A coordinator concatenates twelve subagent reports into one synthesis prompt, in the order they arrive. Findings from reports near the middle of the prompt are often missing from the final output, even though they are present in the input. What is the most effective fix?

Answer: A — Put a key-findings summary at the start of the input and place each report under an explicit section header

This is the lost-in-the-middle effect: models attend most reliably to the beginning and end of long inputs. Leading with key findings and organizing detail under explicit headers mitigates it. (B) doesn't change the position effect. (C) just moves which findings get lost. (D) gives up on synthesis across reports altogether.