workload_class_below_floor
HTTP 422§9.10 Agreements
The plan selected at PATCH /v1/onboarding sits below the class the compliance screen established for this applicant. A class is a ceiling (CANON 123), so buying up is allowed and buying below the screen's verdict is not. The wizard disables those options; this is what makes it a control rather than decoration.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/workload_class_below_floor",
"title": "…",
"status": 422,
"detail": "…",
"instance": "/v1/…"
}