# API Doc Entity
### Scope
- **Purpose**: Document the public interface exposed by mem_tools for contributors reviewing API contracts.
- **Responsibility**: Documents public interface contracts — function signatures, error handling, and compatibility guarantees for all exported comparison functions.
- **In Scope**: Instances covering one logical grouping of public functions each — the memory comparison set.
- **Out of Scope**: Behavioral rationale and implementation design — see feature/ and invariant/ instances.
### Overview Table
| 001 | [Memory Comparison Functions](001_comparison_functions.md) | Formal interface contract for all four exported memory comparison functions. | ✅ |