Your AI agents pass every test you wrote. Your system still fails in production. Here's the gap nobody's testing.

swarm-test detecting an injection surface You test your agents. Prompt evals, output scoring, regression sets — each agent, individually, has never been more thoroughly checked. And yet multi-agent systems keep breaking in production, in ways no eval predicted. The reason is uncomfortable: the failures don't live in the agents. They live in the wiring between them. One failure most teams have never checked for An agent calls a tool — a web search, a document fetch, an API. The tool returns a…