Layer-1 is DNN-only; predecessor code preserved at git tag cuas-layer1.
Removed: 3d3 coarse-velocity path (curt_3d3_*, rleak1, convolve3D3LReLU);
C5P matched-filter / Bayes-posterior / whitening (curt_c5_matched/en/post/.../white*/from_pix);
LReLU rectification (curt_rleak0/pyr -> linear alpha=1, LoG kept);
distribution-vote (-GVOTE/-GHEADS, voteScatterGrid); curt_dnn_t8frac.
28 dialog params dropped; dialogQuestions/dialogAnswers re-verified aligned (44 widgets = 44 getNext). ~1841 lines removed.
Deprecated (kept): curt_stage2_model, MF-S S convention.
Kept: DNN front-end, recurrent, synth-test, SUBAVG, pyramid, LoG (linear). Build OK.

Runtime-untested (dialog) — verify a run; restore point: tag cuas-layer1.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>