diff --git a/todo_refactor.txt b/todo_refactor.txt
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+
+Add unit test for all options and bifurcations
+
+Revisit the classifier_helper
+
+Opciones
+typeexampleinit
+kFCVint10y
+heldoutfloat0.6y
+sampletupleX,yn
+
+init:
+kFCV:Q(val_split=10, random_seed=None)
+held:Q(val_split=0.7, random_seed=None)
+sample:--
+
+the classifier is not fit:
+fit end-to-end (classification->predictions->aggregation):
+kFCVfit(X, y, val_split=10)
+heldfit(X, y, val_split=0.7) 
+samplefit(X, y, val_split=(X,y))
+
+the classifier is fit:
+fit only aggregation (predictions->aggregation):
+samplefit_aggregation(X, y, transform_X=True)
+
+fit only aggregation (aggregation):
+samplefit_aggregation(P, y, transform_X=False)
+
+
+ 
+
+