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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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Sebastian Graf 220a242f65
feat: add @[mvcgen_invariant_type] attribute for extensible invariant classification (#12874) 
This PR adds an `@[mvcgen_invariant_type]` tag attribute so that users
can mark
custom types as invariant types for the `mvcgen` tactic. Goals whose
type is an
application of a tagged type are classified as invariants rather than
verification
conditions. The hard-coded check for `Std.Do.Invariant` is kept as a
fallback
until a stage0 update allows applying the attribute directly.

A follow-up PR (after a stage0 update) will apply
`@[mvcgen_invariant_type]` to
`Std.Do.Invariant` and remove the hard-coded fallback.

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-11 08:04:22 +00:00
.claude chore: improve CI failure reporting in release checklist (#12786) 2026-03-04 11:55:34 +00:00
.github feat: add lake-ci label to enable full Lake test suite (#12836) 2026-03-10 03:23:35 +00:00
.vscode chore: replace workspace file with .vscode/ settings (#12770) 2026-03-04 01:10:04 +00:00
doc chore: migrate more tests to new test suite (#12809) 2026-03-06 16:52:01 +00:00
images
releases_drafts chore: remove stale release draft notes (#12518) 2026-02-17 19:56:23 +00:00
script feat: unify name demangling with single Lean implementation (#12539) 2026-03-06 12:29:35 +00:00
src feat: add @[mvcgen_invariant_type] attribute for extensible invariant classification (#12874) 2026-03-11 08:04:22 +00:00
stage0 feat: add @[mvcgen_invariant_type] attribute for extensible invariant classification (#12874) 2026-03-11 08:04:22 +00:00
tests feat: add @[mvcgen_invariant_type] attribute for extensible invariant classification (#12874) 2026-03-11 08:04:22 +00:00
.gitattributes chore: migrate more tests to new test suite (#12809) 2026-03-06 16:52:01 +00:00
.gitignore chore: replace workspace file with .vscode/ settings (#12770) 2026-03-04 01:10:04 +00:00
.gitpod.Dockerfile
.gitpod.yml
.ignore
CMakeLists.txt feat: bundle leantar with Lean (#12822) 2026-03-09 20:10:59 +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
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
LICENSES feat: bundle leantar with Lean (#12822) 2026-03-09 20:10:59 +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.