Obsidian Vault as Claude Code Persistent Brain: Community Tool Built in a Weekend Goes Viral

r/ClaudeAI·medium signal

A r/ClaudeAI developer (141 upvotes, 115 comments) built and open-sourced a tool that uses an Obsidian vault as a persistent memory layer for Claude Code — storing architectural decisions, context, and session state in Obsidian's local graph, which Claude reads at session start to eliminate the 'every session starts from scratch' problem. The post was 'overwhelmed by response' and the author is packaging the full setup for public release. This is a practitioner-validated pattern for persistent agent memory using a tool the Claude Code ecosystem already supports natively.