Anthropic's official "Code with Claude" workshop materials — nine hands-on courses on skills, MCP, evals and Claude Managed Agents.
- official
- workshops
- anthropic
- managed-agents
AI Second Brain
A complete open guide plus vault template and agent skills: let an AI agent build and maintain a linked markdown knowledge base for you, in files you own.
AI Second Brain hands the boring filing work to an agent so the system stays alive: everything you read, watch and save becomes linked wiki pages connected to everything already there, and you can ask it questions. The repo is the full version of the guide — concepts, setup walkthroughs, the Obsidian vault template, the agent skills, the scripts and every vetted resource. Quick start is two cp -r commands (vault template to ~/brain, skills into its .claude directory), then open the folder as an Obsidian vault; an optional MCP setup lets the agent reach the vault from anywhere. Free, no signup, nothing to install beyond Obsidian and an agent. The premise is honest about why your past systems died: humans stop filing and linking after two weeks — an agent doesn't. MIT, with a searchable web edition on GitHub Pages.
What it does
- The agent does the filing: reads, watches and saves become linked wiki pages connected to everything already in the vault
- Complete package in one repo — concepts, setup guides, Obsidian vault template, agent skills, scripts and a vetted resource list
- Two-command quick start: cp -r the vault template to ~/brain and the skills into its .claude directory, then open it as an Obsidian vault
- Plain markdown you own — free, no signup, optional MCP connection for reaching the vault from anywhere; full searchable web edition on GitHub Pages
When to use it
Rebuilding a personal knowledge base that actually compounds — bookmarks, videos and read-later queues turned into linked pages an agent maintains and you can interrogate.
Getting started
git clone https://github.com/undefined-ui/second-brain-os.git # copy the starter vault, skills, commands and agents: cp -r second-brain-os/vault-template ~/brain cp -r second-brain-os/skills ~/brain/.claude/skills # install Obsidian, then open ~/brain with "Open folder as vault"
Things to know
Assumes Obsidian and a capable agent — the guide is the product, so expect reading and setup time rather than a one-click app. Vault quality follows your input habits: an agent maintains the links, but it can only file what you actually feed it.
Repository
undefined-ui/second-brain-osCharted
Related on the map
Anthropic's announcement of Fable 5.1 and Mythos 5.1 — one base model, two guardrail postures.
- official
- models
- announcement
- fable
Anthropic's canonical essay on agent design — workflows vs agents, and five composable patterns.
- official
- agents
- engineering
- patterns