How I took LongMemEval oracle from 62% to 82.8% without touching the retriever

I've been building a memory layer for AI agents (MnemoPay) and LongMemEval is the public benchmark I've been beating my head against for the last two weeks. Started at 62-64% (Sonnet-4 answerer, GPT-4o judge). Ended today at 82.8%. Here's what actually moved the number and what didn't. Scoreboard 500-question oracle variant, GPT-4o as judge. Run Overall Notes Baseline 62-64% Sonnet-4 answerer, default prompt Session summarizer ~72% Compressed each session to a tight recap before feeding into con