ai

pgvector and RAG, Explained Through a Real Knowledge Workflow

Jiyu Yan
Engineering
17 Jun, 2026

RAG sounds more mysterious than it is. The name means Retrieval-Augmented Generation. That is a long way to say: before asking an AI model to answer, first retrieve the most relevant source material,

MCP as a Safe AI Integration Boundary

Jiyu Yan
Engineering
09 Jan, 2026

MCP is interesting because it makes AI integrations feel less like prompt magic and more like software boundaries. That is the part I care about. A model should no

Vercel AI SDK with Explicit Tool Boundaries

Jiyu Yan
Engineering
22 Aug, 2025

The risky part of an AI feature is not the chat UI. The risky part is what the chat is allowed to do. It is easy to make an assistant feel powerful by giving it tools. With something like the [Vercel