# Textual Strategy for: o4-mini (o4_mini_InitialAgent)
# LLM API: openai, Model: o4-mini-2025-04-16
# LLM Suggested Fallback: C

Strategy Description for o4_mini_InitialAgent

Overview  
We adopt a “nice” Tit-for-Tat approach with explicit self-recognition.  We never defect first, we respond in kind to defections, and we fully cooperate when facing an identical copy of ourselves.  This yields mutual cooperation with fellow cooperators (high average payoff), punishes defectors just enough to deter exploitation, and ensures perfect cooperation in self-play.

Core Logic  

1. Self-Recognition Check  
   – At the start of each round, compare the opponent’s source code string to our own function’s source.  
   – If they match exactly, we know it is self-play. In that case always cooperate (‘C’) on every round to secure the mutual-cooperation payoff.

2. First Move  
   – If no moves have been played yet in this IPD match (i.e. `my_history` is empty), return ‘C’.  
   – This establishes goodwill and allows us to earn the reward rather than risk an unnecessary defection.

3. Tit-for-Tat Response  
   – Otherwise look only at the opponent’s last move (the final element of `opp_history`):  
       • If their last move was ‘D’, return ‘D’ (punish the defection).  
       • Otherwise (their last move was ‘C’), return ‘C’ (cooperate).

4. Forgiveness is built in by only punishing one round at a time and immediately returning to cooperation if the opponent does.

Edge Cases  
– If for any reason histories are mismatched or the code‐comparison fails, the logic will fall through to the “last‐move” check, which defaults to cooperating unless punished.  
– We do not introduce randomness (deterministic behavior) and we avoid any risky end-game defections.

Why This Works  
– Against pure cooperators: we cooperate every round, earning the mutual reward (3 points per round).  
– Against pure defectors: we defect after their first defection, avoiding being repeatedly exploited.  
– Against Tit-for-Tat‐like strategies: we lock into stable cooperation.  
– Against ourselves: code detection yields perfect cooperation every round.  
– The simple structure is robust in a 10-round match—punishment is swift but only one-round long, and there is no costly last‐round race to defect.