obsidian-second-brain: Persistent memory for Claude Code, Codex and 6 other AI agents, stored as plain markdown in your Obsidian

by eugeniughelbur · Claude Skill · ★ 5.2k

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

Featured in: Knowledge Base & RAG · Obsidian for Claude Code & AI Agents

How to install obsidian-second-brain

git clone https://github.com/eugeniughelbur/obsidian-second-brain ~/.claude/skills/obsidian-second-brain

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 67/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

🧪 Tested by Agent Skills Hub

One of 5 tools we ran end to end on the same task for our Obsidian for Claude Code & AI Agents page (2026-10-10).

Result: Answered with Claude Code's own file tools; the skill is for building and maintaining a vault. · answered 15 of 15 questions about a test vault · 1.9× the tokens of plain file tools · 0 calls through the tool, 8 through plain file tools

See the answers → · See the whole test →

agent-memoryagent-skillsai-agentsai-note-takingai-second-brainclaudeclaude-codeclaude-code-skillclaude-memoryclaude-plugin

Quick Facts

Stars5,208
Forks641
LanguagePython
CategoryClaude Skill
LicenseMIT
Quality Score67/100
Open Issues10
Last Updated2026-11-07
Created2026-03-24
Platformsclaude-code, codex, python
Est. Tokens~16k

About obsidian-second-brain

obsidian-second-brain Your Obsidian vault is dead weight. This skill makes it alive. 24 commands · self-rewriting knowledge base · auto-synthesis · thinking tools that argue with you · 4 scheduled agents · 4 role presets See it in action · All commands · Install · Presets · Discussions The Problem You use Claude every day.

obsidian-second-brain alternative? Top 6 similar tools

Looking for a obsidian-second-brain alternative? If you're comparing obsidian-second-brain with other claude skill tools, these 6 projects are the closest alternatives on Agent Skills Hub — ranked by topic overlap, star count, and community traction.

  • claude-obsidian by AgriciDaniel · ⭐ 15.8k

    Self-organizing AI second brain for Obsidian + Claude Code. Drop any source and Claude reads, links, and files

  • obsidian-wiki by Ar9av · ⭐ 3.7k

    Framework for AI agents to build and maintain a digital brain through Obsidian wiki | Memory System for Agents

  • llm-wiki-agent by SamurAIGPT · ⭐ 3.7k

    A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads t

  • claude-blog by AgriciDaniel · ⭐ 2.6k

    Free, open source blog writer for Claude Code. Researches current sources, writes answer-first posts for Googl

  • synthadoc by axoviq-ai · ⭐ 1.9k

    Synthadoc: An open-source LLM knowledge compilation engine that turns raw documents into structured, local-fir

  • obsidian-claude-pkm by ballred · ⭐ 1.9k

    A complete starter kit for an Obsidian + Claude Code personal knowledge management system.

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

View on GitHub → Browse Claude Skill tools