Per PropTech Security: vendor management. Requirements include (a) Vendor and Integrator Security Requirements in contracts + (b) security assessment + onboarding + (c) ongoing oversight + audit rights + (d) supply chain security including SBOM + provenance + (e) maintain inventory of vendors + integrators + (f) cooperate on incident response.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.