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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 a54eafb84f
refactor: decouple solve from grind in sym-based mvcgen (#13133) 
This PR refactors the sym-based VCGen (`tests/bench/mvcgen/sym`) to
separate concerns between
goal decomposition and VC discharge, following the architecture of
loom2's `mvcgen'`.

- `solve` now operates on plain `MVarId` with no knowledge of grind,
returning `List MVarId`
  in `SolveResult.goals`.
- `work` handles grind E-graph internalization: after `solve` returns
multiple subgoals, it
calls `processHypotheses` on the parent goal to share context before
forking.
- `emitVC` dispatches on a new `PreTac` enum (`.none`, `.grind`,
`.tactic`) to try solving
each VC, replacing the previous inline grind logic and post-hoc tactic
loop in the elaborator.
- The redundant `WorkItem` wrapper (which duplicated `Grind.Goal`'s
`mvarId`) is removed; the
  worklist operates directly on `Grind.Goal`.
- `GrindContext` is replaced by `PreTac` + `hypSimpMethods` fields in
`VCGen.Context`, cleanly
  separating hypothesis simplification from the discharge strategy.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-26 11:19:08 +00:00
.claude chore: speed up test suite slightly (#12969) 2026-03-20 12:24:32 +00:00
.github fix: handle duplicate nightly tag in scheduled CI runs (#13114) 2026-03-25 01:10:54 +00:00
.vscode chore: replace workspace file with .vscode/ settings (#12770) 2026-03-04 01:10:04 +00:00
doc feat: unfold and rewrap instances in inferInstanceAs and deriving 2026-03-22 13:25:46 +01:00
images
releases_drafts chore: remove stale release draft notes (#12518) 2026-02-17 19:56:23 +00:00
script fix: handle lean4-nightly toolchain prefix in release checklist (#12865) 2026-03-23 03:01:58 +00:00
src feat: verification of backwards string patterns (#13129) 2026-03-26 08:44:47 +00:00
stage0 chore: update stage0 2026-03-25 15:45:01 +00:00
tests refactor: decouple solve from grind in sym-based mvcgen (#13133) 2026-03-26 11:19:08 +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 chore: make leantar available in stage0 (#12992) 2026-03-19 20:43:43 +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 chore: migrate pkg tests (#12889) 2026-03-11 18:55:46 +00:00
flake.lock chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
flake.nix chore: add aarch64-darwin to flake (#12915) 2026-03-18 15:55:34 +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
RELEASES.md

README.md

This is the repository for Lean 4.

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Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.