Show HN: CSS Studio. Design by hand, code by agent

Hi HN! I've just released CSS Studio, a design tool that lives on your site, runs on your browser, sends updates to your existing AI agent, which edits any codebase. You can actually play around with the latest version directly on the site.

Technically, the way this works is you view your site in dev mode and start editing it. In your agent, you can run /studio which then polls (or uses Claude Channels) an MCP server. Changes are streamed as JSON via the MCP, along with some viewport and URL information, and the skill has some instructions on how best to implement them.

It contains a lot of the tools you'd expect from a visual editing tool, like text editing, styles and an animation timeline editor.

https://cssstudio.ai

CSS Studio. Design by hand. Code by agent.

A visual CSS editor in your browser. Adjust styles with sliders and pickers, and your AI agent writes the changes to source.

CSS Studio

The landing page feels tacky to me. It has a similar style to what I’ve seen LLMs churn out across the internet. Unclear if it’s actually generated or not but it’s at least in that style.

For a design product, I’d expect it to have more personality.

I’d recommend reving the landing by hand. The sense I get is that this tool can make a site that looks like everyone else’s. It would be neat to see something unique.

This was my biggest take, when I see someone selling a design tool that’s looks very much like designed by LLM, that’s a red flag. I got the exact same vibe, no idea whether it was a prompt or a detailed design, but right now it looks like output of a prompt and not hand crafted.

Given the whole idea is selling a design tool that’s looks very gives user a sense of they can control details, this page doesn’t deliver that at all. I’d focus on the design, because that’s the biggest demo of your product maybe even bigger than the demo.

Imagine a unique website that users looks and feel like I wish this was my website. A rare instance visual design actually matters for a startup :)

I think it's a good point. I'm going to spend a bit more time on the design - and if sales continue well then I can look at getting a designer.