Alcides Fonseca

sf-in-lean. Development repo for translating Software Foundations to Lean

latex-diff-viewer. Python

OfficeCLI. OfficeCLI is the first and best Office suite purpose-built for AI agents to read, edit, and automate Word, Excel, and PowerPoint files. Free, open-source, single binary, no Office installation required.

micro-egg. A minimal implementation of egg built live at PLDI

lpnext. An interactive/automated program verifier

virtual-dsm. Virtual DSM in a Docker container.

lean.py. Easy bindings between Lean and Python.

open-design. 🎨 The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes, landing pages, dashboards, slides, images & video — real files, HTML/PDF/PPTX/MP4 export. 🤖 Claude Code / Codex / Cursor / Gemini / OpenCode / Qwen & 20+ CLIs via BYOK.

paneru. A sliding, tiling window manager for MacOS.

PairPods. Free and open source app to share audio on macOS

hesper. Verified GPU programming framework for Lean 4. Write type-safe WebGPU shaders with formal verification, hardware-accelerated matrix ops, and cross-platform support (Metal/Vulkan/D3D12). Build provably correct GPU compute and ML inference engines.

QED. Python

bombadil. Property-based testing for web and terminal UIs

floci. Light, fluffy, and always free - The AWS Local Emulator alternative

sonar. CLI tool for inspecting and managing services listening on localhost ports

macsimize. macOS app to turn the green window button into Maximize instead of Full Screen

fm-ml. Collection of resources for research concerning Machine Learning and Formal Methods.

rodney. CLI tool for interacting with the web

Strata. Lean

autokernel. Autoresearch for GPU kernels. Give it any PyTorch model, go to sleep, wake up to optimized Triton kernels.

weave. Entity-level git merge driver. Resolves false conflicts git invents when independent agents edit the same file. ~95% reduction vs. line-based merge.

cslib. The Lean Computer Science Library (CSLib)

ANE. Training neural networks on Apple Neural Engine via reverse-engineered private APIs

timber. Ollama for classical ML models. AOT compiler that turns XGBoost, LightGBM, scikit-learn, CatBoost & ONNX models into native C99 inference code. One command to load, one command to serve. 336x faster than Python inference.

lean-cvc5. A Foreign Function Interface (FFI) to cvc5 solver in Lean.

snkv. SNKV — a lightweight key-value store focused on simplicity, security and performance file based database , written using b-tree directly. Now supports vector HNSW , Join the discussion: https://discord.gg/EUb4Y5qE

lean-calcify.

cardinal. Fastest file searching tool for macOS

aequery. A macOS command-line tool that queries scriptable applications using XPath-like expressions.

miniray. Minimal library for distributed python work. Can efficiently run CPU and GPU tasks across 100s of machines.

a1. The agent-to-code compiler that optimizes AI for speed 🏎️ and safety 🏁

ML105_Agents. This is a crash course on Agents

claude-supermemory. Enable Claude Code to learn in real-time, update it's knowledge, and grow with you, using supermemory.

umcp. A micro MCP server for stdio only (asyncio and synchronous)

Mole. 🐹 Clean, uninstall, analyze, optimize, and monitor your Mac from the terminal.

rendercv. Resume builder for academics and engineers

verina. Verina (Verifiable Code Generation Arena) is a high-quality benchmark enabling a comprehensive and modular evaluation of code, specification, and proof generation as well as their compositions.

alpha-beta-CROWN. alpha-beta-CROWN: An Efficient, Scalable and GPU Accelerated Neural Network Verifier (winner of VNN-COMP 2021, 2022, 2023, 2024, 2025)

jopa. JOPA: Java compiler in C++

librepods. AirPods liberated from Apple's ecosystem.

mcp-shark. Wireshark-like forensic analysis for Model Context Protocol communications Capture, inspect, and investigate all HTTP requests and responses between your IDE and MCP servers

gp-benchmarks. Automated feature construction framework using Genetic Programming to evolve optimized features for classification datasets.

