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YOUR AI SECOND BRAIN IS NOW OPEN SOURCE. khoj-ai just hit 36,000 stars on GitHub / For a solo founder, one agent replaces an entire corporate knowledge system. Connect your docs, PDFs, Obsidian notes, Notion pages. Claude, GPT, or a local model answers from your actual files, not the...

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14,416 views • 3 months ago •via X (Twitter)

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Karpathy sketched the second brain. these 7 open-source repos already built it for Obsidian + Claude Code 250,000+ GitHub stars between them, and every one is free to clone sorted by stars: 1. graphify - 134k stars turns your codebase, docs, SQL schemas and PDFs into one knowledge graph you can query ↳ 2. Understand-Anything - 88k stars maps any codebase into an interactive knowledge graph you can click through ↳ 3. claude-obsidian - 15.8k stars a second brain that organizes itself: drop in a source, Claude Code files it ↳ 4. obsidian-second-brain - 4.9k stars long-term memory for Claude Code, stored as plain markdown in your vault ↳ 5. mcp-obsidian - 4.5k stars one MCP server and Claude can read, search and write your whole vault ↳ 6. claudesidian - 2.6k stars a starter vault designed around Claude Code from the first note ↳ 7. second-brain - 756 stars an Obsidian wiki the model keeps up to date, built on Karpathy's LLM Wiki pattern ↳ where to start: > your knowledge lives in code -> graphify > your knowledge lives in Obsidian -> claude-obsidian > you just want Claude to remember -> obsidian-second-brain > you live in Claude Desktop -> mcp-obsidian the skills that sit on top of all seven are in the full map below ↓
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Karpathy sketched the second brain. these 7 open-source repos already built it for Obsidian + Claude Code 250,000+ GitHub stars between them, and every one is free to clone sorted by stars: 1. graphify - 134k stars turns your codebase, docs, SQL schemas and PDFs into one knowledge graph you can query ↳ 2. Understand-Anything - 88k stars maps any codebase into an interactive knowledge graph you can click through ↳ 3. claude-obsidian - 15.8k stars a second brain that organizes itself: drop in a source, Claude Code files it ↳ 4. obsidian-second-brain - 4.9k stars long-term memory for Claude Code, stored as plain markdown in your vault ↳ 5. mcp-obsidian - 4.5k stars one MCP server and Claude can read, search and write your whole vault ↳ 6. claudesidian - 2.6k stars a starter vault designed around Claude Code from the first note ↳ 7. second-brain - 756 stars an Obsidian wiki the model keeps up to date, built on Karpathy's LLM Wiki pattern ↳ where to start: > your knowledge lives in code -> graphify > your knowledge lives in Obsidian -> claude-obsidian > you just want Claude to remember -> obsidian-second-brain > you live in Claude Desktop -> mcp-obsidian the skills that sit on top of all seven are in the full map below ↓

Mr. Buzzoni

30,515 views • 15 days ago

Cabinet: local AI knowledge base. Plain Markdown files on your machine. No lock-in. (Imagine if Paperclip + Obsidian made a baby) AI workforce - your data + your agents, one place, locally, yours.
0:47

Cabinet: local AI knowledge base. Plain Markdown files on your machine. No lock-in. (Imagine if Paperclip + Obsidian made a baby) AI workforce - your data + your agents, one place, locally, yours.

Hila Shmuel

46,945 views • 7 months ago

Obsidian CEO actually released the skill that lets your AI agent run your entire vault for you. It's called obsidian-skills. Install it into Claude Code, Codex, or OpenCode, and your agent can read, create, search, and organize notes directly, plus handle Markdown, Bases, and Canvas files without you touching a thing. This is the missing piece for an AI second brain. Your notes live in Obsidian, and now the agent actually knows how to work them. Want the full picture? We broke down how to build a complete AI second brain from scratch in the article below.
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Obsidian CEO actually released the skill that lets your AI agent run your entire vault for you. It's called obsidian-skills. Install it into Claude Code, Codex, or OpenCode, and your agent can read, create, search, and organize notes directly, plus handle Markdown, Bases, and Canvas files without you touching a thing. This is the missing piece for an AI second brain. Your notes live in Obsidian, and now the agent actually knows how to work them. Want the full picture? We broke down how to build a complete AI second brain from scratch in the article below.

