Shapley Context Pruning: A Cooperative Game Perspective for Context Reranking and Pruning

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Researchers applied Shapley values from cooperative game theory to solve the 'loss in the middle' problem in RAG systems. By treating retrieved context like players in a game, this framework mathematically identifies which chunks actually contribute to a correct answer and prunes the rest. This offers a more interpretable way to handle long context windows without the usual performance degradation.