Unciv contains built-in capabilities for packing images and autoupdating uniques.
You can automate these updates by adding a GitHub Actions workflow to your repository.
- In your Github page go to "actions" tab
- Suggested for this repo > Simple workflow > "Configure"
- Copy the text of [this file](https://github.com/yairm210/Unciv-IV-mod/blob/master/.github/workflows/autoupdate.yml) ("copy raw file") to the new file in your repo
- Change the file name to "autoupdate.yml" at the top
- Try to shrink PNGs (this is lossless, the pixel data remains the same but the file takes less space)
- Try to autoupdate deprecated uniques
If there are changes, this will create a PR to your repo - [here's an example](https://github.com/yairm210/Unciv-IV-mod/pull/31) - which you can choose to accept
If you see that the autoupdate isn't 100% - in which case talk to me and we'll sort it out 🙂