The port is in; the portable (windows-latest) job no longer hides behind continue-on-error. Its first run is the first run of every Windows arm (see docs/testing.md "P11c"), so the EM should watch that run before merging. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HS8WZziDnyxunC23MUxrLp