What would the “calisthenics diet” be if there were one?
People don’t get into bodyweight fitness just because they can. Most peoples’ default course of action to get healthy is to join a gym.
You’re different. You are a Bodyweight fitness fanatic because it is a way of gaining control.
Bodyweight fitness enables you to develop a healthy body without investing in tons of heavy bodybuilding equipment and spending on gym memberships.
Using your own body weight is simple and natural. Shouldn’t your diet follow the same principles?