Set Up a Coding Factory With the New Codex App

This guide shows you how to use the Codex app as a “coding factory” for building a website brick by brick. Instead of relying on one long vibe-coding session until you run out of tokens, you’ll plan a modular workflow where multiple Codex agents can work on separate parts of a React app in parallel.

You’ll produce a reusable Codex workflow for building a professional SaaS-style website with parallel agents, feature branches, commits, previews, and automations that can keep working day by day.

• Entrepreneurs who need to ship a landing page and blog without hiring a developer
• Semi-technical managers who are tired of wrestling with the command line and Git
• Codex users ready to move from single prompts to automated assembly lines

You will build a team of Codex agents that can work on a React SaaS website in parallel, with a PRD guiding separate agents across shared infrastructure, pages, reviews, and automations.

• A new React app scaffolded with Vite
• A modular PRD and execution plan for a professional boilerplate SaaS website
• Parallel agents for pages such as landing, blog, about, contact, pricing, and privacy
• A main “foreman” agent that can review and merge feature branches
• Optional automations for feature building, commit review, and bug hunting

• A Mac computer
• ChatGPT Plus ($20/month) or higher
• The Codex app
• A terminal for scaffolding the initial React app
• Optional: GitHub login through gh auth login if you want Codex to publish code to GitHub

• After the core factory is running, you can reuse the PRD with Codex automations to schedule daily feature builders, commit reviewers, and bug hunters. You can also install additional Codex Skills from the sidebar to add useful tools in one click.