msgconv

type UIMessageMetadataParams struct {
	TurnID           string
	AgentID          string
	Model            string
	FinishReason     string
	CompletionID     string
	PromptTokens     int64
	CompletionTokens int64
	ReasoningTokens  int64
	TotalTokens      int64
	StartedAtMs      int64
	FirstTokenAtMs   int64
	CompletedAtMs    int64
	IncludeUsage     bool
}

type UIMessageParams struct {
	TurnID     string
	Role       string // "assistant", "user"
	Metadata   map[string]any
	Parts      []map[string]any
	SourceURLs []map[string]any // Optional source-url and source-document parts
	FileParts  []map[string]any // Optional generated file parts
}