Simplifying AI

68,025 views • 3 months ago

I still don’t understand why people keep building a Claude second brain by hand when these 10 repos already built the whole system They turn your Claude sessions into a wiki, let Claude read and write your vault from your phone, and one of them comes straight from Obsidian’s own CEO 01 llm-wiki → your Claude Code and Codex sessions become a searchable wiki, with an MCP server to query it 02 llm-wiki-claude-skill → one skill file teaches Claude to ingest sources, answer from them, lint the wiki and compile it into clean pages 03 obsidian-skills → Obsidian’s own CEO teaches Claude how Obsidian really works 04 llm-wiki → a Claude Code plugin with init, ingest, compile, query and lint, where every change is committed to git 05 obsidian-dev-second-brain → your tickets, sprints and project docs live in the vault as notes, and Claude keeps them in sync with the code 06 obsidian-mcp-server → 14 tools to read, write, search and surgically edit notes, tags and frontmatter 07 mcpvault → safe vault access with a read-only mode, and Obsidian doesn’t even need to be running 08 obsidian-claude-code-mcp → connect Claude Code to your open vault with one /ide command 09 obsidian-web-mcp → reach your vault from your phone or any MCP client, with OAuth and a Cloudflare Tunnel 10 obsidian-mcp → a git-backed vault with 18 tools, running locally or on AWS Lambda Nobody is going to build your second brain for you, and every chat you close without one is knowledge thrown away. Bookmark this, pick one repo from 01 to 05 and ingest your first source tonight. A month from now you have a wiki, and everyone who skipped it is still opening a blank chat.
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I still don’t understand why people keep building a Claude second brain by hand when these 10 repos already built the whole system They turn your Claude sessions into a wiki, let Claude read and write your vault from your phone, and one of them comes straight from Obsidian’s own CEO 01 llm-wiki → your Claude Code and Codex sessions become a searchable wiki, with an MCP server to query it 02 llm-wiki-claude-skill → one skill file teaches Claude to ingest sources, answer from them, lint the wiki and compile it into clean pages 03 obsidian-skills → Obsidian’s own CEO teaches Claude how Obsidian really works 04 llm-wiki → a Claude Code plugin with init, ingest, compile, query and lint, where every change is committed to git 05 obsidian-dev-second-brain → your tickets, sprints and project docs live in the vault as notes, and Claude keeps them in sync with the code 06 obsidian-mcp-server → 14 tools to read, write, search and surgically edit notes, tags and frontmatter 07 mcpvault → safe vault access with a read-only mode, and Obsidian doesn’t even need to be running 08 obsidian-claude-code-mcp → connect Claude Code to your open vault with one /ide command 09 obsidian-web-mcp → reach your vault from your phone or any MCP client, with OAuth and a Cloudflare Tunnel 10 obsidian-mcp → a git-backed vault with 18 tools, running locally or on AWS Lambda Nobody is going to build your second brain for you, and every chat you close without one is knowledge thrown away. Bookmark this, pick one repo from 01 to 05 and ingest your first source tonight. A month from now you have a wiki, and everyone who skipped it is still opening a blank chat.

Ryven

10,722 views • 6 days ago

The quality of your AI outputs = the quality of the context you feed it. Here’s the easiest upgrade most people miss: Connect your Obsidian vault to your AI agents. Now your agents can: read your research understand your business track your goals spot content gaps write assets from your own notes No APIs. No setup headaches. Just local markdown files powering smarter agents.
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The quality of your AI outputs = the quality of the context you feed it. Here’s the easiest upgrade most people miss: Connect your Obsidian vault to your AI agents. Now your agents can: read your research understand your business track your goals spot content gaps write assets from your own notes No APIs. No setup headaches. Just local markdown files powering smarter agents.

