The CBRAIN Boutiques integrator supports a set of special flags in the `"custom"` field of the descriptor. Document them all somewhere? At the top of my head: ```json "custom": { "cbrain:author": "descriptor author", "cbrain:inherits-from-class": "ClassName", "cbrain:can-submit-new-tasks": truefalse, "cbrain:ignore-exit-status": truefalse, "cbrain:ignore_outputs": [id, id, id], "cbrain:save_back_inputs": [id, id, id], "cbrain:readonly-input-files": truefalse, "cbrain:alters-input-files": truefalse } ```