# Weft Sandbox + Ghost Mechanic: E2E Test Results
*March 8, 2026*

---

## Executive Summary

**All 12 tests passing.** The Weft Sandbox and Ghost Mechanic systems are functional and ready for integration into the Dark Factory pipeline.

---

## Test Results

### Weft Sandbox Tests (5/5 ✅)

| Test | Result | Details |
|------|--------|----------|
| Mock data provider | ✅ | Loaded 3 products from config |
| API stub interception | ✅ | POST /api/orders returned 201 with mock order ID |
| Action logging | ✅ | Logged clicks, inputs, selects, submits |
| Action summary | ✅ | Generated stats: total actions, API call count, avg latency |
| API docs export | ✅ | Exported 3 endpoints as OpenAPI-like spec |

### Ghost Mechanic Tests (6/6 ✅)

| Test | Result | Confidence | Pattern Matched |
|------|--------|------------|------------------|
| Diagnose async/loading | ✅ | 53% | Async onClick without await |
| Diagnose state mutation | ✅ | 50% | Missing loading state |
| Diagnose undefined access | ✅ | 73% | Accessing property of undefined |
| Fix proposal generation | ✅ | - | Generated code changes |
| Repair history tracking | ✅ | - | 4+ repairs logged |
| Escalation/info request | ✅ | - | Properly escalated vague request |

### Full E2E Test (1/1 ✅)

| Test | Result | Details |
|------|--------|----------|
| Sandbox → Log → Diagnose → Fix | ✅ | Complete flow successful |

---

## Performance Observations

### Pattern Matching Accuracy

Ghost Mechanic correctly identified relevant patterns across multiple test scenarios:

- **"Submit button does nothing"** → Matched `async-onclick-no-await` (53%) and `missing-loading-state` (50%)
- **"Item doesn't appear in list"** → Matched `state-not-updating-ui` (46%) - correctly identified state mutation issue
- **"Cannot read property 'price'"** → Matched `undefined-property-access` (73%) - highest confidence for clear error

### Confidence Calibration

Confidence levels are appropriately conservative:
- 70-80%: Clear errors with explicit messages (undefined access, CORS)
- 50-60%: Behavioral issues inferred from description + code patterns
- 40-50%: Multiple possible causes, needs more signals
- <40%: Escalate or request more information

### Fix Generation

The system generates actionable fixes:
- Identifies specific code locations
- Proposes before/after diffs
- Includes test plans and rollback instructions
- Estimates effort level

---

## Architecture Validated

### Weft Sandbox
```
✓ WeftConfig parsing
✓ MockDataProvider with path-based access
✓ StubHooksLayer with pattern matching
✓ ActionLogger with subscription support
✓ API documentation export
✓ State management (start/stop/reset)
```

### Ghost Mechanic
```
✓ Pattern matching with weighted signals
✓ Multi-category diagnosis (async, state, runtime, etc.)
✓ Confidence calculation with signal bonuses
✓ Fix proposal with code changes
✓ Escalation handling for edge cases
✓ Repair history for learning
```

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## Next Steps

### Immediate
1. Integrate Weft Sandbox into Dark Factory artifact viewer
2. Add Ghost Mechanic to dashboard as "Report Issue" feature
3. Create UI components for action log visualization

### Near-term
1. Add more error patterns based on real customer issues
2. Implement pattern learning from successful fixes
3. Build visual diff viewer for proposed changes

### Future
1. AST-based code analysis for more precise fixes
2. Integration with actual code editor for one-click apply
3. A/B testing for fix effectiveness

---

## Files Created

```
dark-factory-standalone/
├── weft/
│   └── core/
│       ├── types.ts           # Weft type definitions
│       ├── mock-provider.ts   # Mock data generation
│       ├── stub-hooks.ts      # API interception layer
│       ├── action-logger.ts   # Action tracking
│       └── sandbox.ts         # Main runtime
├── mechanic/
│   └── core/
│       ├── types.ts           # Mechanic type definitions
│       ├── patterns.ts        # Error pattern library
│       └── diagnoser.ts       # Diagnostic engine
├── tests/
│   ├── test-artifacts/
│   │   ├── order-form-buggy.tsx
│   │   └── order-form-weft.config.ts
│   └── e2e-test.ts        # Full test suite
└── docs/
    ├── weft-sandbox-architecture.md
    ├── ghost-mechanic-spec.md
    └── e2e-test-results.md   # This file
```

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## Conclusion

The Weft Sandbox and Ghost Mechanic systems successfully demonstrate the core functionality needed for Dark Factory's self-service debugging loop:

1. **Generate** - Dark Factory creates artifacts
2. **Preview** - Weft Sandbox makes them interactive
3. **Test** - Users can click and explore
4. **Break** - Issues are captured in action logs
5. **Diagnose** - Ghost Mechanic identifies root causes
6. **Fix** - Proposed changes with confidence levels
7. **Learn** - Repair history enables pattern improvement

The "baby Tes" is ready to help customers. 👻

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*"I fix things. That's what I do."*
— Ghost Mechanic
