Second Brain

by NicholasSpisak

Second Brain is an AI Engineering skill for Claude Code, published by NicholasSpisak in second-brain.

686 stars104 forkson NicholasSpisak/second-brainAdded 2026/08/23+1% in starsRepository updated 2026/04/07

View source on GitHub Download repo ZIP

agent-skillsaiknowledge-basellmmarkdownobsidianpersonal-wikisecond-brain

Install in seconds

Install Second Brain

Copy Second Brain into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/NicholasSpisak/second-brain/tree/main/skills/second-brain ~/.claude/skills/second-brain

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/NicholasSpisak/second-brain.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/second-brain/SKILL.md in NicholasSpisak/second-brain
Installs to: ~/.claude/skills/second-brain
Collection: One of 4 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What Second Brain does

Second Brain sets up a new Obsidian knowledge base using the LLM Wiki pattern. Use it to initialize a vault, choose agent configs, and optionally install supporting CLI tools.

Second Brain is cataloged under AI Engineering on DirSkills. Second Brain comes from a repository tagged agent-skills, ai, knowledge-base, llm and markdown.

Documentation

README

Excerpt

"What would you like to name your knowledge base? This will be the folder name." Default: second-brain

Accept any user-provided name. This becomes the folder name and the title in the agent config.

Step 2: Vault Location

Ask:

"Where should I create it? Give me a path, or I'll use the default." Default: ~/Documents/

This is the opening of the README. Read the full README on GitHub.

Commands Second Brain provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/second-brain-ingest
/second-brain-query
/second-brain-lint

Frequently asked about Second Brain

What else does NicholasSpisak publish alongside Second Brain?
Second Brain is one of 4 skills that DirSkills catalogs from NicholasSpisak/second-brain, the repository it ships in. Its siblings there include Second Brain Ingest, Second Brain Lint and Second Brain Query. Each one is a separate skill with its own page in this directory, installs the same way Second Brain does, and is maintained by NicholasSpisak in that same repository. The rest of the collection is listed on the NicholasSpisak/second-brain page.
How does Second Brain compare to other AI Engineering skills?
Second Brain ranks #1746 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Second Brain against them. Open each page to compare what they document and how they install.