Algorithm 2: Source-Only Reliability Fitting and External Evaluation

Input: Trained primary diagnostic checkpoint; probability-calibration subset; conformal-calibration subset; source reliability-threshold partition; source test set; PAD-UFES-20.

Output:  Calibrated probabilities, conformal prediction sets, source-fitted selective decisions, and external reliability measurements.

Method: Freeze the trained primary diagnostic checkpoint. Fit probability calibration using only the designated source calibration subset. Apply the fixed calibration parameters to the independent conformal-calibration subset. Estimate class-conditional conformal thresholds using this subset only. Apply the fixed calibration and conformal pipeline to the source reliability-threshold partition. Compute calibrated-confidence risk, predictive entropy, logit-derived energy, and conformal-set size. Fit the source selective-classification rule and freeze all scaling parameters and decision thresholds. Apply the complete fixed pipeline to the source test set and PAD-UFES-20 without adaptation. Report discrimination, calibration, conformal, uncertainty-based error-detection, and selective-classification performance. Perform DDI OOD and explanation-stability analyses separately using the prespecified fixed audit checkpoint. Constraint: PAD-UFES-20 and DDI results are not used to modify the diagnostic model, calibration parameters, conformal predictor, or selective-classification thresholds.