Update README.md

README.md

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----
-license: mit
----
+---
+license: mit
+language:
+- en
+task_categories:
+- text-classification
+tags:
+- clarus
+- clinical
+- quad-coupling
+- population-shift
+- protocol-deviation
+- site-variance
+- endpoint-fragility
+pretty_name: Clinical Quad Population Shift Protocol Deviation Site Variance Endpoint Fragility v0.2
+---
+
+Clinical Quad Population Shift Protocol Deviation Site Variance Endpoint Fragility v0.2
+
+What this dataset does
+
+It tests whether a model can detect when clinical trial endpoints lose credibility under quad coupling.
+
+Quad nodes
+
+- population_shift  
+- protocol_deviation_rate  
+- site_variance_level  
+- endpoint_fragility  
+
+Labels
+
+0 coherent  
+- Stable population  
+- Low deviations  
+- Low site variance  
+- Endpoint robust  
+
+1 tradeoff  
+- Some drift exists  
+- Endpoint still usable  
+- Risk is present but not terminal  
+
+2 collapse  
+- Endpoint credibility breaks  
+- Drift becomes structural  
+- Site or deviation pressure overwhelms interpretation  
+
+What changed in v0.2
+
+- Version bumped to make scorer changes visible  
+- New scorer with validation and id-based matching  
+- Confusion and error sampling added  
+- Risk score and rule_pred diagnostics added  
+
+Files
+
+data/train.csv  
+data/test.csv  
+scorer.py  
+
+Run scoring
+
+python scorer.py --preds_csv predictions.csv --gold_csv data/test.csv