Use case · Vercel AI SDK
Human-in-the-loop approvals for the Vercel AI SDK
Building agents with the Vercel AI SDK? Gate the tools that do irreversible things. Call gate.require() inside a tool's execute function and the agent waits for a human approval before acting, with a tamper-evident audit trail for every decision.
execute: async ({ amount, to }) => {
await gate.require("payments.transfer", { amount, to });
}Where it fits
- ›Gate a tool's execute() behind human sign-off
- ›Require approval only above a policy threshold
- ›Ship agentic features with a verifiable approval record
Frequently asked questions
How do I add human-in-the-loop to Vercel AI SDK tools?+
Call gate.require() at the top of a tool's execute function. The tool call blocks until a human approves in Slack or the console, then proceeds — or fails closed on reject or timeout — while the AI SDK's streaming and orchestration stay unchanged.
Does it work with generateText, streamText, and agents?+
Yes. Seal lives inside the tool's execute function, so it applies wherever the AI SDK invokes tools — generateText, streamText, or a multi-step agent loop.