F1: resetting the count on each refused write hid a battery that really refuses behind a link refusing 1 write in 3 (never learned; learned at 358 s with the count kept). F2: a board at 0 W before its link is stale learned no refusal untested (mutation R7 survived); now a 1 s-lag case. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>