Agentic Design Patterns in Production

Origin Story This project started as a sequel. Late last year I published Agentic Patterns in OpenAI's Codex — a project that took the 21 agentic design patterns from Antonio Gulli's textbook and located them inside OpenAI's Codex CLI. That project proved a method: take a real agent runtime, read the source, extract the patterns the textbook didn't anticipate. Then, on March 31 2026, the Claude…