Three full windowed runs showed 10x-100x per-trial score variance: a single
stray desktop frame >100 ms (compositor/GC hiccup) instantly zeroed trials
whose held p95 was 6-9 ms. Require 3 over-cap samples in a hold window before
bailing -- a truly overloaded engine trips that within ~50 ms of wall time,
while lone hiccups now just count toward the window's p95. Documented as
DESIGN.md deviations 8 and 9.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
John McCardle
1aa6624758