Obsidian Vault for Claude Cowork — Field Guide

Build an Obsidian vault as a knowledge base for Claude Cowork — including skills and agents. Three control files (CLAUDE.md, _INDEX.md, _LOG.md), six steps, three skills. Effort: one weekend. No terminal, no code, no automation tools. The guide walks through vault structure (what's storage, what's index, what's log), the initial control files (Claude reads them at session start), the six build steps from empty vault to daily-use-ready, and three skills that wire the vault into other DANIC tools. Companion to the Obsidian-as-Claude-Brain field guide — this one is the practical walkthrough for non-engineers.