Summary

Add feature extraction for commit-level defect prediction matching org-intel's 8-dimensional feature vector.

Feature Vector

pub struct CommitFeatures {
    pub defect_category: u8,
    pub files_changed: f32,
    pub lines_added: f32,
    pub lines_deleted: f32,
    pub complexity_delta: f32,
    pub timestamp: f64,
    pub hour_of_day: u8,
    pub day_of_week: u8,
}

Requirements

• Extract features from git diff/commit metadata
• Normalize features for ML pipeline
• Support batch extraction

References

• D'Ambros et al. (2012) defect prediction benchmark
• org-intel CommitFeatures struct