Each key is the whole value. reviewer is who approves a released entry in a system that takes entries as drafts for approval: null or {mode: "timekeeper"} is each lawyer their own, and {mode: "person", external_ref, name} is one person of the firm's, who must be an ACTIVE employee on this connector's team (422 on reviewer.external_ref otherwise). The system may still refuse that person at the push, which answers connector.reviewer. A system that does not take entries as drafts for approval has no reviewer: any reviewer but null is a 422 on reviewer there, and so it is in a system where the person who released an entry is always its reviewer (capabilities.reviewer is self). A sync never changes the setting. 404 while the firm has no connector. A firm connected to a system this service carries no adapter for answers the not-available 422.

Operator mount: an operator acting for the firm named in the path, as its oldest active admin, else its oldest active billing member; X-Six-Minute-Acting-As names them. 404 for no such firm, 409 urn:six-minute:problem:no-acting-member for one with neither.