Code from my series on writing a Ruby compiler in Ruby
2 files for Codex, OpenCode and Claude Code: writing-a-compiler-in-ruby AGENTS.md, writing-a-compiler-in-ruby CLAUDE.md — 4,366 tokens loaded in every session.
AGENTS.md A 28 tok CLAUDE.md A 4,338 tok These files are vidarh/writing-a-compiler-in-ruby's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.