I am wanting to unrecord everything dependent on one change.

Using pijul help unrecord, I found out that you have to list all the changes.

A change can only be unrecorded if all changes that depend on it are also unrecorded in the same operation.

I can find no way to list all the changes that depend on a change.

Good question. There is no command to do that, yet it would be easy to add one.

Here you go! Thanks for the suggestion.