Except for a small bug in HA, I'm quite happy with my Duette Top-Down Bottom-Up blinds. They have two rails, which allows you to cover, for example, only the bottom segment of the window, and letting light in from the top.

However, in Home Assistant they will be exposed two separate entities, which isn't that nice:

before

So today I vibe-coded a custom HA tile that combines two entities in a single slider:

after

This was done with Codex CLI; it struggled more than I would have expected to get the styling correct; I had it deploy directly to my HomeAssistant instance, then checked the dashboard manually. I would estimate overall time investment was 20 minutes. I have not looked at the code, but at 1.2k lines that is kind of more than I would expect. Then again, it does have a configuration modal too.