# Claude Code + Obsidian: The AI Second Brain Playbook
Build Your AI's Long Term Memory in a Weekend

- Price: $12.99 (Kindle ebook)
- Level: Beginner
- Pages: 220
- Best for: Claude users tired of re-explaining their work
- You finish with: A vault Claude actually reads: 5 folders, 5 hooks, 3 subagents
- Series: AI Memory Playbooks, book 1 of 4
- Buy on Amazon: https://amzn.to/3PbZ9yV
- Web page: https://youcanbuildthings.com/books/claude-obsidian-second-brain

## What you get

Stop re-explaining your work to Claude every morning. Ship the 5-folder vault, the CLAUDE.md that sticks, five lifecycle hooks, and three subagents in a weekend.

You open Claude Code. It forgets what you decided yesterday. It doesn't know your project structure. Again. This is the working playbook for an Obsidian vault Claude actually reads: the 5-folder schema, the CLAUDE.md that survives long sessions, the five lifecycle hooks that re-inject context every prompt, and the three subagents that scale past 2,000 notes. Ship the vault on Saturday. By Sunday, your CLAUDE.md sticks. By next weekend, your AI remembers everything.

## Chapters

1. The Memory of a Goldfish: Why every Claude session starts from zero, and what changes when you give it a vault.
2. Why Your Vault Becomes a Junk Drawer: The 5-folder schema that prevents the 2,000-note failure mode.
3. Karpathy's Trick: The three layers (Raw, Wiki, Schema) that started the whole wave.
4. Your 5-Folder Vault, In One Sitting: Install Claude Code + Obsidian, ship the schema, run the smoke test.
5. The CLAUDE.md That Doesn't Get Ignored: Seven sections, 80-150 lines, in the load order Claude actually follows.
6. Five Hooks That Make CLAUDE.md Stick: SessionStart, UserPromptSubmit, PostToolUse, PreCompact, Stop, wired with handler scripts.
7. Skills That Pay Rent: /capture, /daily, /plan, /process-inbox, /weekly-review as five named workflows.
8. Three Subagents That Pay Rent: brag-spotter, slack-archaeologist, cross-linker. Isolated contexts, three Friday runs, fifteen minutes.
9. Your Role, Your Vault: PM, founder, freelancer, knowledge worker. Same five folders, four daily rituals.
10. Memory at 2,000 Notes: Three retrieval tiers and the Ollama + obsidian-copilot setup that handles the middle band.
11. When It Breaks, And the 20-Minute Diagnostic: Four maintenance failure modes and the printable diagnostic that catches them early.
12. Ship the Next 30 Days: A week-by-week calendar that takes you from goldfish to working memory in 30 days.

## Free guides from this book

- [Five Claude Code Lifecycle Hooks for Your Obsidian Vault](https://youcanbuildthings.com/articles/claude-code-lifecycle-hooks-sessionstart.md): Configure five Claude Code lifecycle hooks (SessionStart, UserPromptSubmit, PostToolUse, PreCompact, Stop) that load and re-inject vault context every prompt.
- [How to Build a 5-Folder Obsidian Vault for Claude Code](https://youcanbuildthings.com/articles/claude-code-obsidian-vault-structure.md): Ship the Obsidian vault structure Claude Code uses as primary context: five folders, install commands, and the smoke test that proves the loop in 60 minutes.
- [Local Semantic Search for an Obsidian Vault with Ollama](https://youcanbuildthings.com/articles/obsidian-semantic-search-ollama.md): Set up obsidian semantic search with Ollama and obsidian-copilot in 20 minutes. Local embeddings, no data leaves your machine, three-tier retrieval ladder.
- [The 7-Section CLAUDE.md Template for an Obsidian Vault](https://youcanbuildthings.com/articles/claude-md-obsidian-vault-template.md): A CLAUDE.md Obsidian vault template that survives long sessions: identity, folder schema, active projects, decision log, anti-patterns, sized 80-150 lines.
- [Three Claude Code Subagents for an Obsidian Vault](https://youcanbuildthings.com/articles/claude-code-subagents-obsidian-vault.md): Three Claude Code subagents (brag-spotter, slack-archaeologist, cross-linker) for an Obsidian vault: isolated contexts, three Friday runs, fifteen minutes.