Master programming by recreating your favorite technologies from scratch.
PostHog is the leading platform for building self-driving products. Its developer tools include AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more.
Become a cracked AI/ML Research Engineer.
Anti-AI-slop design skill for Claude Code, Cursor, and Codex.
Multi-platform SDK for integrating GitHub Copilot Agent into apps and services.
Workshops and examples for Claude Code.
Bonsai demo.
Protocol Buffers - Google's data interchange format.
Local-first code intelligence graph for MCP and CLI. Builds a persistent map of your codebase so AI coding tools read only what matters, with benchmarked context reductions on reviews and large-repo workflows.
Open source DocuSign alternative. Create, fill, and sign digital documents.
A coding agent for open models like Kimi K3.
A vector index built on TurboQuant, written in Rust with Python bindings.
Lifelong personalized tutoring for deeper learning.
The open-source CapCut alternative.
An MCP server for Claude that provides terminal control, file-system search, and file-editing capabilities.
Incredibly fast JavaScript runtime, bundler, test runner, and package manager - all in one.
Abseil Common Libraries for C++.
Production-grade engineering skills for AI coding agents.
A YAML parser and emitter in C++.
Skills for real engineers, straight from the author's Claude directory.