fsi3_ecsw_offline.rs (env-gated on RTX_ECSW_SNAP; committed default is
a no-op) measures the three pre-registered quantities on the harvested
run-7 flag trajectory, with a numbering self-check (clamped-DOF
displacement exactly 0.0 across all 3,294 snapshots).
Measured: (1) the flapping manifold compresses 560 free DOFs to 12-20
POD modes at ~0.5% held-out rms projection error — the subspace
exists. (2) ECSW has NOTHING TO EXPLOIT on the 70-element flag: the
NNLS residual sits at single-element scale until nearly every element
joins (31 el -> 10%, 51 -> 10%, 67 -> 2.5%, 70 -> 1e-15; held-out ==
training everywhere; cycle-only manifold identical) — each macroscopic
Quad8 carries non-redundant virtual work, so no sub-percent sample
smaller than the mesh exists. (3) full reduced assembly 548 us/eval;
ECSW at best 1.4x at a useless 10% residual.
ReducedNonlinearModel gains assemble_reduced_force (the measured
quantity). The campaign's >=10x structural gate cannot come from
hyperreduction at the validated resolution — recorded in the campaign
doc with the re-scope options.
Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01X2GmJXeQ2njUecEKiJZ1G2
