# Catalog Contract Catalog

## Package

- `BuildingBlock.Catalog.Contracts`

## Contract Groups

- `Conventions`: transport-neutral request/response and envelope conventions.
- `Products`: transport-neutral product contract shapes.
- `Tags`: transport-neutral tag, tag type, and tag override contract shapes.
- `Abstractions`: marker abstraction for contract ownership.
- `Adapters`: protocol adapter boundaries.
- `Grpc`: gRPC contract shapes for adapter translation.

## Ownership Boundary

- This repository owns reusable catalog capability contracts.
- Contract metadata consumes `Core.Blueprint.Common.Contracts` and does not redefine Blueprint contracts.
- Persistence and transport implementations remain outside this package.
- Identity abstractions remain Thalos-owned.