claude-skill

obsidian-second-brain

Name: obsidian-second-brain
Author: eugeniughelbur

Persistent memory for Claude Code and 6 other CLI agents, stored as plain markdown in your Obsidian vault. Stop re-explaining your projects, decisions and people every session. 45 commands: hybrid semantic search, self-rewriting notes, key-less web research, and scheduled agents that maintain the vault while you sleep.

4,863 stars+84★ this week593 forksPythonUpdated 10/20/2026100% free · open source

What it does

Obsidian-second-brain provides a persistent memory for CLI agents, storing project information and decisions in plain markdown for easy recall and reuse.

When to use it

•When working on complex projects that require frequent explanations of context and decisions
•When using multiple CLI agents and need a unified memory system
•When seeking to automate knowledge management and research tasks

Ready-to-paste prompt

Use the `sb init` command to set up a new second-brain system, and then use `sb note 'My Project'` to create a new note with a template for storing project context and decisions

Heads up: Make sure you have Python and the required dependencies installed, and that your Obsidian vault is properly configured to work with the second-brain system, as outlined in the README

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/obsidian-second-brain && curl -fsSL https://workflowstacks.com/api/skills/obsidian-second-brain/claude-skill -o ~/.claude/skills/obsidian-second-brain/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How obsidian-second-brain works

Codeflow

Free to inspect

Obsidian-second-brain is a large Python project (~24k lines across 100 code files, plus 78 test files). You install it into your AI tool with one command; there is nothing to run yourself. Last commit this month, MIT license, has a test suite.

Size

Large codebase

~24k lines · 100 code files · ~3 h to skim

Setup

Install as a skill / plugin

Add it to Claude Code (or your AI tool) with one command — 1 skill inside. Nothing to run yourself.

Runs on

Inside your AI tool

Helper scripts use Python · needs API keys

Python 86%Shell 12%TypeScript 1%JavaScript 1%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
CLAUDE.md
The instructions the AI actually follows
3
.env.example
The API keys and settings you must provide
4
examples/README.md
A worked example — copy this to get going

What's in each folder

commands/Prompts, skills & agent definitions47 files

integrations/Sub-packages / plugins21 files

adapters/Sub-packages / plugins10 files

docs/Documentation49 files

examples/Examples you can copy8 files

scripts/Helper scripts80 files

references/Folder14 files

hooks/Hooks — scripts that auto-run on events12 files

READMEHas testsDocumentedCI checksExamples includedMIT licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/obsidian-second-brain && curl -fsSL https://workflowstacks.com/api/skills/obsidian-second-brain/claude-skill -o ~/.claude/skills/obsidian-second-brain/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

eugeniughelbur

Language

Python