reports/feature_selection.md

# Feature Selection — MuleGuard

- Full feature space after preprocessing: **3879** columns
- Selected for modeling: **103**
- Includes the fused **anomaly_score** (Isolation Forest) and retained domain priors.

## Top selected features by CV selection frequency

| Feature | Selection freq | Domain prior? |
|---|---|---|
| anomaly_score | 1.00 | ✅ |
| F3908 | 1.00 |  |
| F3811 | 1.00 |  |
| F3493 | 1.00 |  |
| F3898 | 1.00 |  |
| F3805 | 1.00 |  |
| F2637 | 1.00 |  |
| F1921 | 0.90 |  |
| F270 | 0.90 |  |
| F3801 | 0.90 |  |
| F2489 | 0.90 |  |
| F3484 | 0.90 |  |
| F3914 | 0.80 |  |
| F3804 | 0.80 |  |
| F3831 | 0.80 |  |
| F1819 | 0.80 |  |
| F3872 | 0.80 |  |
| F3873 | 0.80 |  |
| F1597 | 0.80 |  |
| F1813 | 0.80 |  |
| F3799 | 0.70 |  |
| F3806 | 0.70 |  |
| F3810 | 0.70 |  |
| F3499 | 0.70 |  |
| F3748 | 0.70 |  |
| F3813 | 0.70 |  |
| F3105 | 0.70 |  |
| F114 | 0.70 |  |
| F2486 | 0.70 |  |
| F3825 | 0.70 |  |
| F3907 | 0.70 |  |
| F3922 | 0.70 |  |
| F156 | 0.70 |  |
| F2344 | 0.70 |  |
| F2182 | 0.70 |  |
| F3535 | 0.60 |  |
| F3532 | 0.60 |  |
| F421 | 0.60 |  |
| F3526 | 0.60 |  |
| F3913 | 0.60 |  |
| F1602 | 0.60 |  |
| F3894 | 0.60 | ✅ |
| F1821 | 0.60 |  |
| F3812 | 0.60 |  |
| F3753 | 0.60 |  |
| F3751 | 0.60 |  |
| F2638 | 0.50 |  |
| F949 | 0.50 |  |
| F1814 | 0.50 |  |
| F3055 | 0.50 |  |
| F3537 | 0.50 |  |
| F364 | 0.50 |  |
| F2581 | 0.50 |  |
| F3798 | 0.50 |  |
| F2543 | 0.40 |  |
| F2949 | 0.40 |  |
| F1166 | 0.40 |  |
| F2076 | 0.40 |  |
| F3800 | 0.40 |  |
| F1057 | 0.40 |  |
| F3640 | 0.40 |  |
| F2737 | 0.40 | ✅ |
| F3056 | 0.40 |  |
| F950 | 0.40 |  |
| F3919 | 0.40 |  |
| F1815 | 0.40 |  |
| F64 | 0.40 |  |
| F267 | 0.40 |  |
| F3920 | 0.40 |  |
| F2293 | 0.40 |  |
| F422 | 0.40 |  |
| F2350 | 0.40 |  |
| F3807 | 0.40 |  |
| F2891 | 0.40 |  |
| F3871 | 0.30 |  |
| F3817 | 0.30 |  |
| F3819 | 0.30 |  |
| F1825 | 0.30 |  |
| F1812 | 0.30 |  |
| F1863 | 0.30 |  |
| F115 | 0.00 | ✅ |
| F1692 | 0.00 | ✅ |
| F2082 | 0.00 | ✅ |
| F2122 | 0.00 | ✅ |
| F2582 | 0.10 | ✅ |
| F2678 | 0.10 | ✅ |
| F2956 | 0.00 | ✅ |
| F3043 | 0.20 | ✅ |
| F321 | 0.20 | ✅ |
| F3836 | 0.00 | ✅ |
| F3887 | 0.00 | ✅ |
| F3888_age_days | 0.00 | ✅ |
| F3889_recency_ord | 0.00 | ✅ |
| F3891_agriculture | 0.00 | ✅ |
| F3891_housewife | 0.00 | ✅ |
| F3891_others | 0.00 | ✅ |
| F3891_retired | 0.00 | ✅ |
| F3891_salaried | 0.00 | ✅ |
| F3891_selfemployed | 0.00 | ✅ |
| F3891_student | 0.00 | ✅ |
| F527 | 0.00 | ✅ |
| F531 | 0.00 | ✅ |
| F670 | 0.00 | ✅ |