The runaway breaker is one layer. UBAG is the deterministic authorization gate for everything an agent does the model proposes, the gate decides, with no LLM in the decision.
◆ Prompt-injection & intent gate
A hijacked agent manipulated by a poisoned document, tool result, or webhook can't move money or leak data. The gate inspects intent (lexical + semantic, dual-provider failover) and fails closed on high-value calls it can't verify.
◆ Blind-agent credential vault
The agent never holds your real keys. Secrets are injected server-side only on an explicit ALLOW so a compromised agent has nothing to exfiltrate and no credential to leak. Patent-pending.
◆ Behavioral authorization
Every action is scored against the account's own baseline plus hard allow-lists and value ceilings. Oversized, off-policy, or out-of-pattern calls are denied before they execute not flagged after the damage.
The model proposes. The gateway decides.
This is a deterministic simulation of UBAG's runaway / token-burn circuit breaker, recreating a real, publicly-reported June 2026 incident. It illustrates the mechanism it is not connected to a live customer system. Numbers for the unchecked case are from the public report.