permissions can now return "triage_plus"

What changed

Producer-side tools call this additive. It breaks exhaustive switches, strict parsers and generated client enums.

Affects permissions on repository-invitation reachable from 4 operations.

New value: triage_plus.

can now return "triage_plus"

Who is affected

Code that reads GitHub's repository-invitation objects, used by 4 GitHub operations.

Before and after

Code that breaks

switch (response.permissions) {
  // existing branches …
  // no branch for "triage_plus"
  default:
    throw new Error("unexpected permissions");
}

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