Genkit preview Agents API

Google Genkit added a preview Agents API for TypeScript and Go that bundles message history, tool loops, streaming, persistence, and frontend protocol support. Why it matters: Product prototypes often spend more time on chat plumbing than model choice. A packaged agent interface can reduce boilerplate if the preview matures.

Try this: Evaluate it on a throwaway prototype that needs tools, streaming, and persisted chat state; avoid treating preview APIs as stable infrastructure.