I just did it in the playground to test out actually, but it still seems to fail/lose state after some time. Right now where I got a win was after:

        [{ "who": "you", "column": 4 },
        { "who": "me", "column": 3 },
        { "who": "you", "column": 4 },
        { "who": "me", "column": 2 },
        { "who": "you", "column": 4 },
        { "who": "me", "column": 4 },
        { "who": "you", "column": 5 },
        { "who": "me", "column": 6 },
        { "who": "you", "column": 5 },
        { "who": "me", "column": 1 },
        { "who": "you", "column": 5 },
        { "who": "me", "column": 5 },
        { "who": "you", "column": 3 }] 

Where "me" was AI and "you" was I.

It did block twice though.

My final prompt I tested with right now was:

Let's play connect 4. Before your move, explain your strategy concisely. Explain what you must do to make sure that I don't win in the next step, as well as explain what your best strategy would be. Then finally output the column you wish to drop. There are 7 columns. Always respond with JSON of the following format:

type Response ={

      move_history: { who: string; column: number; }[]

      am_i_forced_to_block: boolean;       

do_i_have_winning_move: boolean;

      other_considerations: string[];       

explanation_for_the_move: string;

column_number: number; }

I start with 4.

ONLY OUTPUT JSON