I keep seeing wildly different setups people call their "AI OS," and most fall into one of three camps: 1. Plugin-native — everything happens inside Obsidian itself (Smart Connections, Text Generator, Copilot for Obsidian). The vault and the AI live in the same window. 2. Agent-on-vault — Obsidian is just the storage layer (plain markdown on disk), while the real brain runs outside it — Claude Code in a terminal, a VS Code workspace, a script or n8n workflow reading/writing those files. Obsidian becomes a passive viewer, or disappears entirely. 3. Custom interface — people building their own front-end (web app, CLI, whatever) on top of the vault structure, keeping the markdown but ditching Obsidian as the UI altogether. Which camp are you actually in, and why? Is Obsidian still your interface, or just your database now? What's the weak point in your current setup — sync, context window, latency, something breaking when the vault gets big? Drop your real stack below (plugins, tools, how the pieces talk to each other) — let's compare actual setups, not just opinions.