Ruby server implementation of the AG-UI protocol (SSE event streaming, run loop, client-tool round-trips, A2UI) for driving CopilotKit frontends from Rack/Falcon.

Swaps ratalada's built-in router for a Grape DSL: require this and the Server.run block is class-evaluated into an anonymous Grape::API.

Swaps ratalada's built-in router for a Sinatra DSL: require this and the Server.run block is class-evaluated into an anonymous Sinatra application.