hax. A Rust verification tool

liquidjava-tutorial. Tutorial Guide for LiquidJava

vericuda. A Coq framework giving Rust GPU kernels formal semantics and a verified bridge to NVIDIA's PTX memory model

plexm3u. Plex playlist m3u generator

Cobb. One who searches underneath the bottom of consciousness: Inception(2010)

proofofthought. Proof of thought : LLM-based reasoning using Z3 theorem proving with multiple backend support (SMT2 and JSON DSL)

tese. Jupyter Notebook

hob2hood-RAW-IR-Codes. Here you will find raw IR Codes for AEG/Electrolux hob2hood devices!

Satisfiability.jl. Specify satisfiability modulo theories problems in Julia and use the SMT-LIB format to interact with SMT solvers.

LeanTeX. Lean 4 library for pretty printing expressions as LaTeX

HRM. Hierarchical Reasoning Model Official Release

mcp-language-server. mcp-language-server gives MCP enabled clients access semantic tools like get definition, references, rename, and diagnostics.

lsp-mcp. An Model Context Protocol (MCP) server that provides LLMs/AI Agents with the capabilities of a language server protocol (LSP) server. This gives the AI the ability to get language aware context from the codebase.

quick.py. Property-based testing library for Python

milligrad. Micrograd's big brother.

Amadeus. A recreation of the Amadeus in steins;gate 0, more specifically the desktop version of Amadeus in Viktor chondria univiersity, I tried to make it as anime-accurate as possible, el psy kongroo

mewz. A unikernel designed specifically for running Wasm applications and compatible with WASI

LeroyCompilerVerificationCourse. Lean

paper-template. A template for writing CS papers with latex -- includes CI, todonotes, ...

EndSorry. Lean

constraint-solving-course. An open-source course on constraint solving

egg_recursive. A recursive interface for egg: e-graphs good without S-expresion!

lovely-jax. JAX Arrays for human consumption

heimdall-mcp-server. Your AI Coding Assistant's Long-Term Memory

oplss24-code. OCaml

mini-redis. An implementation of mini-redis in Lean 4

BigOBench. BigOBench assesses the capacity of Large Language Models (LLMs) to comprehend time-space computational complexity of input or generated code.

LeanHammer. LeanHammer is an automated reasoning tool for Lean that brings together multiple proof search and reconstruction techniques and combines them into one tool.

npbench. NPBench - A Benchmarking Suite for High-Performance NumPy

lexicase. A standardized Lexicase Selection python package

ARC-Solver. Python

LeanSearch. Python

lean4-cheatsheet. Printable (A4) overview of tactics in Lean 4 for beginners

panini. Static Grammar Inference for Ad Hoc Parsers

matplot2tikz. Save matplotlib figures as TikZ/PGFplots for smooth integration into LaTeX.

KGCompass. Knowledge Graph Enhanced Software Repair Framework

Canonical. Canonical is a performant sound and complete type inhabitation solver for dependent type theory.

strawberry. :strawberry: Strawberry Music Player

SWE-Fixer. Shell

difflogic. Train neural networks that distill into logic circuits, using JAX

PyPantograph. A Machine-to-Machine Interaction System for Lean 4.

LeanTool. A "code intepreter" for Lean

gmail-to-sqlite. Index your Gmail account to a SQLite DB and play with the data.

CanonicalLean. A Lean tactic for Canonical, a search procedure for terms in dependent type theory.

lean-lsp-mcp. Lean Theorem Prover MCP

SATySFi. A statically-typed, functional typesetting system

type-constrained-code-generation. Reproduction Package for the paper "Type-Constrained Code Generation with Language Models" [PLDI 2025]

GitDroid. A third party Android app manager for apps uploaded to GitHub releases

powerletrics. Powermetrics for Linux

maturin. Build and publish crates with pyo3, cffi and uniffi bindings as well as rust binaries as python packages

brush. An interpretable machine learning library

veil. A verifier for automated and interactive proofs about transition systems.

perf-book. The book "Performance Analysis and Tuning on Modern CPU"

