Claude Skills by mospira

Audits time-based machine learning backtests, walk-forward validation, rolling retraining, forecasting evaluations, and temporal train/test pipelines for data leakage, faulty split logic, invalid feature timing, target leakage, calibration/tuning leakage, and misleading experiment comparisons. Use when agent needs to review or change walk-forward code, time-series ML experiments, trading backtests, forecasting notebooks, rolling CV logic, or any model evaluation where past-to-future chronolog...