Split train and tool simulator modules; mastery curriculum and grader workflow nudge.

feat: default GRPO/eval to Qwen/Qwen3-1.7B + LoRA; disable Qwen3 thinking in chat template

Update notebooks and proof artifact tooling

Use SVG reward curve for HF Space Git (reject binary PNG)

Add DriftShield proof artifacts and generator script

Harden training parser and validation workflow

Rename files to DriftShield: notebooks, server module, kernel folder

Add Kaggle training notebook, kernel metadata, and push script

fix: align inference.py env vars with spec and clean up repo

fix: match mandatory stdout format from hackathon spec

clean rewrite: shorter vars, no comments, same logic