| We are currently developing Lean 4. The [Lean 4 manual](https://leanprover.github.io/lean4/doc/) (work in progress) will give you an overview of the language. | |
| [Lean 3](https://github.com/leanprover/lean) is still the latest official release. | |
| This repository contains work in progress. | |
| **Important**. Unless you are one of our collaborators | |
| - We strongly suggest you use Lean 3. | |
| - Pull requests are not welcome. | |
| - New issues are not welcome, and will be closed without any feedback. |