I am not sure how the information in your links contributes to your belief that volunteering a few hours each week will jeopardize my claim.

How can you volunteer on a regular basis, with a depression? Do you really know when you will feel well enough to be on a schedule?
If you can be on a schedule you condition has improved and you are no longer disabled.

I am talking here about a mental health flareup or decompensation.

When your psychiatrist/ psychologist describes your mental health problem; they have to use SSA terms.
https://secure.ssa.gov/apps10/poms.n...2!opendocument

I want to wish you good luck with your case.