tools: Obsidian + Claude Cowork

Obsidian is a powerful, local-first knowledge base and note-taking application that works on plain text Markdown files. It helps users build a "second brain" by linking ideas together, and it is available on Windows, macOS, Linux, Android, and iOS. [1, 2, 3, 4, 5, 6, 7, 8]

Core Features

• Local Storage: Your notes are saved as normal text files right on your device folder, meaning you truly own your data.
• Note Linking: You can easily connect related notes and ideas to create a personal network of thoughts.
• Graph View: An interactive visual map shows how different notes and topics connect to each other.
• Canvas: An infinite digital whiteboard space used to brainstorm, map out, and visually organize ideas.
• Plugins & Customization: A massive library of community plugins lets you tailor the workspace to fit your personal workflow. [1, 3, 5, 6, 9]

[1] https://obsidian.md/

From personal notes to journaling, knowledge bases, and project management, Obsidian gives you the tools to come up with ideas and organize them.

[2] https://en.wikipedia.org/wiki/Obsidian_(software)

[3] https://www.reddit.com/r/explainlikeimfive/comments/1k5b3ft/eli5_what_is_obsidian_app_and_what_kind_of_people/

[4] https://obsidian.md/help/obsidian

[5] https://www.youtube.com/watch?v=mutS7GIpC9A

[6] https://www.wired.com/story/how-to-use-obsidian-writing-productivity-markdown/

[7] https://www.pcmag.com/reviews/obsidian

[8] https://www.youtube.com/watch?v=z4AbijUCoKU

[9] https://www.youtube.com/watch?v=ROdw1_C1ZjQ

Give Me 15 Minutes. I'll Teach You 80% of Obsidian - YouTube

• Core Functionality: Covers essential Markdown basics, creating and organizing notes, and navigating the user interface.

• Linking & Connections: Demonstrates how to link notes together using bidirectional links ([[note title]]) to build an interconnected web of thoughts.

• Graph View & Customization: Introduces visual features like the Graph View, tags, and core plugins that help structure your personal knowledge system without overwhelming setup.

In How I Use Obsidian + Claude Cowork to Run My Life, Nick Milo (Linking Your Thinking) demonstrates how to build a personalized AI Operating System (AI OS). By pairing Obsidian for local plain-text note storage with Claude Cowork, the setup creates an interactive AI thinking partner that operates directly on your notes without vendor lock-in.

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Key Takeaways

• Future-Proof Data Ownership: Stores all personal notes and insights locally in plain Markdown (.md) files via Obsidian. This keeps your data portable and accessible even if AI tools change or become obsolete.

• Context-Driven AI Partner: Uses dedicated context files (like a Me.md profile) to feed the AI rich personal context, enabling tailored responses and proactive assistance.

• Structured Navigation (Maps of Content): Leverages "Maps of Content" (MOCs) to structure topics, making it easy for both you and the AI assistant to navigate your web of thoughts.

• Seamless Collaboration: Integrates Claude Cowork directly with your local Obsidian vault so the AI can read, reference, and assist in refining your project notes in real time.

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Breakdown by Section

• 00:00 — My AI OS: Overview of the system philosophy and benefits of a model-agnostic, local-first setup.

• 01:11 — Step 1: Setting Up Obsidian: Establishing your local Markdown vault as the core digital home ("Ideaverse").

• 03:22 — Step 2: Setting Up Claude Cowork: Configuring Claude to interface with local files and directory structures.

• 07:02 — Step 3: Setting Up Your Maps: Creating structured MOCs and context files to guide the AI's understanding.

• 11:34 — Step 4: Linking Your AI: Connecting all components together for active note interaction and co-working.