TL;DR
Codex is OpenAI’s version of Claude Code. It’s very powerful, and you can use your ChatGPT subscription for it with generous usage limits.
I’ve finally launched Codex for Product Managers! It’s a complete, 100% free course taught IN Codex itself, so you learn by DOING, not reading or watching.
It’s 14 lessons and about ~6-8 hours of content.
You do not need be a PM for this course to be valuable. If you do any kind of knowledge work, you will get a lot out of it.
Here’s the link: codexforpms.com
⭐️ You can also get a special bonus module about SKILLS (from my $300 paid course) if you help me with the launch by doing this:
Go to my LinkedIn launch post
Comment “SKILLS 🥞”
Connect with me on LinkedIn (very important otherwise I can’t DM you)
➡️🔗 Here’s the post:
LONG VERSION
It’s easy to get lost with the rapid pace of AI, but this holds true: the best way for you to take advantage of all these advancements is by learning to use the AI agent tools like Claude Code, Cursor, or Codex. They’re your gateway to everything else.
I already have free courses for all the main agentic tools: Claude Code, Claude Cowork, Cursor, Google’s Antigravity…
…except OpenAI’s Codex
Not covering OpenAI’s flagship tool has been a glaring omission, and I don’t have a good reason for it other than I’ve been deep in the Claude Code world and wasn’t really using it.
But after the travesty of Opus 4.7 and the growing reputation of Codex, I decided to revisit the tool. It is delightful! GPT 5.5 is extremely capable, has a straightforward but kind of cooky personality, and Codex as an interface is much more polished than Claude Code’s desktop app.
Beyond that, OpenAI is generous and transparent with their usage limits and you can use your ChatGPT subscription for Codex.
So, at long last, I’m excited to bring you: Codex for Product Managers!
Like my other courses, it’s a 100% free and complete guide to Codex for product use cases – taught IN Codex, everything is immediately and directly applicable.
This course takes you from complete beginner to advanced user over 14 lessons and about ~6-8 hours of content:
Module 1: Fundamentals (~3 hours)
File operations: Read, transform, and create documents with file references
Visual workspace: Set up a split-screen workflow to see files as Codex works
Parallel agents: Launch multiple Codex agents to process files simultaneously
Custom sub-agents: Create permanent AI advisors with different perspectives
Project memory: Use
AGENTS.mdso Codex remembers your product contextCommands & shortcuts: Slash commands, keyboard shortcuts, power user features
Module 2: Advanced PM Work (~2 hours)
Write a PRD: Partner with Codex to write better PRDs faster with multi-perspective review
Analyze data: Funnel analysis, impact estimation, and A/B test readouts
Product strategy: Make hard strategic calls and build executive-ready slides
Module 3: Vibe Coding (~1-2 hours)
Setup & mindset: The vibe coding approach — you describe, Codex builds
Planning: Interview process to define clear requirements before building
Build & iterate: Scaffold your app and refine it with screenshots
Version control: Back up your work with GitHub
Go live: Deploy to Vercel with a real URL anyone can visit
Get all of that right here: codexforpms.com
If you want even more…. there’s also a:
⭐️ SPECIAL BONUS MODULE: SKILLS
Skills are how you create useful, repeatable, and shareable workflows for coding agents. They are one of Codex’s most powerful features.
Help me with this launch and I’ll send you the complete, 5-lesson Skills module from my $300 paid course as a thank you!
All you need to do is:
Go to my LinkedIn launch post
Comment “SKILLS 🥞”
Connect with me on LinkedIn (very important otherwise I can’t DM you)
➡️🔗 Here’s the post:
Your comment obviously helps these posts get more exposure, and I really appreciate it. More visibility = more people building with AI. That’s my mission.
Keep building,
Carl 🥞