The integrator demoted my settled-at-entry guard to a warning at the Sprint-8
merge and handed B+D the redesign. Investigating it refuted the stated cause and
found a better observable.
The ponding diagnosis does not hold: every storm's rain curve starts at [0,0], so
storm_02.rainMmPerHour(0) is 0.0 mm/h and a held clock rains nothing. The real
confound was that the guard measured in the STORM's wind while the rig settled in
CALM — and that calm->storm step is one the REAL GAME ALSO HAS (wind.use() swaps
on the phase change), so it was never a harness artifact. Their 2 s windows were
also shorter than the cloth's breath: 2 s reads a 32% trend on a settled rig
where 3 s reads 6%.
But fixing the clock isn't enough, because LOAD cannot answer this question at
all. In calm there is no transient to see — the unsettled rig is LIGHTER (0.30 kN
vs 0.47 settled) and the trend test passes at every settle length from 0 to 20 s.
A guard that cannot fail is decoration, which is precisely what StumbleBack and
the fake skips were.
So ask the physical question: has the cloth stopped MOVING. Mean node drift
separates ~6x either side, and cannot be confused by wind or water:
unsettled (0 s) -> 212 mm/s (cover quad) · 208 (miss quad)
settled (8-20 s) -> 35 mm/s worst breath, typically 4-6
Limit 100 mm/s. Proved it FAILS before trusting it to pass: sabotaged the settle
to 0 s and it fired — "cloth still drifting 212 mm/s (limit 100)".
The integrator's 600 N floor was a sound amendment to the LOAD design; it isn't
carried over because drift has no units of force and 212-vs-35 is not a judgement
call. 274/0/0, all five balance asserts green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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