Build a Free Persistent AI Memory System Using Claude Code and Obsidian

Free persistent memory for Claude using Claude Code and Obsidian

Claude Code + Obsidian

By the end of this guide, you'll have a free, automated memory system where Claude Code writes your project notes and Obsidian organizes them visually so your AI never loses context between sessions again.

Who This Is For

  • You're using Claude Code across multiple sessions and it keeps "forgetting" past decisions.

  • You're manually copying context into every new prompt just to keep the AI up to speed.

  • You've heard of vector databases for AI memory but don't want to pay for one.

  • You're managing a project with multiple moving parts and need a way to track what was decided and why.

  • You want your AI outputs to get more accurate over time, not stay flat.

What You'll Build

An automated documentation loop connecting Claude Code to an Obsidian vault:

  • Claude Code writes structured .md memory files automatically as you work.

  • Obsidian reads those files natively, no plugins, no configuration.

  • Obsidian's Graph View shows you the live relationships between every decision, file, and session.

  • Follow-up prompts pull that memory back into Claude for faster, more accurate outputs.

What You'll Need

  • Claude Code installed and running locally.

  • Obsidian, free download at obsidian.md.

  • A folder on your device to use as your Obsidian vault.

  • No plugins, no paid tiers, no extra tools.

Going Further

  • Scale this with a multi-agent system - Guide: Run 60 AI Coding Agents in Parallel Using Rooflow and Claude Code (AI Agent)

  • Build a prompt library alongside your vault - Guide: Build a Personal Prompt Library and Organize It for Daily Use (AI Foundation)

  • Use this memory structure for content workflows, not just code - Guide: Build an Agent That Drafts Your Social Captions from a Weekly Topic List (AI Agent)