second-brain

A personal knowledge system built on a video/article extraction pipeline and an LLM-maintained wiki (inspired by the Karpathy LLM Wiki pattern).

What it does

1. Pull — download YouTube videos or fetch web articles
2. Transcribe — extract transcripts via Whisper (videos) or trafilatura (articles)
3. Extract — single-shot Claude call produces structured notes per source
4. Review — web UI to accept or reject extractions
5. Compile — wiki compiler folds accepted extractions into a living Obsidian vault

Quick start

# Install dependencies
uv sync

# Copy and edit config
cp config/settings.toml config/settings.local.toml

# Queue a source
uv run second-brain add https://www.youtube.com/watch?v=...

# Run the pipeline
uv run second-brain process

# Review in the web UI
uv run second-brain serve

# Compile to wiki
uv run second-brain compile

Domains

Extractions are tagged by domain so the right prompt template is used:

Domain	Focus
development	Software, programming, systems
content	Content creation, video production
business	Entrepreneurship, marketing, ops
homelab	Self-hosted infra, networking, DevOps

Requirements

• Python 3.12+
• ANTHROPIC_API_KEY environment variable
• ffmpeg (for Whisper audio extraction)