Obsidian as the Brain of Claude

A Markdown vault becomes persistent long-term memory for Claude Desktop and Claude Code. Via MCP both reach into the same vault — same context, same knowledge, shared across sessions, days, and tools. Versioned through Git, runs entirely local or in your own cloud storage, GDPR- and BSI-C5-clean by construction. This field guide covers the concept (why Markdown beats a vector DB for many use cases), the solo and team setup, the upkeep routines that keep the vault from entropy, and the maintenance scripts the DANIC team uses. A practice-stack for anyone who wants Claude to do useful work beyond toy demos — without depending on cloud memory services.