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An implementation of Scheme in Python and C++

A garden of small programming language implementations 🪴

A chapter by chapter implementation of https://raytracing.github.io/books/RayTracingInOneWeekend in Elm

A comprehensive test suite for RFC 8259 compliant JSON parsers

Atmos is the open-source runtime for infrastructure — it builds, authenticates, and ships Terraform, OpenTofu, Kubernetes, Helm, and containers the same way on your laptop, in CI, and with AI agents.

World's first open-source, agentic video production system. 12 production pipelines, 100+ tools, 700+ agent skill and production-knowledge files. Turn your AI coding assistant into a full video pro…

AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI

CI and hosting for nix-based, flakified github repos

Terraform-style, declarative Postgres schema migration. Agent friendly.

Ideas on better database design

A little website to explain that sometimes we just like to have fun!

🎓 Materials for my lectures including programming langauge design, software engineering and human-computer interaction.

Picture guessing and drawing multiplayer game

🎼 Music engraving in Typst

Nix, the purely functional package manager

A language server implementation for the Elm programming language.

[maintainer=@lucperkins]

Fast Elm tooling without the Node.js and Elm runtime overhead. Includes a linter covering the popular elm-review rule packages, dead code detection, dependency graph analysis, automated refactoring…

Inspired by syn, elm-ast is a Rust library for parsing and constructing Elm 0.19.1 ASTs.

Nix development environment example

Open-source vector similarity search for Postgres

Z-Machine version 3 interpreter for interactive fiction

NixOS Vagrant boxes [maintainer=@ifurther]

libxev is a cross-platform, high-performance event loop that provides abstractions for non-blocking IO, timers, events, and more and works on Linux (io_uring or epoll), macOS (kqueue), and Wasm + W…

Fast, accurate & comprehensive text measurement & layout

Draw a ui and make it real

A hand-picked collection of the finest of resources for the most awesome of agents, Claude Code, the undisputed champion of coding companions, from the unstoppable team at Anthropic PBC. A delectab…

High-performance browser-grade HTML5 parser