[cschanhniem]

Summary

• PredictionDriftEntry: 15 fields tracking mean/std score shifts between reference and evaluation batches
• 8 validation rules: monitor_id prefix, batch id uniqueness, score bounds, std non-negative, shift magnitude consistency, population >= 1, notes length, notes required when drift_flag=True
• 4 warning conditions: unreported large shift, small populations, variance explosion
• 68 tests; BASELINE 4549→4617
• CLI: openamp-foundry prediction-drift-check

Test plan

• make agent-check passes
• pytest tests/evidence/test_prediction_drift_monitor.py passes (68 tests)
• BASELINE updated 4549→4617