LeanCourse23. Lean

lean-interval. Conservative floating point interval arithmetic in Lean

lean-metaprogramming-slides. Slides for a 2-hour lecture on Lean Metaprogramming

stainless. A multi-process browser alternative to Google Chrome.

ageLANServer. Web Server (and its launcher) for AoE 1, 2, 3 (all DE), AoE 4 and AoM: RT supporting offline multiplayer

leanverifier. Framework for specifying and proving properties—such as robustness, fairness, and interpretability—of machine learning models using Lean 4.

artifact-usability-barriers.

aeon. Programming Language designed for Program Synthesis with SMT-validation.

mlir-egglog. A toy compiler for NumPy array expressions that uses e-graphs and MLIR

benchmark-submission-2025. Repository for the submission of SMT-LIB benchmarks for the 2025 release.

llvm-pass-skeleton-rs. example LLVM pass but in Rust 🦀

monolith. ⬛️ CLI tool and library for saving complete web pages as a single HTML file

cc-lemma. Refreshing automation for inductive equational proofs using e-graphs

type-theory-valentines. type theory themed valentines

BuggyJavaJML. Java

symbolicautomata. Library for symbolic automata and symbolic visibly pushdown automata

holey. Python library for program synthesis and symbolic execution combining constraint solving and LLMs

metaprogramming. Tutorials for metaprogramming in Lean

llm. Access large language models from the command-line

Goedel-Prover. Python

LLM4EC. A list of awesome papers and resources of the intersection of Large Language Models and Evolutionary Computation.

cua. Open-source infrastructure for Computer-Use Agents. Sandboxes, SDKs, and benchmarks to train and evaluate AI agents that can control full desktops (macOS, Linux, Windows).

brax. Massively parallel rigidbody physics simulation on accelerator hardware.

evogp. A GPU-accelerated library for Tree-based Genetic Programming, leveraging PyTorch and custom CUDA kernels for high-performance evolutionary computation. It supports symbolic regression, classification, and policy optimization with advanced features like multi-output trees and benchmark tools.

Shackleton-Framework. A generic genetic programming framework that aims to make genetic programming easier for a myriad of uses. Currently, the main target is to use the framework for code optimization in tandem with the LLVM framework.

splean. Separation Logic Proofs in Lean

latte-vscode. VSCode extension for Latte - Lightweight Aliasing Tracking for Java

dice. Exact inference for discrete probabilistic programs. (Research code, more documentation and ergonomics to come)

Meelo. Self-hosted Music Server. Focused on metadata integration & UI

tylr. a tiny tile-based editor

lean4-papyrus. An LLVM interface for Lean 4. (WIP)

verified-compiler. A toy example of a verified compiler.

lean-calcify.

verbose-lean4. Natural language tactics to teach mathematics using Lean 4

servers. Model Context Protocol Servers

Sklearn-genetic-opt. Hyperparameter optimization and feature selection for scikit-learn using evolutionary algorithms. A modern alternative to GridSearchCV and RandomizedSearchCV.

vscode-aeon. Aeon VSCode Support

blackcandy. A self hosted music streaming server

gatree. Evolutionary decision trees

strive. Strive

StarCombinatoryCalculus. Lean

MachineLearningMischief. Machine Learning Mischief: Examples from the dark side of data science

transformers-GAD. [NeurIPS'24] Grammar-Aligned Decoding: An algorithm to constrain LLMs' outputs without distorting its original distribution

transformers-CFG. 🤗 A specialized library for integrating context-free grammars (CFG) in EBNF with the Hugging Face Transformers

smyth. Programming-by-example in a typed functional language with sketches. Smyth = Sketching + Myth.

