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Servers push more than tool results: logs, progress updates, elicitation requests, and change notifications. Wire up handlers when connecting: 
const client = await Client.connect('http://localhost:3000', {
  handlers: {
    log: ({ level, data }) => console.error(`[server:${level}]`, data),
    progress: ({ progress, total, message }) => render(progress, total, message),
    onToolsListChanged: { onChanged: (tools) => refresh(tools) },
  },
})
This page is under construction. The outline below sketches what it will cover.
  • Notification handlers — log (every server log message), progress (global default, overridable per call via onProgress), and the three on*ListChanged handlers with auto-refresh and debouncing.
  • Request handlers — sampling and elicitation answer server-initiated requests; providing them advertises the corresponding capability.
  • Roots — static string[]/Root[] or an async callback for dynamic roots; notifyRootsChanged() for pushing updates.
  • Log level control and completion — setLogLevel(level) to filter server logs; complete(ref, argument) for prompt/resource argument autocompletion.