I asked ChatGPT about integrating a to-do mod with (external) project management software, and it created a complete turnkey solution to integrate Factorio and Trello! Would you be willing to look into integrating Trello--or w/e--into your mod? I was surprised just how easily a 57-line Python script + 39-line LUA script addition links the two!
If y'all are interested, here are the chat itself and the file it created. (I can't verify whether or not it will actually work, but it will at least be a framework to start from.):
The mod is designed to work fully within Factorio itself, and adding external dependencies would complicate things unnecessarily for most players. I’m also not sure if such an integration is even possible.
But thanks for sharing the idea! Feel free to let me know if you have more suggestions.