https://scottsiu.me/Writing by Scott Siu, including articles originally published with Cortrix.enhttps://scottsiu.me/writing/vector-is-not-semantic/https://scottsiu.me/writing/vector-is-not-semantic/A small retrieval demo separates similarity, ranking, lifecycle checks, and the application rule that decides whether a result is usable.Thu, 10 Sep 2026 02:59:30 GMTInside Cortrixhttps://scottsiu.me/writing/dbpedia-linked-data-explained/https://scottsiu.me/writing/dbpedia-linked-data-explained/Why stable identities and linked data still matter when your agents retrieve knowledge from different systems.Mon, 07 Sep 2026 04:30:15 GMTKnowledge graphshttps://scottsiu.me/writing/transe-knowledge-graph-embeddings/https://scottsiu.me/writing/transe-knowledge-graph-embeddings/What the simple h + r ≈ t formula tells us about relationships in a knowledge graph, and what a similarity score leaves out.Mon, 07 Sep 2026 04:30:15 GMTKnowledge graphshttps://scottsiu.me/writing/rag-external-memory-data-governance/https://scottsiu.me/writing/rag-external-memory-data-governance/RAG lets a model use external knowledge. The original paper also helps explain why sources, updates, and data governance still matter.Mon, 07 Sep 2026 04:30:15 GMTRetrievalhttps://scottsiu.me/writing/reflexion-agent-memory-without-weight-updates/https://scottsiu.me/writing/reflexion-agent-memory-without-weight-updates/Reflexion turns feedback into memory without changing model weights. Its most useful lesson may be about the evaluator.Mon, 07 Sep 2026 04:30:15 GMTAgent memoryhttps://scottsiu.me/writing/hipporag-knowledge-graphs-for-rag/https://scottsiu.me/writing/hipporag-knowledge-graphs-for-rag/HippoRAG connects clues across documents with a knowledge graph. Here is how it works, and where the graph can go wrong.Mon, 07 Sep 2026 04:30:15 GMTRetrievalhttps://scottsiu.me/writing/cortrix-rc2-release/https://scottsiu.me/writing/cortrix-rc2-release/Cortrix RC2 brings 24.4% higher FiQA Recall@10 in the published comparison, Apache 2.0 licensing, and practical ingestion and agent integration fixes.Mon, 07 Sep 2026 04:30:15 GMTProduct updates