Solving the Erasure / Receipt Trilemma in AI Memory and RAG

<p>Why delete_all(user_id=...) breaks GDPR compliance in practice — and how length-prefixed salted Merkle documents, two-tier AES-256-GCM crypto-shredding, and two-direction benchmarks close the gap.</p> <ol> <li>The Hidden Failure Modes of AI Memory Deletion</li> </ol> <p>Most vector stores (Qdrant, Chroma, Pinecone, pgvector) and agent memory layers (Mem0, Letta, LangMem) make storing facts and

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