Minimally synonyms and antonyms

I drove and contributed minimally to the conversation.

With minimally delayed drum loops setting the stage, the duo weaves an organic web of various acoustic instruments on top.

As an established minimally invasive technique, sentinel node biopsy is a very accurate means of staging the axilla for early breast cancer.

Out of a Coma, Into a Twilight Accident victim Robert Wendland is " minimally conscious.

In particular, how are we to understand the notion of a ' minimally decent life '?