Chase H makes a compelling case: Claude Code and Obsidian together create something neither can do alone. The tool that makes this possible isn't some expensive AI middleware or complex RAG system—it's a free filing cabinet for your thoughts.
What Makes Obsidian Different
Obsidian is an orchestration layer sitting on top of your markdown files in a folder called a vault. Unlike Notion or other note-taking tools, Obsidian doesn't lock you into vendor platforms. Everything you create is yours—you own it completely.
The real value comes from seeing how notes connect. Click any file and you'll see relationships to related documents. The visual graph on the right shows exactly how projects and ideas relate to each other. With a community of over 2,700 plugins available, Obsidian can be customized endlessly.
But here's where most people get stuck: using Obsidian effectively requires drafting markdown files with specific linking conventions—double brackets around note names, proper formatting, organized folder structures. That's tedious work humans won't do manually. Enter Claude Code.
The Symbiotic Relationship
When you combine Claude Code with Obsidian, something powerful happens. Claude Code acts as a personal assistant that transforms whatever you tell it—whether through prompts, conversations, or rough ideas—into properly formatted markdown files in Obsidian's format. It links everything together automatically.
This isn't just about seeing your notes more clearly. By organizing your files into a coherent hierarchy and connecting them meaningfully, you improve Claude Code's performance directly. The tool becomes better at finding relationships between documents, which compounds over time like daily notes accumulating for years.
The result is what Chase calls "a brain within a brain"—your second brain in Obsidian, with claude.md acting as the frontal cortex making decisions based on everything else you've accumulated.
Setting Up the System
Getting started takes minutes. Download Obsidian from obsidian.md or search Google for the download page. The installer asks where you want your vault—a folder that can live anywhere on your computer, even your desktop. Inside the vault, create subfolders like daily notes, research, and projects.
Once you've created the vault, navigate to a folder inside it in your terminal and start Claude Code. You'll see files appear naturally as you work. To get Claude Code following Obsidian conventions consistently, just tell it directly: "All markdown files need to follow obsidian conventions." Search for Obsidian skills repos online if you want to go further.
The claude.md File as Living Document
The claude.md file traditionally lists project conventions. A recent study called "Evaluating Agents.mmd" found that repository-level context files often hurt more than help because they bring in irrelevant conventions across different parts of a codebase.
However, for personal use cases like note-taking and thinking, claude.md works perfectly. Because your conventions aren't about code—they're about how you want markdown files formatted and how you think—claude.md becomes a living breathing document. Chase demonstrates this after just weeks of using Obsidian with Claude Code: the file continues improving as you add more notes.
The workflow creates what researchers call "a second brain"—Obsidian stores everything, claude.md acts as the decision-making layer that can reference details as needed. The next video in this series shows exactly how to use Claude Code as a research assistant combined with YouTube search and Notebook LM, dumping results directly into your second brain.
Critics Might Note
A counterargument worth considering: while Obsidian provides meaningful organization, some users may prefer full RAG (Retrieval Augmented Generation) systems with embeddings and semantic analysis for deeper insights. For most people, that approach is too complex to build and maintain—and the value add doesn't justify the effort. But power users working on sophisticated projects might find the simple filing cabinet metaphor limiting.
Pull Quote
Obsidian is going to be the filing cabinet. It's free both in terms of actual cost and it's not like this is costing us tokens. This is kind of honestly free value—you know, and it's not free value in terms of oh, if you use Obsidian after this video, your life's going to change.
Bottom Line
Chase's strongest argument is the happy medium between chaos and overwhelming complexity—most users don't need a Library of Congress approach but do need more than scattered files. The vulnerability: this remains a demonstration rather than a comprehensive guide, leaving readers wanting more specifics on implementing the full workflow shown in upcoming videos.