Julian Goldie SEO

18,054 views • 7 months ago

This is f*cking gold. One repo from Obsidian’s CEO teaches agents how your vault works. 10 more give them memory, search and everything you save 01 obsidian-skills → teaches Claude Code, Codex and other agents to write notes, bases and canvases in your vault the way Obsidian expects 02 obsidian-copilot → runs Claude Code, Codex and OpenCode inside your vault, local models included 03 supermemory → remembers facts about you, rewrites the ones you contradict and drops the ones that expire 04 khoj → ask your notes, PDFs and the web one question, on your own server 05 obsidian-smart-connections → finds the notes you forgot you wrote while you type, no API key needed 06 karakeep → saves anything, tags it with AI and finds it later, on your own server 07 siyuan → you and your AI agents edit the same notes on your own server 08 zk → a plain-text wiki you run from the terminal 09 silverbullet → Markdown notes you can program with Lua 10 memos → quick notes on a timeline, found by search, tag or date 11 trilium → notes in a hierarchy big enough for a whole personal knowledge base
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This is f*cking gold. One repo from Obsidian’s CEO teaches agents how your vault works. 10 more give them memory, search and everything you save 01 obsidian-skills → teaches Claude Code, Codex and other agents to write notes, bases and canvases in your vault the way Obsidian expects 02 obsidian-copilot → runs Claude Code, Codex and OpenCode inside your vault, local models included 03 supermemory → remembers facts about you, rewrites the ones you contradict and drops the ones that expire 04 khoj → ask your notes, PDFs and the web one question, on your own server 05 obsidian-smart-connections → finds the notes you forgot you wrote while you type, no API key needed 06 karakeep → saves anything, tags it with AI and finds it later, on your own server 07 siyuan → you and your AI agents edit the same notes on your own server 08 zk → a plain-text wiki you run from the terminal 09 silverbullet → Markdown notes you can program with Lua 10 memos → quick notes on a timeline, found by search, tag or date 11 trilium → notes in a hierarchy big enough for a whole personal knowledge base

Ryven

12,530 views • 8 days ago

CLAUDE JUST TURNED OBSIDIAN INTO A BRAIN THAT NEVER FORGETS (FOR $0) Someone connected Claude straight to their Obsidian vault. Now the AI reads and writes every note they own. Every client, every idea, every project. Instant recall. Runs on Claude + Obsidian. One evening. Zero code. The numbers are insane: - Notion AI: $10/month forever - A "second brain" course: $500 to $2,000 - An assistant to organize your notes: $3,000/month - This setup: $0 - Time to build: one evening - Skill required: copy the steps The opportunity is even wilder: People sell Notion "second brain" templates for $99 to $499. You just built something better for free, and it never forgets. One free vault can hold the entire memory of your business: clients, content, SOPs, ideas. One person + Claude + Obsidian + one evening = an infinite memory that never forgets. Save and watch the clip.
13:03

CLAUDE JUST TURNED OBSIDIAN INTO A BRAIN THAT NEVER FORGETS (FOR $0) Someone connected Claude straight to their Obsidian vault. Now the AI reads and writes every note they own. Every client, every idea, every project. Instant recall. Runs on Claude + Obsidian. One evening. Zero code. The numbers are insane: - Notion AI: $10/month forever - A "second brain" course: $500 to $2,000 - An assistant to organize your notes: $3,000/month - This setup: $0 - Time to build: one evening - Skill required: copy the steps The opportunity is even wilder: People sell Notion "second brain" templates for $99 to $499. You just built something better for free, and it never forgets. One free vault can hold the entire memory of your business: clients, content, SOPs, ideas. One person + Claude + Obsidian + one evening = an infinite memory that never forgets. Save and watch the clip.

shmidt

57,347 views • 4 months ago

I can’t f*cking believe people still aren’t using this: Obsidian’s own CEO and team open-sourced the tools that make Claude work inside your vault, and they’re all free -> obsidian skills (by kepano) Obsidian’s CEO teaches Claude to write real Obsidian files: Markdown with wikilinks, Bases and Canvas, plus the Obsidian CLI -> defuddle (by kepano) strips any web page down to clean Markdown, so Claude reads the article and not the sidebars, and burns fewer tokens doing it -> obsidian importer (by obsidianmd) moves your whole history from Notion, Evernote, Apple Notes, Roam, Bear and OneNote into Markdown, so your agent can finally read it -> obsidian help (by obsidianmd) the official Obsidian docs as plain Markdown with an AGENTS.md file, so your agent learns Obsidian from the source -> obsidian clipper (by obsidianmd) the official web clipper that saves any page straight into your vault pick one, install it tonight and your Claude writes real Obsidian files from the first prompt bookmark it before it gets buried
0:26

I can’t f*cking believe people still aren’t using this: Obsidian’s own CEO and team open-sourced the tools that make Claude work inside your vault, and they’re all free -> obsidian skills (by kepano) Obsidian’s CEO teaches Claude to write real Obsidian files: Markdown with wikilinks, Bases and Canvas, plus the Obsidian CLI -> defuddle (by kepano) strips any web page down to clean Markdown, so Claude reads the article and not the sidebars, and burns fewer tokens doing it -> obsidian importer (by obsidianmd) moves your whole history from Notion, Evernote, Apple Notes, Roam, Bear and OneNote into Markdown, so your agent can finally read it -> obsidian help (by obsidianmd) the official Obsidian docs as plain Markdown with an AGENTS.md file, so your agent learns Obsidian from the source -> obsidian clipper (by obsidianmd) the official web clipper that saves any page straight into your vault pick one, install it tonight and your Claude writes real Obsidian files from the first prompt bookmark it before it gets buried

