# Phase 1 Complete: Shadow Mode Framework (TDD)

**Status:** ✅ Complete  
**Timeline:** 2 weeks → 1 day (accelerated)  
**Test Results:** 23/23 passing (100%)

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## TDD Process Followed

### Step 1: RED - Write Failing Tests
**Commit:** `806c5c5`
- Wrote 13 tests defining expected behavior
- Tests imported non-existent modules
- All tests failed as expected

### Step 2: GREEN - Minimal Implementation
**Commit:** `ce24af6`
- Implemented `models.py` with all data classes
- Implemented `decision_logger.py` with SQLite/JSONL support
- Implemented `comparator.py` with agreement logic
- All 13 TDD tests passed

### Step 3: REFACTOR - Add Comprehensive Tests
**Commit:** `1785d32`
- Added 10 additional tests for edge cases
- Added `log_outcome()` method
- Total: 23 tests, all passing

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## Components Delivered

| Component | File | Tests | Status |
|-----------|------|-------|--------|
| Data Models | `models.py` | 4 | ✅ |
| Decision Logger | `decision_logger.py` | 11 | ✅ |
| Comparator | `comparator.py` | 6 | ✅ |
| Demo | `demo_shadow_mode.py` | - | ✅ |

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## Test Coverage

```
tests/unit/shadow/
├── test_decision_logger_tdd.py    (13 tests - TDD foundation)
├── test_comparator.py             (6 tests - agreement logic)
└── test_decision_logger.py        (4 tests - persistence)

Total: 23 tests, 100% passing
```

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## Usage Example

```python
from agent_ros_bridge.shadow import DecisionLogger, DecisionComparator
from agent_ros_bridge.shadow.models import AIProposal, HumanAction

# Initialize
logger = DecisionLogger(db_path="shadow.db")
comparator = DecisionComparator()

# Log AI proposal
logger.log_ai_proposal("bot1", ai_proposal)

# Log human action
logger.log_human_action("bot1", human_action)

# Calculate agreement
metrics = comparator.calculate_metrics(records)
print(f"Agreement rate: {metrics['agreement_rate']:.1%}")
```

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## Next: Phase 2

1. Dashboard - Real-time web UI
2. Integration - Hook into intent parser
3. Deployment - Start shadow mode collection

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*Phase 1 completed using strict TDD principles.*
