1. record-csi-udp.py stamped LOCAL time with a 'Z' (UTC) suffix → camera/CSI disagreed
by the UTC offset → 0 aligned pairs. Now writes true UTC via datetime.now(timezone.utc).
2. align-ground-truth.js kept empty-keypoint (non-detection) records at confidence 0,
collapsing window avgConf below threshold → all windows rejected. Now skipped at load.
3. extractCsiMatrix silently zero-padded/truncated mixed-subcarrier frames. Now frames
are filtered to the session's modal subcarrier count before windowing — never padded.
4. CSI/feature matrices are filled frame-major but were labeled shape [nSc, nFrames] —
transposed. Labels corrected to [nFrames, nSc] / [nFrames, dim].
Co-Authored-By: claude-flow <ruv@ruv.net>
- Add activation clamping [-10, 10] in TCN forward pass to prevent NaN
from real CSI amplitude ranges after normalization
- Add safe sigmoid with input clamping [-20, 20]
- Add scripts/record-csi-udp.py: lightweight ESP32 CSI UDP recorder
Validated on real paired data (345 samples):
ESP32 CSI: 7,000 frames at 23fps from COM8
Mac camera: 6,470 frames at 22fps via MediaPipe
PCK@20: 92.8% | Eval loss: 0.083 | Bone loss: 0.008
Co-Authored-By: claude-flow <ruv@ruv.net>
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