it is
already present in the
boxing pass. Previously the boxing pass did not try to correct types so
the RC pass did. We
discovered issues with not doing this in the boxing pass and
accidentally maintained two corrections
for a while. This PR merges both and removes the one from RC.
2026-02-20 14:57:04 +00:00
.claude chore: enable leanprover/skills plugin for Claude Code (#12609) 2026-02-20 12:35:32 +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 refactor: remove unnecessary type correction heuristic from the compiler (#12617) 2026-02-20 14:57:04 +00:00
stage0 chore: update stage0 2026-02-20 13:32:43 +00:00
tests fix: prevent cbv crash on dependent projections with @[cbv_eval] rewrites (#12612) 2026-02-20 14:38:15 +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 chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.gitpod.yml chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.ignore
CMakeLists.txt chore: fix repeated cmake calls breaking the build (#12598) 2026-02-19 16:23:47 +00:00
CMakePresets.json chore: CI: enable leak sanitizer again (#11339) 2025-11-27 18:32:35 +00:00
CODEOWNERS chore: make @hargoniX code owner of the compiler (#10732) 2025-10-10 04:43:38 +00:00
CONTRIBUTING.md doc: triage 2024-07-26 18:24:06 +02:00
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 chore: lean.code-workspace: fix terminal cwd (#10802) 2025-10-16 20:19:12 +00:00
LICENSE
LICENSES feat: ship cadical (#4325) 2024-08-23 09:13:27 +00:00
README.md doc: update URLs that are currently pointing to redirects (#10397) 2025-09-17 15:50:07 +00:00
RELEASES.md chore: updates to release_checklist.md (#7817) 2025-04-04 03:45:36 +00:00

README.md

This is the repository for Lean 4.

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Contributing

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Building from Source

See Building Lean.