Claude Code and Codex CLI Together: A Practical Guide to Dividing Work Between Two AI Coding Agents
English | October 8, 2026 | ASIN: B0HMBN35TF | 187 pages | Epub | 631.73 KB
Most books cover Claude Code or Codex CLI. This one covers what goes wrong when you run both, and how to set up the two so that it does not.Every output shown is an actual capture from a real machine. The few commands quoted from documentation rather than run are marked as such in the text. Templates and sample rule files are the author's examples.What is insideWhich agent gets which task, turned into thresholds you can count instead of a feeling (three or more file edits, 100 or more new lines, and so on)Calling Codex from inside Claude Code, three ways: OpenAI's official plugin (/codex:review, /codex:rescue) and the codex exec route, both run on Codex CLI 0.157.1, plus the older MCP route (codex mcp-server, removed in Codex CLI 0.154.0) for readers still on earlier versionsHow to run reviews and how to decide whether to accept a finding, so that you do not trust either agent blindlySeven failures that only happen with two agents, such as split context, double edits, and both agents making the same mistakeBuilding a small CLI tool with the two-agent setup from start to finish, with the prompts printed in full (sent in Japanese; English translations included)Turning your operating rules into files: one shared rules file that both CLAUDE.md and AGENTS.md point to (full template included)Please note: the prompts, agent replies, and some outputs in the transcripts are in Japanese, exactly as they were captured. Wherever Japanese appears, an English translation or a short note follows.Test environmentWindows 10 / Claude Code 2.1.245 / Codex CLI 0.144.4 / Node.js v24.14.1 / Python 3.12.10. The output shown was collected in August 2026. The revision sections were collected in September 2026 with Codex CLI 0.157.1 and Claude Code 2.1.283 and 2.1.284. Not tested on macOS or Linux. Anything that could not be confirmed is marked as such in the text.Who this book is forYou use one of the two tools but have not designed how to use bothYou have been stuck looping on the same problem with a single agentNobody reviews the code your AI writesIf you can type commands in a terminal, you can follow along. Years of programming experience are not required.This is an independently produced, unofficial guide. It has not been approved, reviewed, sponsored, or endorsed by Anthropic, OpenAI, or any of their affiliates. Claude, Claude Code, Anthropic, OpenAI, Codex, and other names are trademarks or product names of their respective owners and are used only to identify the subjects being discussed.The manuscript of this book was written by generative AI, and this English edition was translated by generative AI from the original Japanese edition. Humans decided what the book would cover and whether to publish it. The commands and outputs shown were run and checked before being included.
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