16 total. The intl entries need real egress (usually blocked on this
host) but cost only 10s each with the idle watchdog on networks that
have them. Also noted: a 10s watchdog can kill sources mid slow
negotiation (rat.dev emitted 'Pulling fs layer' then went quiet) --
EVALHARNESS_PULL_IDLE_S=30 softens that.
Co-Authored-By: Claude <noreply@anthropic.com>