function uiMessageToModelMessages(uiMessage): ModelMessage<
  | string
  | ContentPart<unknown, unknown, unknown, unknown, unknown>[]
  | null>[];

Defined in: activities/chat/messages.ts:62

Convert a UIMessage to ModelMessage(s)

This conversion handles the parts-based structure:

• Text parts → content field
• ToolCall parts → toolCalls array
• ToolResult parts → separate role="tool" messages

UIMessage

The UIMessage to convert

ModelMessage< | string | ContentPart<unknown, unknown, unknown, unknown, unknown>[] | null>[]

An array of ModelMessages (may be multiple if tool results are present)