Platform capabilities and published control surfaces reflect public documentation as of August 2026 and are moving quickly; the absence of a documented control is a finding about disclosure, not proof that no control exists internally. The constraint compiler and specification are reference designs for discussion — not production risk software, not audited, and not a substitute for a firm’s own pre-trade controls or its obligations under Rule 15c3-5. Nothing here is a recommendation for or against any broker or platform, and the regulatory discussion is not legal advice. Research and education, not investment advice.