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obsidian-second-brain

Persistent memory for Claude Code, Codex and 6 other AI agents, stored as plain markdown in your Obsidian vault. New: Crew, one shared logbook so Claude Code, Codex, Cursor and Grok Bot know what each other did. 48 commands: semantic search, self-rewriting notes, key-less research, scheduled agents.

  • 4.9k stars
  • 593 forks
  • 13 open issues
  • Language: Python
  • License: MIT
  • updated

Install

Terminal
git clone https://github.com/eugeniughelbur/obsidian-second-brain ~/.claude/skills/obsidian-second-brain
  1. Clone the repository into your ~/.claude/skills directory (or copy the skill folder containing SKILL.md).
  2. Start a new Claude Code session so the skill registry reloads.
  3. Invoke it by name, or let Claude trigger it automatically when the task matches.

If the repo bundles several skills, copy only the folders you need.

Editor's note

Obsidian Second Brain is a Claude Code skill that extends an Obsidian vault with 44 slash commands, turning it into an AI-managed knowledge base that rewrites and reconciles notes rather than simply appending to them. It installs into Claude Code as a skill set and also runs on Codex CLI, Gemini CLI, and OpenCode, sharing a single Python codebase across all four. Core capabilities include research commands such as `/research-deep` (which pulls live results via Perplexity and Grok), `/x-read` and `/x-pulse` for X content, `/youtube` and `/podcast` for media transcription, and `/notebooklm` for querying the vault itself via Gemini File Search. The v0.10 addition `/obsidian-architect` scans a codebase and writes refreshable architecture notes into the vault without overwriting user edits. Four scheduled agents, Google Calendar integration, anti-hallucination validators, and a `/create-command` interview flow round out the toolkit. Researchers, developers, and knowledge workers who already use Obsidian and want AI to actively maintain and synthesize their vault over time are the primary audience.

Installable items

24 items in this repository

create-commandSlash Command

Create a new obsidian-second-brain command via interview - zero markdown editing required

Install
idea-discoverySlash Command

Surface 3-5 next-direction candidates by reading ungraduated ideas, open project questions, and orphan research notes - what is worth working on next

Install
notebooklmSlash Command

Vault-first source-grounded research via Gemini File Search. One command, no browser. The grounded parallel to /research-deep (which is open-web via Perplexity).

Install
obsidian-adrSlash Command

Generate a decision record when the vault structure changes - the vault knows why it knows what it does

Install
obsidian-agendaSlash Command

Read Google Calendar and write an AI-first snapshot to the vault - today, week, next week, or a custom range

Install
obsidian-architectSlash Command

Scan a codebase and write a maintained set of architecture notes into the vault - overview, per-module notes, key decisions. Re-run to refresh without clobbering your edits

Install
obsidian-boardSlash Command

Show or update a kanban board - flags overdue items, updates from conversation

Install

Bulk-triage a kanban board - surface stale items and archive, reschedule, or mark them done in one pass

Install
obsidian-brainstormSlash Command

Multi-turn Socratic brainstorm - one question per turn until the idea converges, then a design note with named alternatives and one recommendation

Install
obsidian-calendarSlash Command

One calendar command with four modes - agenda (read a snapshot), reconcile (vault vs calendar gaps), meeting (event to note), schedule (task to event)

Install
obsidian-captureSlash Command

Quick idea capture - zero friction, saves to your ideas folder and mentions in daily note

Install
obsidian-catchupSlash Command

Review and process everything captured on the go from the Telegram journal bot - voice, text, images, PDFs, links - waiting in the catchup queue. You pull it when you are back at the laptop; nothing is processed autonomously.

Install
obsidian-challengeSlash Command

Red-team your current idea against your own vault history - finds contradictions, past failures, and flawed assumptions

Install
obsidian-connectSlash Command

Bridge two unrelated domains using your vault's link graph - forces creative friction to spark new ideas

Install
obsidian-dailySlash Command

Create or update today's daily note - pulls calendar events, overdue tasks, and conversation context

Install
obsidian-decideSlash Command

Record decisions - lightweight by default (logged to project notes), or a full ADR record with --formal

Install
obsidian-distillSlash Command

Condense a long note or source into key claims, each tagged with provenance back to the exact source block it came from

Install
obsidian-emergeSlash Command

Surface unnamed patterns from your recent notes - recurring themes, hidden connections, and conclusions you haven't explicitly stated

Install
obsidian-exportSlash Command

Export a clean structured snapshot of the vault that any agent or tool can consume - flat JSON, markdown index, or an OKF (Open Knowledge Format) bundle

Install
obsidian-findSlash Command

Smart vault search - returns results with context, not just filenames

Install
obsidian-graduateSlash Command

Promote an idea fragment into a full project spec with tasks, board entries, and structure

Install
obsidian-healthSlash Command

Run a vault health check - grouped by severity, detects contradictions, concept gaps, stale claims, and structural issues

Install
obsidian-ingestSlash Command

Ingest a source into the vault - the vault rewrites itself around new knowledge. Every ingest updates entities, rewrites stale claims, synthesizes new concepts, and resolves contradictions.

Install
obsidian-initSlash Command

Scan your vault and generate a _CLAUDE.md operating manual, index.md catalog, and log.md pointer

Install
README

Skills overview

README preview not available. Visit the repo on GitHub for full documentation.
Topics
agent-memoryagent-skillsai-agentsai-note-takingai-second-brainclaudeclaude-codeclaude-code-skillclaude-memoryclaude-pluginclaude-skillcodexkarpathy-llm-wikiknowledge-graphknowledge-managementobsidianobsidian-mdpersonal-knowledge-managementpkmsecond-brain
Frequently asked

What people ask about obsidian-second-brain

What is eugeniughelbur/obsidian-second-brain?

eugeniughelbur/obsidian-second-brain is skills for the Claude AI ecosystem. Persistent memory for Claude Code, Codex and 6 other AI agents, stored as plain markdown in your Obsidian vault. New: Crew, one shared logbook so Claude Code, Codex, Cursor and Grok Bot know what each other did. 48 commands: semantic search, self-rewriting notes, key-less research, scheduled agents. It has 4.9k GitHub stars and its last recorded update is dated 2026-10-20.

How do I install obsidian-second-brain?

You can install obsidian-second-brain by cloning the repository (https://github.com/eugeniughelbur/obsidian-second-brain) or following the README instructions on GitHub. ClaudeWave also provides quick install blocks on this page.

Is eugeniughelbur/obsidian-second-brain safe to use?

Our security agent has analyzed eugeniughelbur/obsidian-second-brain and assigned a Trust Score of 97/100 (tier: Verified). See the full breakdown of passed checks and flags on this page.

Who maintains eugeniughelbur/obsidian-second-brain?

eugeniughelbur/obsidian-second-brain is maintained by eugeniughelbur. The last recorded GitHub activity is dated 2026-10-20, with 13 open issues.

Are there alternatives to obsidian-second-brain?

Yes. On ClaudeWave you can browse similar skills at /categories/skills, sorted by popularity or recent activity.

Project homepage
https://theaioperator.io