Theo on CLAUDE.md, Fable, and Using Codex for UI/UX Verification

X postTheo - t3.gg2 July 2026Opinion

Theo shares an excerpt of his CLAUDE.md file and describes using Fable alongside Codex for specific development tasks.

Key points

Theo shared the relevant section of his CLAUDE.md configuration file.
He shaped the setup through Fable to confirm it could integrate Codex for key priorities.
Theo notes that he finds Codex far better at computer use and the verification of UI/UX work.

Why it matters

Project instruction files like CLAUDE.md show how developers configure agents and combine different models based on strengths in computer use and UI verification.

Analysis

The post illustrates an informal approach to prompt and configuration tuning, relying on conversational refinement in Fable while delegating computer use and UI checking to Codex.

Original post

Theo - t3.gg

@theo · 2 July 2026

This is the relevant section of my CLAUDE.md I'll be real - I haven't read it much. Just vibed out what I was looking for with Fable, and had it confirm it can use Codex for the things I care about I still find Codex to be WAY better at computer use, verification of UI/UX work,… pic.twitter.com/VeBZogbpKW

View on X

Mentioned links

Original post by @theo on Xx.com/theo/status/2072482460122964067

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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