Arcjet secures the actions AI agents take in production. Over the last year, agents have gone from answering questions to moving money, changing records, and shipping code, and the security or engineering leader now owns that risk while the product team hand-rolls its own controls. The catch: identity and RBAC authenticate the agent but don't govern the action it's about to take, and network proxies can't see inside the workflow. Arcjet is a lightweight library that runs inside the application code and gives security teams a set controls over every agent: visibility into what each agent is doing, real-time enforcement before a consequential action (prompt injection, PII, tool authorization), and an audit trail.