What small tool (AI or not) could really help your team deliver code faster (but you haven’t had time to build it)?

Hey! I've recently come across some OpenAI credits (and some extra motivation), and I want to build something to help developers collaborate better and deliver code faster.

The problem is, I am out of ideas. So I would like some help here – is there any tool you've thought about building to help your team deliver better, but haven't had the time/motivation/funds?

Things I thought about –

• Tool that keeps score on pull request reviews to incentivize developers to review code
• Tool that automatically assigns a suitable reviewer to a pull request using commit history

Please post any ideas you might have!

(I'm doing this for my portfolio, so everything I build will be 100% free to use)