The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

C++ functions matching the interface and behavior of python string methods with std::string

The open source Love2D metroidvania

Perft debugger. Compare your chess engine's move generation to Stockfish

Vim exercises based on the book - Practical Vim.

Code for the 6502 microprocessor, mostly for the Replica 1 computer.

6502 enhanced BASIC unmodified source

Microsoft BASIC for 6502 (Commodore, Apple, KIM-1, AIM-65, OSI, ...)

Original source code of various Commodore computers and peripherals.

Commodore 64 BASIC and KERNAL Source

Northwind Traders is a sample application built using ASP.NET Core and Entity Framework Core.

A lightweight matrix library in Python.