STACK

A proprietary agent-security runtime from STACK AI Security AB in Stockholm. It provides scoped Passports, a credential proxy, policy constraints, audit logs, and security events around connected services. This recipe verifies Tomi Lupsakko's MIT-licensed example runner offline; it does not independently attest the hosted control plane or a live GitHub denial. STACK also operates a paid skills marketplace, so assess that adjacent commercial offering separately from this security workflow.