Applied AI

Brain2, a Claude-Powered Second Brain

My personal knowledge system, run by Claude. An Obsidian vault where an AI agent processes everything I capture: it files and links notes, logs decisions and meetings, and collects status reports from project agents working in other repos. Every change is auto-committed to git, so the vault maintains itself while I just talk to it.

Brain2 — vault graph / agent session screenshot

Overview

Brain2 is my answer to scattered notes and forgotten context: a git-backed Obsidian vault operated by Claude as a knowledge partner. A CLAUDE.md operating manual teaches the agent how the vault works: where content routes, which templates to use, and when to capture. Anything dropped in the inbox gets read, cleaned, classified, and filed with wiki links. Anything worth keeping from conversation gets captured proactively, without being asked. Project agents working in separate repos report status back into the vault, making it the hub for everything I build.

Key Outcomes

175+interlinked notes under active management

9projects reporting status into the vault hub

100%of changes versioned through automated git commits

Technologies

Claude CodeObsidianGit + GitHubMCP (Gmail, Calendar, Drive)shell hooks + automation

Technical Highlights

✶CLAUDE.md operating manual: routing table, templates, tagging conventions, and note lifecycle the agent follows every session

✶Automated inbox: anything dropped into the ingest folder is read, cleaned, classified, filed, and archived

✶Proactive capture: facts shared in conversation are saved and linked without being asked

✶Project hub pattern: subagents in other repos write status reports back into the vault

✶Session hooks for attachment auto-sorting, git hygiene checks, and auto-commit on every unit of work

✶MCP integrations let the agent pull context from email, calendar, and cloud files while filing knowledge

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