Santiago Endorses Agentic Coding Book

Santiago Valdarrama posted that a book titled Agentic Coding with OpenAI Codex CLI contains everything needed to reach top 1% skill with Codex. He reported starting the book the previous week and already learning more tricks in a few days than in the prior two months. Valdarrama noted his background included extensive Claude Code experience before switching to Codex. The post links to the Amazon page for the title, which describes workflows built with Agentic Engineering, MCP, hooks, and delivery automation.