Why it matters

Retrieval shapes memory utility. Understanding shapes design.

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The architecture

Query embedding.

Vector + BM25 search.

Recency bias.

Rerank + inject in prompt.

Memory retrieval stackQuerycurrent contextMulti-signal searchvector + BM25 + recencyInject in prompttop-K memoriesRerank + recency + user-scoped filter; monitor hit rate
Memory retrieval.
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How it works end to end

Vector similarity + BM25.

Recency + relevance combined.

User-scope filter.

Rerank top-K.