The Codex Migration Playbook

You opened Claude Code this morning and felt it immediately: the tool that used to feel like magic now feels crowded, expensive, and unpredictable.

So you start looking at OpenAI's Codex. Not because you want another AI coding toy, but because you want a cleaner workflow that can actually ship.

The mistake is treating the migration like a settings change. This book treats it like a 30-day build sprint.

The Codex Migration Playbook shows you how to switch to OpenAI Codex, build twelve real projects, and turn your new stack into paid work.

By Day 1, you have the 5-tool Codex stack installed and a real session log on disk. By Day 7, you have a deployable SaaS project with a Stripe test charge. By Day 14, you have a weekly quota tracker that keeps your Codex workflow productive. By Day 21, you have a published Codex Skill. By Day 30, you have twelve shipped projects, a rate card, and a credibility kit you can use to start paid client conversations.

This is not another intro-to-Codex guide.

Most AI coding books stop at prompts, CLI setup, and generic productivity advice. This one is built around shipped artifacts: parsers, dashboards, Skills, routing layers, SaaS projects, recovery playbooks, and portfolio pieces that prove you can use Codex in the real world.

What you build inside:

The 5-tool Codex stack with real install commands and working configs.
A deployed SaaS project with a Stripe test charge.
A 60-line parser that reads ~/.codex/sessions/ and turns sessions into a dollar ledger.
A weekly quota tracker for getting more output from your Codex workflow.
A multi-provider routing layer across Codex, Claude, OpenCode, Gemini, OpenClaw, and local Qwen.
A failure-recovery playbook for compaction breaks, permission loops, context limits, and broken agent runs.
A published Skill, Plugin, or consulting artifact tied to your GitHub handle.
A rate card and credibility kit for turning the portfolio into paid work.



The goal is not to "learn Codex." The goal is to migrate with receipts.

When someone asks what you can build with Codex, you should not have to explain your workflow from scratch. You should be able to show the stack, the projects, the logs, the deployed app, the published Skill, and the offer.

If you are switching from Claude Code to Codex, do not just move your prompts over.

Switch the stack. Build the projects. Turn the migration into paid work.