We recently had a small IRC chat in #tor-dev about the project. Deepak was wondering if the project could be implemented as browser extension. It would be interesting to explore this direction in more detail -- perhaps in parallel to an implementation based on OONI.
Another important side-project I didn't mention yet is unit and integration testing. For last year's GSoC, EvilGenius was developed which could be helpful: https://github.com/TheTorProject/EvilGenius
Finally, there's building and bundling. Once there's code, we need a way to bundle it into a single executable.
Cheers, Philipp