# Phase 16 Implementation Guide

## Overview
Explainable AI & Interpretability

## Architecture

### Components
- **Implementation Module**: `code/implementation.py`
- **Tests**: `tests/test_phase16.py`
- **State Tracking**: `.state/phase_state.json`

### Guardrails Integration
All AI operations in this phase must use the guardrails system:

```python
from multi_layer_system import MultiLayerGuardrailSystem

guardrails = MultiLayerGuardrailSystem()
validated_input = guardrails.validate(user_input)
```

### Tracker Integration
Update phase state after completing tasks:

```python
import json

with open('.state/phase_state.json', 'r') as f:
    state = json.load(f)

state['status'] = 'IN_PROGRESS'
state['current_task'] = 'Task description'

with open('.state/phase_state.json', 'w') as f:
    json.dump(state, f, indent=2)
```

## Implementation Steps

1. **Review Requirements**
   - Check `README.md` for phase overview
   - Review `.tracker/phase_manifest.json` for detailed user stories
   
2. **Set Up Environment**
   - Ensure guardrails are accessible
   - Set up any phase-specific dependencies
   
3. **Implement Core Logic**
   - Start with `code/implementation.py`
   - Apply guardrails to all AI operations
   - Update state tracking as you progress
   
4. **Write Tests**
   - Unit tests in `tests/test_phase16.py`
   - Integration tests as needed
   - Achieve >80% code coverage
   
5. **Documentation**
   - API documentation
   - Usage examples
   - Known issues and limitations

## Testing

Run tests:
```bash
cd tests
python3 test_phase16.py
```

## Deployment

After completing implementation:
1. Update phase state to 'COMPLETED'
2. Update main tracker: `../../.tracker/state.json`
3. Run validation: `../../comprehensive_sp_validation.py`
4. Document lessons learned

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**Last Updated:** 2025-10-27
