Overview
Second Brain is a personal AI-powered workflow that captures, classifies, and summarizes learnings automatically. Send a quick Discord message on the go, and the system handles the rest: AI classifies it, Notion stores it in the right database, and a weekly digest arrives on Slack every Saturday.
The entire system runs 100% in the cloud on a self-hosted VPS. No local machine dependency, no execution limits, always on.
The Problem
A 1.5 to 2 hour commute each way meant hours of podcasts and dozens of insights every day. But by the time I reached home or office, half those learnings were gone. Context was lost.
Manually logging everything in Notion later was tedious, and I kept skipping it. I needed a system that captures knowledge at the moment of learning, not hours later.
The Solution
What if capturing a learning was as simple as sending a message?
That's the core idea. Send a Discord message, AI classifies it, Notion stores it, and a weekly summary arrives on Slack. Capture. Classify. Store. Summarize.
How It All Flows
Two automated workflows running 24/7 on a self-hosted VPS. Capture happens in seconds, summaries arrive every Saturday.
Key Design Decisions
- Discord for capture, Slack for delivery Discord is fast for quick mobile messages. Slack's block formatting is better for rich weekly summaries.
- Master DB as a safety net Every entry hits the Master Log regardless of classification confidence. Nothing is lost, ever.
- AI classifies, Notion stores Claude handles the thinking, Notion handles the storage. Clear separation of concerns.
- Self-hosted on a VPS Runs 24/7 without a laptop. Unlimited executions, full control, no vendor lock-in.
- Iterate, don't over-engineer Started with a single database. Added smart routing and weekly summaries as patterns emerged.