Mist. A Mac utility that automatically downloads macOS Firmwares / Installers.

scrybe. Type-and-example directed program synthesis using example propagation, as described in Program Synthesis Using Example Propagation.

fedora. The Fedora Framework is an evolutionary feature engineering framework designed to optimize features for machine learning tasks

heartbeat. Prototype implementation of Heartbeat Scheduling, in C++

QuickLookVideo. This package allows macOS Finder to display thumbnails, static QuickLook previews, cover art and metadata for most types of video files.

london-foc-festive-quiz.

pygls. A pythonic generic language server

plausible. Lean

Eco2AI. eco2AI is a python library which accumulates statistics about power consumption and CO2 emission during running code.

lean-calcify. Lean

hypothesis_search. HTML

CrossHair. An analysis tool for Python that blurs the line between testing and type systems.

deal. 🤝 Design by contract for Python. Write bug-free code. Add a few decorators, get static analysis and tests for free.

pluto. Pluto: An automatic polyhedral parallelizer and locality optimizer

erc-latex-template. LaTeX template for ERC proposals

DeskPad. A virtual monitor for screen sharing

CleverAlgorithms. Clever Algorithms: Nature-Inspired Programming Recipes

django-fsm-2. Django friendly finite state machine support

ekege. A different approach to an E-graph library

EnergyAwareProgramming. TeX

experiment-runner. Tool for the automatic orchestration of experiments targeting software systems

sphinx-autodoc-typehints. Type hints support for the Sphinx autodoc extension

Slurm_tools. My tools for the Slurm HPC workload manager

smt2utils. Libraries and tools for the SMT-LIB-2 standard.

equational_theories. A project to map out the relations between different equational theories of Magmas.

Chess.lean. Chess in Lean 4

feature_engine. Feature engineering and selection open-source Python library compatible with sklearn.

sggp. Python

awesome-cfp. Curated list of open Call-for-Papers in SE/PL scientific conferences: we keep an eye on all of them!

aquarel. Styling matplotlib made easy

ssft24. Lean

MetaExamples. Examples using MetaProgramming for writing tactics etc.

eggmt. Egraphs Modulo Theories

hermitage. What are the differences between the transaction isolation levels in databases? This is a suite of test cases which differentiate isolation levels.

manim. Animation engine for explanatory math videos

Chronosymbolic-Learning. Artifact for paper "Chronosymbolic: Efficient CHC Solving with Symbolic Reasoning and Inductive Learning" in Python

pie. Python

RepairChain. AIxCC: automated vulnerability repair via LLMs, search, and static analysis

ekitai. Ekitai is a small programming language with refinement types that compiles to binary code using the LLVM ecosystem.

rv. Random variables for Rust

jixia. A static analysis tool for Lean 4.

PolyhedralCompilers. Shell

larc. Neuro-Symbolic ARC Solver in Lean4

slurm_gpu_ubuntu. Instructions for setting up a SLURM cluster using Ubuntu 18.04.3 with GPUs.

lean2wasm. Tool for compiling Lean to WASM

CARP-S. A Framework for Comparing N Hyperparameter Optimizers on M Benchmarks.

ubuntu-slurm. Steps to create a small slurm cluster with GPU enabled nodes

VerySmallFoot. A modern implementation for the Smallfoot Automated Verification Framework for Separation Logic

knuckledragger. A Low Barrier Proof Assistant

smt-talk. Code for "Constraint Solvers for the Working PL Researcher"

psb-cpp. C++ implementations of the Program Synthesis Benchmark Suite (PSB)

qspool. Dependency-free solution to spool jobs into SLURM scheduler without exceeding queue capacity limits

EnergiBridge. Jupyter Notebook

headphones. Automatic music downloader for SABnzbd

evalml. EvalML is an AutoML library written in python.

ghostborrows. An API for statically verifying adherence to Tree Borrows using ghost permissions.

synthesis. C++

amaranth. A modern hardware definition language and toolchain based on Python

plibsys. Highly portable C system library: threads and synchronization primitives, sockets (TCP, UDP, SCTP), IPv4 and IPv6, IPC, hash functions (MD5, SHA-1, SHA-2, SHA-3, GOST), binary trees (RB, AVL) and more. Native code performance.

sklearn-genetic. Genetic feature selection module for scikit-learn