VoltAgent/voltagent @voltagent/vercel-ui@1.0.1

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Patch Changes

• #515 f87aa97 Thanks @omeraplak! - fix: properly separate subagent text streams in UI message conversion - #508

  • Added agent transition detection in toUIMessageStream adapter
  • Text streams from different agents (subagents and supervisor) now have separate text part IDs
  • Each agent transition ends the current text stream and starts a new one with a unique ID
  • Emit data-subagent metadata events when switching to a subagent
  • Reset subagent tracking on stream flush for clean state

  This fix ensures that text-delta events from different agents can be distinguished in the UI, preventing text from multiple agents being merged into a single text part. The fullStream now properly separates each agent's response with unique IDs (e.g., id:"1" for MathAssistant, id:"2" for DateTimeAssistant, id:"3" for Supervisor).

  Fixes the issue where parallel subagent execution would result in mixed text streams that couldn't be distinguished by source agent.