Vibe Coding – Johannes Neubauer

On Friday, OpenAI released GPT-5. The release triggered a wave of demonstration videos in which YouTubers showcase GPT-5’s programming skills in pair programming and vibe coding. Many of these examples revolve around creating simple, well-known games – things like flight simulators, Snake, or Angry Birds variants. Such projects exist in hundreds of versions online and are likely also in the AI’s training data. In these cases, 95–99% of the work is handled by existing libraries and frameworks.

Hence, I immediately put it to work in a small home automation project, instead. I wanted to choose an example where it wasn’t about graphics or rendering, but about cleanly implementing logic with some complexity – something that doesn’t exist in identical form all over the internet. An obvious candidate was a small but clear-cut scenario: controlling a small above-ground pool with a pump.

This blog post covers my experience building an Obsidian plugin using ChatGPT – including a minimal backend. The project is open source and available on GitHub:

Why that? To solve a real limitation I’ve hit repeatedly. Obsidian on iOS doesn’t support printing or PDF export. That’s an issue, if you want to print short notes, e.g. prep lists for talks, interview questions, or quick todos. To make it even more useful (to me), I don’t print to A4 – I use a thermal receipt printer connected to a Raspberry Pi 4B. It prints on 80 mm continuous paper, ideal for portable, foldable notes that fit in a jacket pocket. Of course, a nice addition would be to support A4, too 🤓.

The resulting notes look like this:

Tag: Vibe Coding

GPT-5 The Be-All and End-All?

Obsidian Plugin for Print