validate_with_llm always fails for my example

[ospaarmann]

First of all: Amazing work. I love the concept and project. I played around a little and I tried the validation using validate_with_llm, but the validation always fails in my example:

defmodule KeyInsight do
  use Ecto.Schema
  use Instructor.Validator

  @doc """
  A key insight a user had

  ## Fields:
  - summary: A short summary of the key insight, addressing the user in the second person singular. 50 words max.
  """
  @primary_key false
  embedded_schema do
    field(:summary, :string)
  end

  @impl true
  def validate_changeset(changeset) do
    changeset
    |> validate_with_llm(:summary, "Must contain the words 'you' or 'your'")
  end
end

Instructor.chat_completion(
  model: "gpt-4o",
  response_model: KeyInsight,
  max_retries: 3,
  messages: [
    %{
      role: "user",
      content:
        """
        Find all key insights in this text. Your reply has to be in the second person singular, 
        addressing the user.

        Text:

        Today I realized that using my phone so much just kills my productivity and I 
        plan to keep the phone in a drawer while I'm working. I also want to understand 
        the dopamine system and how it affects motivation better.
        """
        
    }
  ]
)

Output:

15:21:26.325 [debug] Retrying LLM call for KeyInsight:

 "summary - is invalid, The statement does not contain the words 'you' or 'your'."

15:21:27.930 [debug] Retrying LLM call for KeyInsight:

 "summary - is invalid, The statement does not contain the words 'you' or 'your' as required."

15:21:29.824 [debug] Retrying LLM call for KeyInsight:

 "summary - is invalid, The statement does not contain the words 'you' or 'your' as required by the rule."


{:error,
 #Ecto.Changeset<
   action: nil,
   changes: %{
     summary: "You see that excessive phone use damages your productivity, so you're planning to keep it in a drawer while you work. You're also eager to learn more about the dopamine system and its effect on your level of motivation."
   },
   errors: [summary: {"is invalid, The statement does not contain the words 'you' or 'your'.", []}],
   data: #KeyInsight<>,
   valid?: false,
   ...
 >}

Any idea what is going on here? I think it is pretty clear that this validation should pass. Thank you!