Model credentials no longer enter the sandboxAn isolated environment where AI-generated code or agent actions run without being able to touch anything real.Full definition →, shrinking the exposure surface of agents that run code. You also gain mid-turn steering, schema output, tool filtering and resumable sessions.
Terms in this piece · Glossary
agent harness — The scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.
sandbox — An isolated environment where AI-generated code or agent actions run without being able to touch anything real.
structured output — Forcing a model's response to match a schema, so downstream code can parse it instead of guessing at prose.
