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AstrAI/scripts/tools
ViperEkura d6bfb09863 feat: add grad_snr metric with EMA-based gradient SNR tracking
- add GradSNRTracker to metric_util.py computing SNR = E[g]^2 / Var(g) via per-parameter EMA moments
- add grad_snr_tracker field to TrainContext (instantiated by default)
- register grad_snr in MetricCallback, update tracker on each optimizer step before metrics are recorded
- add grad_snr to default --metrics in train.py CLI
2026-08-01 08:54:44 +08:00
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