A cold Windows runner's first launch of 4.6.3 took longer than 12
seconds to show its window, failing the gate before the candidate was
even installed. The same gate runs before every desktop release, so a
flake there blocks shipping. Each launch still has to stay alive the
whole time and respond.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>