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Add _render_training_curves + matplotlib dep + plot deliverables in README
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Training Curves

PNGs in this directory are auto-generated by physix.training.loop._render_training_curves at end of every GRPO run, then mirrored from the HF model repo via physix-train/sync-plots.sh.

Files:

  • loss.png — GRPO surrogate loss over training steps.
  • reward.png — Mean reward (with ±1σ band) over training steps.
  • reward_components.png — Per-component reward (match, match_dense, correctness, simplicity, format).

To regenerate locally after a job:

./physix-train/sync-plots.sh Pratyush-01/physix-3b-rl