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Kim Morrison 8702861945 chore: enable leanprover/skills plugin for Claude Code (#12609) 
This PR registers the
[leanprover/skills](https://github.com/leanprover/skills) plugin
marketplace in `.claude/settings.json` so that Claude Code users working
on lean4 are automatically prompted to install it.

Also un-ignores `.claude/settings.json` in `.gitignore` — the blanket
`settings.json` rule was blocking it from being tracked.

🤖 Prepared with Claude Code
2026-02-20 12:35:32 +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
chore(CMakeLists.txt): move Lean logo to make sure we can test leanemacs without installing Lean
2015-01-31 17:38:49 -08:00
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: derived value analysis for Array.uget (#12604)
2026-02-20 08:51:07 +00:00
stage0
chore: update stage0
2026-02-20 04:16:35 +00:00
tests
feat: derived value analysis for Array.uget (#12604)
2026-02-20 08:51:07 +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
chore: ignore stage0/ (for rg etc.)
2022-03-18 15:28:20 +01:00
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
doc: VS Code dev setup (#2961)
2023-11-30 08:35:03 +00:00
lean.code-workspace
chore: lean.code-workspace: fix terminal cwd (#10802)
2025-10-16 20:19:12 +00:00
LICENSE
chore: remove LICENSE header that confused GitHub
2021-11-18 09:42:35 +01:00
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.

About

Installation

See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.

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leanlean4
Readme 5 GiB
Languages
Lean 94.3%
C++ 4.1%
Python 0.6%
Shell 0.4%
CMake 0.3%