Function LatestUserInputParts

internal/experimental/a2abridge/a2a_converter.go:50–71

LatestUserInputParts returns the most recent user-role input as a single A2A Part - i.e. what the AX user just typed. The walk goes backward from the end of msgs and returns as soon as it finds a user-role message with usable content (text/file/data).

(msgs []*proto.Message)

// from the end of msgs and returns as soon as it finds a user-role
// message with usable content (text/file/data).
func LatestUserInputParts(msgs []*proto.Message) []*a2a.Part {
	for i := len(msgs) - 1; i >= 0; i-- {
		msg := msgs[i]
		if msg == nil || msg.Role != "user" || msg.Content == nil {
			continue
		}
		if isStateMarkerMessage(msg) {
			continue
		}
		switch msg.Content.Type.(type) {
		case *proto.Content_Confirmation,
			*proto.Content_ToolCall,
			*proto.Content_ToolResult,
			*proto.Content_Thought:
			continue
		}
		if p := contentToA2APart(msg.Content); p != nil {
			return []*a2a.Part{p}
		}
	}
	return nil
}

// contentToA2APart converts a single AX Content variant into an A2A Part.
func contentToA2APart(content *proto.Content) *a2a.Part {