Anyone can help me to install this addon?

If you connected the button through the editor you can remove your _ready function, since the button is already connected.

now, this is a little working… but a last issue

extends Control

@onready var aiChat = $NobodyWhoChat
@onready var button = $Button


func _on_button_pressed() -> void:
	print("send message to LLM...")
	aiChat.say("hello, who are you?")

func _on_nobody_who_chat_response_updated(new_token: String) -> void:
	print("parcial awnser:", new_token)

func _on_nobody_who_chat_response_finished(response: String) -> void:
	print("complete awnser:", response)
	
	
	
	

when I press the button, the window closes, why? the console doesn’t tell me anything

sounds like a crash with the extension, could be a bug to report to nobodywho github. Maybe there are more settings you need to tune with the node; I haven’t used this addon so I have no experience of what it requires to be functional.