The first link contains a banner that perfectly illustrates the tragic moment we're in: "Due to non-renewed funding, several Sea Ice Today tools and services are now suspended or reduced."
Interesting, I'll be sure to check it out. It sounds pretty similar to the tool I built which lets you edit a "plan" in a text editor to assign commits to feature branches - the plan is saved so it can be amended continuously.
I've settled on a workflow that reverses the situation. I simply commit all my work to the main branch and cherry pick commits into temporary feature branches only when submitting PRs.
This way I only need to worry about maintaining a single consistent lineage of commits. I've been using this workflow for about a year now and find it to be much easier than juggling and rebasing feature branches.