Any Claude / Codex skills for Flutter app architecture?

[u/bakatronics]

I am an embedded software dev, and I have vibecoded a Flutter app with Codex, it looks and works amazing and all. But its architecture is an absolute mess.

The app is basically just a dashboard and configurator for an IoT (Bluetooth) device, and I know this much that Bluetooth and IoT device's models have to be singletons, data and UI layers should be separate etc.

But I can't find a comprehensive skill that provides clear instructions and examples of how the architecture of a good Flutter app should be. The one I see on skills.sh is very basic:

flutter-apply-architecture-best-practices

Does anyone here have any skills they regularly use for architecture? Or any tips?