From Docusaurus MAI to a WordPress AI Chat with Vectors (opens in new tab)

The journey of how "the chat" evolved across projects, the three architectures we ended up with, their pros and cons, and which one to reach for per project. TL;DR — three working approaches, each right for a different target: Static JSON index inside a Docusaurus/Vercel site (MAI) — zero infra, ship today. Postgres + pgvector hosted RAG service (Neon) — real semantic search at scale, multi‑user. Self‑contained WordPress plugin with vectors in the site DB (Grekai Chat) — installs on any WP, n...