Keep your UI in sync

Your UI updates the moment the assistant changes data

When the AI modifies data through tool calls, your UI should update. The useYakToolEvent hook lets you subscribe to tool completions and invalidate caches—your page refreshes automatically after chatbot actions.

Read the docs

Works withChat onlyAll SDKstRPC / GraphQL / RESTReact Query & SWR

Cache invalidation

useYakToolEvent((event) => {

if (event.ok) {

utils.orders.invalidate();

}

});

Works with tRPC, React Query, SWR

What you get

Subscribe to tool call completion events
Access tool name, args, result, and success status
Integrate with tRPC, React Query, or SWR cache invalidation
Auto-unsubscribe when components unmount
Keep data fresh without manual refresh

How it works

Subscribe where the data lives

Call useYakToolEvent inside any component under YakProvider (or onToolCallComplete on YakClient for non-React apps) and react to the tools you care about by matching event.name.

The assistant runs a tool

When a chat tool call resolves, Yak routes it through your single onToolCall funnel—host functions, tRPC, GraphQL, and REST alike—then fires the completion event with name, args, ok, and result or error.

Your UI refreshes itself

Your handler invalidates the relevant tRPC, React Query, or SWR cache so the affected page re-fetches, and the subscription tears down automatically when the component unmounts.