Codex Blue BookBuild Real Projects with Codex

Set project rules, check pages in a real browser, follow progress on your phone, and build a subscription app through hands-on examples.

Make Codex Follow Your Project Rules

Use AGENTS.md to define your stack, safe edit boundaries, and checks. Stop repeated failures before they turn into endless edits.

Generate Project Rules

Open the page, click controls, inspect phone and desktop layouts, then fix issues based on what actually renders.

Explore Browser Testing

Send build failures and approval requests to Feishu. Check progress and handle key decisions from your phone.

Explore Feishu Workflow

Follow the Next.js, Supabase, and Stripe example to connect accounts, payments, and membership access.

Explore SaaS MVP