# Feature Doc Entity
### Scope
- **Purpose**: Documents user-facing features of `test_tools` as navigational hubs collecting all artifacts.
- **Responsibility**: Index of all feature doc instances with cross-references to source, tests, and design.
- **In Scope**: Implemented features with committed source and tests.
- **Out of Scope**: Individual API reference; invariants are in `docs/invariant/`.
### Overview Table
| 001 | [Test Aggregation Facade](001_test_aggregation_facade.md) | Single-dependency access to all testing utilities | ✅ |
| 002 | [SmokeModuleTest](002_smoke_module_test.md) | Isolated temporary cargo project testing | ✅ |