add_label_ids is no longer accepted

What changed

Usually ignored rather than rejected, so the call succeeds and does something subtly different.

Affects add_label_ids on UpdateInboxThreadOptions reachable from 1 operation. Grep for it: nothing else will tell you.

Who is affected

Code that sends Resend's UpdateInboxThreadOptions objects, used by 1 Resend operation.

Before and after

Code that breaks

await client.post("/…", {
  // add_label_ids is now ignored, not rejected
  add_label_ids: value,
});

Based on Resend’s published API specification. How severity is decided.