Build an Obsidian knowledge base in Claude Cowork

Goal: Give Cowork a knowledge base that improves daily.
Setup: agents used in source: Claude; tools/MCPs stated: Obsidian, MCP.
Steps:
1. Build a custom MCP server for your Obsidian vault.
2. Add skills for how Cowork should read and write notes.
3. Onboard teammates to the same knowledge base.
Rules: ask me before anything irreversible (sending, posting, paying, deleting); don’t invent data, results or tools I haven’t given you; tell me what you couldn’t verify.
Based on: FiL Dev — https://x.com/FiLHashDev/status/2099973196120207374 (summarised from source; the source has no explicit step list)

Steps are our summary of the source (it has no explicit step list). Includes a “Based on” credit line.