codex-readme is a tool that reads program files and combines the initial contents of each file to create an input prompt. This prompt is then given to OpenAI Codex which produces a README document. The generated README usually contains useful usage examples, as well as explanations for any command line options that may be available. codex-readme was created by Tom Dörr and can be found on GitHub at https://github.com/tom-doerr/codex-readme.