#tier-2
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2026-03-10
Query-Theme-Keyed Search ExpansionTwo users search 'sleep' and get different results — with no LLM at query time. How pre-computed, theme-keyed expansion terms turn a flat search into something that actually knows you.
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2026-03-10
Negative Signals as First-Class Citizens in RecommendationWhat users don't do matters more than what they do. Most recommendation systems are built entirely on applause. Here's why the silence is louder.