@voyant-travel/admin-extension-sdk

The versioned contract and author client for Voyant admin UI extensions — a tiny, dependency-free package shared by the admin host, the cloud platform, and extension authors.

It exports:

• ADMIN_UI_EXTENSION_API_VERSION — the semver the host implements.
• The shared value types (UiExtensionContext, UiExtensionDescriptor, …).
• The postMessage protocol: message types, creators, and type guards.
• initUiExtension(options?) — the author client that runs inside the sandboxed extension frame, performs the host handshake, and returns a handle exposing the context/config plus navigate / toast / resize actions (with automatic height reporting).

import { initUiExtension } from "@voyant-travel/admin-extension-sdk"

const handle = await initUiExtension()
handle.onContextChange((context) => applyTheme(context.theme))
handle.actions.toast("success", `Hello ${handle.context.viewer.displayName}`)

The host side (slot registry, UiExtensionHost, the admin-extension factory) lives in @voyant-travel/admin. See docs/architecture/admin-ui-extensions.md for the authoring guide, protocol reference, and versioning policy.