Kino Video Provider Extension

Headless provider for media.video.generate@1. It intentionally has no UI and does not import wb-game-video or wb-asset-canvas.

The provider targets the Workbench Host 0.2 provider contract. Import providerExtension from the package and pass it to createWorkbenchHost({ providerExtensions: [providerExtension] }). The Host owns capability selection, polling, media persistence, and error mapping; this package only translates the Kino HTTP protocol through the injected arrival-kino service capability.

The host injects typed media and service capabilities and owns the unified service-account headers. The provider scopes every request with host-derived game values, never reads credentials from the environment, and never logs a prompt, URL, locator, or credential value.

Kino currently documents POST/GET generation APIs. Cancellation remains a follow-up contract change rather than an undocumented provider side channel.

The package is published independently from Asset Canvas. Asset Canvas owns the canvas UI and service binding factory; it does not embed this provider.