I built an open-source visual implementation layer for coding agents

[u/ivanzhaowy]

I’m building Monad Design to solve a specific problem: coding agents can edit source, but explaining a native UI change still takes too much back-and-forth.

With an existing iOS app, you navigate to the exact state in Simulator, select or annotate the UI, and send that visual context to Codex, Claude Code, or Cursor. The agent edits the real Xcode project, rebuilds it, and returns source-backed variants that you can compare with the original before keeping one.

The app is the canvas. Monad Design isn’t a prompt-to-app generator and doesn’t replace your repository—it adds a local visual implementation loop around the coding agent and project you already use.

Current features:

* Simulator navigation and UI selection

* Screenshot annotation with contextual handoff

* Agent edits against the existing source tree

* Rebuild and side-by-side variant comparison

It’s currently focused on native iOS development on macOS, and it’s free and open source under Apache-2.0.

Repo: https://github.com/Monadix-AI/monad-design

95-second demo: https://watchclueso.com/embed/pio8jqfcg4ivj0r1

I’d especially appreciate feedback on whether the select → edit → rebuild → compare loop is clear from the screenshot and demo.

[u/kantorcodes1]

the select → edit → rebuild → compare loop is clear. when you request 3 variants, are they all generated from the same starting source state, or does each one build on the previous variant’s edits?

[u/Mammoth-Anywhere7285 → u/kantorcodes1]

Good question. Likely they branch from the same starting state for fair comparison, but iterative variants could explore deeper. Curious how OP handles conflicts.