# Catalog Contract Catalog

## Package

- `BuildingBlock.Catalog.Contracts`

## Contract Groups

- `Products`: product contract shapes.
- `Tags`: tag, tag type, and tag override contract shapes.
- `Abstractions`: marker abstraction for contract ownership.

## Ownership Boundary

- This repository owns reusable catalog capability contracts.
- Persistence and transport concerns remain outside this package.
- Identity abstractions remain Thalos-owned.