# Appendix: Key Statistics

## Babylon Project Metrics

| Metric | Value |
|--------|-------|
| Total commits | 531 |
| AI-assisted commits | 151 (28.4%) |
| Production code lines | 16,154 |
| Test code lines | 28,231 |
| Test:code ratio | 1.7:1 |
| Test functions | 1,444 |
| Test files | 73 |
| Architecture Decision Records | 20+ |
| Design documents | 28 |
| YAML specification files | 25+ |
| Development timespan | 1 year |
| Intense burst (Dec 7-11, 2025) | 140 commits |
| Sessions recorded | 100+ |

## The Discipline Stack

| Layer | Tool | Purpose |
|-------|------|---------|
| Linting | Ruff | Style, bugs, complexity |
| Types | MyPy (strict) | Type contracts |
| Tests | Pytest | Behavioral verification |
| Commits | Commitizen | Message format |
| Docs | Sphinx | API documentation |
| Decisions | ADRs | Architectural rationale |
| Memory | claude-mem | Session continuity |

## Commit Message Sample (Dec 11, 2025)

```
feat(engine): add Carceral Geography to TerritorySystem (Sprint 3.7)
refactor(models): replace IdeologicalComponent with George Jackson Model
docs(ai-docs): add observer-layer.yaml with Bondi Algorithm aesthetic
feat(observer): add TopologyMonitor for condensation detection (Sprint 3.1)
docs(readme): rewrite for accuracy and truthfulness
chore: update .gitignore for assets and results
```

## Development Phase Timeline

| Phase | Period | Commits | Focus |
|-------|--------|---------|-------|
| 1 | Nov 30 - Dec 3, 2024 | 310 | Foundation, scaffolding |
| 2 | Dec 4-16, 2024 | 87 | Feature development |
| 3 | Dec 17, 2024 - Dec 6, 2025 | 4 | Dormancy |
| 4 | Dec 7-11, 2025 | 140 | Major revival burst |

## AI-Assisted Commit Distribution

### High AI Assistance (>50%)

- Documentation generation
- Test boilerplate
- Infrastructure/tooling
- Type annotations
- Formatting/linting fixes

### Low AI Assistance (<20%)

- Core algorithm design
- Architecture decisions
- Bug fixes in game logic
- Mathematical formula implementation

## Tools Used

| Category | Tool | Purpose |
|----------|------|---------|
| AI Primary | Claude Code | Main development assistant |
| AI Secondary | Aider | Alternative AI coding |
| AI Experimental | Devin AI | Autonomous agent testing |
| AI Legacy | GitHub Copilot | Inline completions |
| Memory | claude-mem | Cross-session persistence |
| Types | Pydantic + MyPy | Validation + checking |
| Testing | Pytest | Test framework |
| Linting | Ruff | Style enforcement |
| Docs | Sphinx + MyST | Documentation system |
| VCS | Git + Commitizen | Version control |