# Inventory Versioning Policy

## Policy

- Contract changes follow additive-first evolution.
- Breaking changes require a new major package version.
- Deprecated members should remain for at least one release cycle.

## Blueprint Compatibility

- Package descriptor metadata is implemented via `IBlueprintPackageContract` from `Core.Blueprint.Common.Contracts`.
- Inventory contracts consume Blueprint common contract primitives rather than redefining them.

## Compatibility Notes

- Consumer repositories (`furniture-service`, `furniture-bff`) should update contracts explicitly.
- Protocol adapters remain edge concerns; inventory contracts remain transport-neutral.