tests/README.md

# tests/

Test suites grouped by responsibility.

- API: `test_api.py`
- Environment core: `test_env.py`, `test_tasks.py`, `test_graders.py`
- Models: `test_models.py`
- RL wrappers/features: `test_feature_builder.py`, `test_action_mask.py`, `test_gym_wrapper.py`, `test_curriculum.py`
- Recurrent RL helpers: `test_rl_evaluate.py`
- Baseline reproducibility: `test_baseline_repro.py`