A language with lexical effect handlers and lightweight effect polymorphism

A safe, easy systems language

A collection of study materials for AI compilers and systems.

Tactics for discharging Lean goals into SMT solvers.

Experiments on automation for Lean

A verifier for automated and interactive proofs about transition systems. This repository is a public mirror with stable development snapshots. Submit issues and PRs here.

Install NixOS everywhere via SSH [maintainers=@Mic92 @Lassulus @phaer @Enzime @a-kenji]

Files associated with the course Interactive Theorem Proving at LMU SoSe 2025

The "batteries included" extended library for the Lean programming language and theorem prover

Formal specification of the Haskell Language Report

A minimal development of SSA theory

A typst-powered thermal printer

A translation framework for eliminating definitional equalities in Lean

Modeling and Proving in Computational Type Theory

Minimal implementations for dependent type checking and elaboration

Research on theory of programming languages λ, compilers, interpreters, functional programming, formal methods, logic etc.

Write C shims from within Lean code.

A verification toolchain for Rust programs

An open source graphics editor for 2025: comprehensive 2D content creation tool suite for graphic design, digital art, and interactive real-time motion graphics — featuring node-based procedural ed…

A collection of resources for learning type theory and type theory adjacent fields.

Beginner's guide to Tactic Programming in Lean

White-box automation for Lean 4

A list of awesome lean4 projects. Feel free to add your project.

A calculator for mathematical formulas written in rust

A lightweight Datalog engine in Rust

Graph data structure library for Rust.