Don't just fetch nearest neighbors: a 6-point retrieval ranking cheatsheet for agent memory
blaizedsouza · x · 2026-08-20
A developer shares a retrieval ranking cheatsheet for agent memory: agents need the most useful memory, not the most similar sentence. Key points:
- Score relevance to the current goal
- Boost recent and trusted sources
- Penalize stale or contradicted facts
- Limit how many memories enter the prompt
- Mix semantic match with exact identifiers
- Log which memories actually changed the answer
Core principle: retrieval quality is part of reasoning quality — don't rank by embedding distance alone.
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