Ask HN: What to put in 'declaration of prior inventions'

I am about to start a new job in California and employer wants me to sign this form. I dont have any patents but my side-projects are in the same domain as in the job. So I am concerned about what to put in there. I also have planned to build something in the coming months on the side. Should I also list that in the 'prior inventions' form? The advice I find on the internet is conflicting. What happens if I list something and the employer tells me to stop working on it even though it is not conflicting?