A bit of meta: Claude Design -> Claude Code or Codex.
IMO Claude Code almost feels like a hack for getting web-ish products off the ground. It does such a great job of making the UI mockups interactive and providing a great "base" that the agents can use. Once you get that "base" the way you want in Claude Design, export it, then literally just tell your agent "Hey, the exported design project is /at/this/path - read it and implement it". No it's seriously been that simple - either agent can handle it. From there, you can A/B test to see which agent you prefer. The better agent is going to depend on your project and your prompting.
Good luck :)
nice. I just got a free monthly gift from gpt, codex for now. looks like people also like visuals nowadays and go for the claude vibe, which honestly makes for better optimizing and iterating fast I think. getting a plan to also see how it feels working with agents, just imagining how tech will improve by next year. thanks good luck !