Edge computing in Akan means this: one Akan server can call another Akan server with the same generated `fetch` object you already use in the app.

The important part is the last option: `{ url }`. It tells fetch which server should receive the signal call.

Use normal query or mutation calls when the cloud wants the edge server to do something. The call still has typed arguments and typed return values.

Use subscriptions when the edge server keeps sending status. Save the unsubscribe function so you can clean up later.

When you talk to the same edge server many times, make a small class that remembers the URL and unsubscribe functions.

Keep Akan fetch for commands and status. If you need huge video or binary streams, you can add another transport just for that data.