Definitely mate! I started out drawing up design docs and then I fed those to Claude Code as scaffolding. One of the docs is a phased implementation plan for it to follow and I'd review it, but Claude Code was doing the heavy lifting.
Deviated a bit from the plan on this in terms of UI, there are a few rough progress shots on my feed, but otherwise it's pretty true to the original spec. We chat about this 'slow code' approach quite a lot on the pod too
