# @open-matrix/sdk Contract

`@open-matrix/sdk` is a package-author facade over the public SDK package set.

It may export from the Node-safe root:

- `@open-matrix/core`
- `@open-matrix/browser-host`
- `@open-matrix/contracts`
- `@open-matrix/federation`
- `@open-matrix/omega-core`

Browser app build utilities remain in `@open-matrix/browser-kit` and are
imported directly from that package.

It must not depend on Matrix-3 product packages, Host Service, Host Control,
system actors, HiveCast installer state, Device Link state, Postgres, or NATS
authority/signing packages.