AI Agent Skills

Diagnose and fix slow pyfixest regression GRIDS (many feols/fepois calls run sequentially) that stay slow despite demeaner_backend="cupy64" and an idle GPU. Use when: (1…

Plugin shim for mathmodel-studio. Use when Codex invokes the math modeling plugin for CUMCM 国赛, 中国研究生数学建模竞赛（华为杯）, 华数杯, MCM/ICM, Diangong Cup, APMCM, 建模, 相似题或子问检索, Stage…

Combinatorial Purged CV generates a distribution of backtest paths instead of a single estimate. Use when quantifying strategy robustness and overfitting probability.

Build an evidence-linked Excel comparison of CNKI empirical papers, including samples, variable measurement, identification, robustness and mechanisms; distinguish abstr…

Test strategy robustness to parameter variation and detect overfitting cliffs. Use when validating that performance is stable across parameter perturbations.