Vercel ships @ai-sdk/workflow 1.0.0 with stable telemetry, Node 22 minimum, and a default block on system messages in agent prompts.
Vercel's @ai-sdk/tui beta 18 adds a sandbox option for tool execution and loosens generic constraints on runAgentTUI.
Vercel's WorkflowAgent now blocks system messages inside prompt or messages arrays, aligning with generateText and streamText behavior.
Vercel's AI SDK LangChain adapter v2.0.215 fixes a bug where citation metadata from RAG and web search was silently discarded instead of surfaced as UI message parts.