Agent API

PrepareStep trim messages

Shrink growing agent history before each step. This demo pre-loads a long conversation so trimming is visible on the first run.

24 seeded messages~394 est. tokens

This demo ships a long conversation so you see prepareStep trim on the first click—no manual multi-turn setup.

Also run without trim (2× API calls)

Threshold: 10 messages → keep last 6

PrepareStep: Trim Message History | AI SDK Agents