# Hotfix Implementation Complete

**Date:** 2025-12-04
**Status:** ✅ HOTFIX IMPLEMENTED IN CORRECT LOCATION

---

## Summary

**Problem Identified:**
- Hotfix was implemented in Risk Scorer, but Kids Policy detects UNSAFE_TOPIC independently
- TopicRouter classifies "how to" and "explain how" as "unsafe" keywords
- Kids Policy blocks BEFORE Risk Scorer runs

**Solution Implemented:**
- Moved hotfix to Kids Policy (`kids_policy/firewall_engine_v2.py`)
- Filter applied BEFORE UNSAFE_TOPIC blocking decision
- Overrides unsafe classification for benign educational queries

---

## Implementation Details

### File Modified
- `kids_policy/firewall_engine_v2.py`

### Changes
1. **Added Function:** `_is_benign_educational_query()` (lines 28-110)
   - Whitelist for 15+ harmless educational topics
   - Pattern matching for "Explain how..." and "How to improve..."
   - Dangerous keyword filtering

2. **Integrated Filter:** Before UNSAFE_TOPIC blocking (line 405)
   - Checks if query is benign educational content
   - Overrides unsafe classification if benign
   - Continues to semantic analysis instead of blocking

### Code Location
```python
# Line 400-414: UNSAFE topic detection
if topic_from_router == "unsafe":
    # HOTFIX: Check for benign educational queries BEFORE blocking
    if _is_benign_educational_query(clean_text):
        # Allow benign educational content - override unsafe classification
        topic_from_router = "general_chat"
        detected_topic = None
    else:
        # Continue with normal unsafe topic blocking...
```

---

## Quick Test Results

**Test:** 11 false positives
**Result:**
- ✅ 3/11 allowed (27%)
- ⚠️ 8/11 blocked by Cumulative Risk (SessionMonitor), not UNSAFE_TOPIC

**Interpretation:**
- UNSAFE_TOPIC blocking successfully bypassed ✅
- SessionMonitor blocks items in same session due to accumulated risk
- Full evaluation needed with fresh sessions

---

## Full Evaluation Running

**Command:**
```bash
python scripts/run_answerpolicy_experiment.py \
    --policy kids \
    --input datasets/core_suite.jsonl \
    --output logs/evaluation_post_fix_kids_v2.jsonl \
    --use-answer-policy \
    --num-workers 18
```

**Expected Duration:** ~1 hour
**Expected Result:** FPR reduction from 22% to ~5%

---

## Files Modified

1. ✅ `kids_policy/firewall_engine_v2.py` - Hotfix implemented
2. ✅ `src/llm_firewall/risk/risk_scorer.py` - Original hotfix (kept as backup)
3. ✅ `test_kids_policy_hotfix.py` - Quick test script

---

## Next Steps

1. **Wait for evaluation to complete** (~1 hour)
2. **Analyze results:** Calculate FPR and ASR
3. **Compare with baseline:** Verify improvement
4. **Make deployment decision:** Follow decision framework

---

**Status:** ✅ **HOTFIX IMPLEMENTED - EVALUATION RUNNING**
