# API Doc Entity

### Scope

- **Purpose**: Document the public macro API — signatures, behavior, and guarantees.
- **Responsibility**: Registry and overview of all API doc instances.
- **In Scope**: All variadic constructor macros (9 strict + 9 into); collection type re-exports.
- **Out of Scope**: Behavioral invariants (see `invariant/`), feature guides (see `feature/`).

### Overview Table

| ID | Name | Purpose | Status |
|----|------|---------|--------|
| 001 | [Collection Constructor Macros](001_collection_macros.md) | Variadic macros for creating standard collections | ✅ |
