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ml-data-leakage-guard

Detects and prevents data leakage in machine learning and mathematical modeling. Use after ML tasks involving data cleaning, feature engineering, data augmentation, algorithm development, normalization, missing value imputation, dimensionality reduction, feature selection, or time series modeling. Checks if features/statistics would be available at prediction time.

bundled/skills/ml-data-leakage-guard/SKILL.md

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# ML Data Leakage Guard Skill

Automatically detects and prevents data leakage in machine learning workflows by verifying that all preprocessing steps, feature engineering, and statistical computations would be available at prediction time.

## When to Use This Skill

Use this skill after work involving:
- Data preprocessing (normalization, standardization, scaling)
- Missing value imputation
- Feature engineering and feature selection
- Dimensionality reduction (PCA, SVD, t-SNE)
- Target encoding or label encoding
- Time series feature construction
- Data augmentation strategies
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