Ryven

38,829 views • 3 days ago

Introducing 𝙾𝚙𝚎𝚗 𝚃𝚎𝚊𝚌𝚑 Better Claude Teach that works with any agent, any model, and with your own data. Features: -> Embed Open Teach into your own custom agents -> Learn from in-browser activity and from agent interactions -> Self-hosted for full data sovereignty -> Future proof and cross-stack Get early access:
0:30

Introducing 𝙾𝚙𝚎𝚗 𝚃𝚎𝚊𝚌𝚑 Better Claude Teach that works with any agent, any model, and with your own data. Features: -> Embed Open Teach into your own custom agents -> Learn from in-browser activity and from agent interactions -> Self-hosted for full data sovereignty -> Future proof and cross-stack Get early access:

Atai Barkai

38,882 views • 3 months ago

🎉 Introducing OpenMausBot An open-source, self-hostable team of AI agents, not another boxed-in assistant. • Computer use: browser, terminal, files & a real desktop • Connectors for the apps you already live in • Goals, routines & progress that keep moving • Built for mobile and web Works with Claude , ChatGPT , Grok , Cursor , Nous Research , Qwen , Kimi.ai , and any harness or model you have. Your bots. Your machine. Your keys. Repo →
1:37

🎉 Introducing OpenMausBot An open-source, self-hostable team of AI agents, not another boxed-in assistant. • Computer use: browser, terminal, files & a real desktop • Connectors for the apps you already live in • Goals, routines & progress that keep moving • Built for mobile and web Works with Claude , ChatGPT , Grok , Cursor , Nous Research , Qwen , Kimi.ai , and any harness or model you have. Your bots. Your machine. Your keys. Repo →

Omkar Satpute

157,756 views • 1 month ago

AI agents are only as powerful as the content they can access. Anthropic announced Dispatch in Claude Cowork — assign tasks from your phone, let Claude navigate your computer, get complex work done autonomously. But without a file system built for AI, even the most capable agent is working blind. Connect Claude Cowork to Box and your files become the foundation it reasons from. Is your content infrastructure ready for AI agents?
0:52

AI agents are only as powerful as the content they can access. Anthropic announced Dispatch in Claude Cowork — assign tasks from your phone, let Claude navigate your computer, get complex work done autonomously. But without a file system built for AI, even the most capable agent is working blind. Connect Claude Cowork to Box and your files become the foundation it reasons from. Is your content infrastructure ready for AI agents?

Box

432,932 views • 7 months ago

Andrej Karpathy quietly shipped the best second brain idea in years not an app. a pattern. let an llm maintain a wiki of your notes. you dump sources, it reads them, links them, files them. knowledge compounds like interest. someone built it into a free claude code plugin. setup is two commands: claude plugin marketplace add AgriciDaniel/claude-obsidian claude plugin install claude-obsidian@agricidaniel-claude-obsidian then open obsidian, open claude code in the same folder, type /wiki. that's it. your notes are now queryable by claude and they get richer every time you read something. bookmark this. best thing you'll build this weekend.
0:42

Andrej Karpathy quietly shipped the best second brain idea in years not an app. a pattern. let an llm maintain a wiki of your notes. you dump sources, it reads them, links them, files them. knowledge compounds like interest. someone built it into a free claude code plugin. setup is two commands: claude plugin marketplace add AgriciDaniel/claude-obsidian claude plugin install claude-obsidian@agricidaniel-claude-obsidian then open obsidian, open claude code in the same folder, type /wiki. that's it. your notes are now queryable by claude and they get richer every time you read something. bookmark this. best thing you'll build this weekend.

