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Mac Malone 4384344465 feat: lake: use trace mtime for arts when possible (#12799) 
This PR changes Lake to use the modification times of traces (where
available) for artifact modification times.

When artifacts are hard-linked from the cache, they retain the
modification time of the artifact in the cache. Thus, the artifact
modification time is an unreliable metric for determining whether an
artifact is up-to-date relative to other artifacts in the presence of
the cache. The trace file, however, is modified consistently when the
artifacts are updated, making it the most reliable indicator of
modification time.
2026-03-05 04:53:59 +00:00
.claude
chore: improve CI failure reporting in release checklist (#12786)
2026-03-04 11:55:34 +00:00
.github
fix: use pull_request_target for label-triggered workflows (#12638)
2026-03-01 19:20:56 +11:00
.vscode
chore: replace workspace file with .vscode/ settings (#12770)
2026-03-04 01:10:04 +00:00
doc
chore: replace workspace file with .vscode/ settings (#12770)
2026-03-04 01:10:04 +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: handle CACHE STRING syntax in LEAN_VERSION_IS_RELEASE check (#12800)
2026-03-05 02:09:51 +00:00
src
feat: lake: use trace mtime for arts when possible (#12799)
2026-03-05 04:53:59 +00:00
stage0
chore: update stage0
2026-03-04 16:32:35 +00:00
tests
feat: add cbv.maxSteps option to control step limit (#12788)
2026-03-04 16:05:57 +00:00
.gitattributes
doc: grove: update and add String data (#11551)
2025-12-08 16:49:37 +00:00
.gitignore
chore: replace workspace file with .vscode/ settings (#12770)
2026-03-04 01:10:04 +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: fail build on non-make generators (#12690)
2026-02-25 13:59:40 +00:00
CMakePresets.json
chore: fix ci for new test suite (#12704)
2026-02-27 23:25:37 +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
chore: relative lean-toolchains (#12652)
2026-02-25 10:23:35 +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%