Build a Free Persistent AI Memory System 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 Agents)

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

• 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 Agents)