Avid

339,848 views • 4 months ago

EVERYONE IS BUILDING CUSTOM GPTS BUT ALMOST NOBODY IS TRAINING THEIR OWN MODEL FROM SCRATCH $100 and one weekend is all it takes with andrej karpathy’s nanochat you pretrain a gpt-2 grade base model on 400 billion tokens of web text, then fine-tune it on your own obsidian notes, your ai chat history, your writing it answers in your voice, recalls your own ideas, runs locally with no api and no subscriptions complete builder’s guide with every command in the article ↓
1:49

EVERYONE IS BUILDING CUSTOM GPTS BUT ALMOST NOBODY IS TRAINING THEIR OWN MODEL FROM SCRATCH $100 and one weekend is all it takes with andrej karpathy’s nanochat you pretrain a gpt-2 grade base model on 400 billion tokens of web text, then fine-tune it on your own obsidian notes, your ai chat history, your writing it answers in your voice, recalls your own ideas, runs locally with no api and no subscriptions complete builder’s guide with every command in the article ↓

leopardracer

15,859 views • 4 months ago

OpenResearch CLI runs the entire autoresearch loop locally — give it a goal, it handles literature review through experiment analysis with parallel agents in separate worktrees. Works with Claude Code, Codex, and OpenCode. Your data never leaves your machine. Research just became something you run overnight. GitHub:
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OpenResearch CLI runs the entire autoresearch loop locally — give it a goal, it handles literature review through experiment analysis with parallel agents in separate worktrees. Works with Claude Code, Codex, and OpenCode. Your data never leaves your machine. Research just became something you run overnight. GitHub:

0xMarioNawfal

45,698 views • 2 months ago

IMAGINE TELLING YOUR AI AGENT "BOOK ME AN UBER" AND IT ACTUALLY DOES IT not from a script. from a real iphone. phoneuse just gave agents their own phone in the cloud. uber, tiktok, whatsapp, your bank. everything you use.
0:30

IMAGINE TELLING YOUR AI AGENT "BOOK ME AN UBER" AND IT ACTUALLY DOES IT not from a script. from a real iphone. phoneuse just gave agents their own phone in the cloud. uber, tiktok, whatsapp, your bank. everything you use.

liam.

18,349 views • 19 days ago

The AI agent named itself during setup. AgenC is an open source agent that runs on your own machine. Works best with Grok. 15 minutes to a named agent on your phone with a $2/day spending cap.
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The AI agent named itself during setup. AgenC is an open source agent that runs on your own machine. Works best with Grok. 15 minutes to a named agent on your phone with a $2/day spending cap.

tetsuo

10,987 views • 4 months ago

Meet June: your private AI agent now with local models on your Mac. Turn the wifi off: Agent, dictation, meeting notes, and your files all in one workspace. 100% free to use with local inference. Open Source. MIT. Local first. Try it:
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Meet June: your private AI agent now with local models on your Mac. Turn the wifi off: Agent, dictation, meeting notes, and your files all in one workspace. 100% free to use with local inference. Open Source. MIT. Local first. Try it:

OpenSoftware

17,471 views • 4 months ago

introducing XERJ Corpus Hub, reference memory for AI agents. give your agent a corpus for your task. watch it become superintelligent. > finds the answers in indexed expert knowledge > applies them to your code, research, and projects > works with any model. free and OSS forever/Apache 2 install in one prompt: >Install XERJ (docs: index this project’s sources, docs, and logs, and connect as reference memory hub
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introducing XERJ Corpus Hub, reference memory for AI agents. give your agent a corpus for your task. watch it become superintelligent. > finds the answers in indexed expert knowledge > applies them to your code, research, and projects > works with any model. free and OSS forever/Apache 2 install in one prompt: >Install XERJ (docs: index this project’s sources, docs, and logs, and connect as reference memory hub

Ivan Novikov

84,104 views • 27 days ago

Introducing Run open source AI models locally in your browser, in just a few clicks. Pick an opensource model or load any model from Hugging Face. It downloads to your machine and runs there privately; every prompt stays on your device. Get your free personal AI today.
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Introducing Run open source AI models locally in your browser, in just a few clicks. Pick an opensource model or load any model from Hugging Face. It downloads to your machine and runs there privately; every prompt stays on your device. Get your free personal AI today.

Gratis

128,777 views • 7 days ago

Your AI agents can now master entire tech stacks, not just single tools. Introducing batch mode for HyperSkill. Auto-generate dozens of SKILL. md files at once from live docs. so your agents can master complete ecosystems, not just single tools. Open-source & powered by Hyperbrowser ↓
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Your AI agents can now master entire tech stacks, not just single tools. Introducing batch mode for HyperSkill. Auto-generate dozens of SKILL. md files at once from live docs. so your agents can master complete ecosystems, not just single tools. Open-source & powered by Hyperbrowser ↓

Hyperbrowser

27,452 views • 8 months ago