Pawel Huryn · 5 min read · Gen AI Tools
How to Set Up Codex as a PM and Run It Next to Claude
Read the original on productcompass.pm →
This guide shows PMs how to set up Codex to run alongside Claude Code, turning the Codex desktop app and the VS Code extension into a dual-runtime workflow for the same repository. It explains how to bridge AGENTS.md to CLAUDE.md so both AI runtimes share one source of truth and outlines quick setup steps and benefits for PM workflows, including review, editing, and mobile planning.
Key Takeaways
- Use the Codex app and VS Code extension to access and edit a repo without relying solely on VS Code, with both runtimes sharing the same repo under one OpenAI login.
- Bridge AGENTS.md to CLAUDE.md to ensure both Codex and Claude Code operate from a single source of truth, enabling cross-runtime reviews and collaboration.
- Leverage Codex features like long-running chats, the Compact mode, and bundled image generation to enhance PM workflows and multi-tool collaboration.
- Complete setup in about five minutes, switch between Codex app and VS Code without rebuilding, and edit by leaving comments for Codex or calling Codex as a peer for review.
Excerpt
Hey, Paweł here. Most PMs I talk to are heads-down on Claude (Cowork or Claude Code) and haven't tried Codex properly. The numbers say they probably should. Source: ARK Invest, via @downingARK on X Codex grew from about 200K to roughly 4M weekly active users in four months. Claude Code crossed 2M in early March. If you opened this post, you're probably one of those 2M. The other 4M are on a tool you haven't tried. And it's not just a developer tool anymore . If VS Code has felt like a wall, the Codex app is a chat window…