Second Brain

AI-powered thought capture from Slack to Notion. Drop thoughts into a Slack channel and they're automatically classified and filed to the right Notion database.

Features

• Smart Classification: Uses AI to categorize thoughts into People, Projects, Ideas, or Admin
• Automatic Filing: Creates structured records in Notion with extracted fields
• Fix Command: Reply fix: [category] to correct misclassifications
• AI Digests: Daily and weekly summaries with actionable insights
• Scheduled Delivery: Automatic digest delivery at configurable times

How It Works

1. Post a thought to your designated Slack channel
2. The bot classifies it using AI and extracts relevant fields
3. A record is created in the appropriate Notion database
4. You get a confirmation reply with a link to the Notion page

Setup

Prerequisites

• Node.js 20+
• A Slack workspace where you can install apps
• A Notion workspace
• An Anthropic API key

1. Clone and Install

git clone https://github.com/brentrockwood/2b.git
cd 2b
npm install

2. Create Slack App

1. Go to api.slack.com/apps and create a new app
2. Enable Socket Mode and generate an App Token
3. Add these Bot Token Scopes:
   • channels:history - Read messages
   • chat:write - Send replies
   • app_mentions:read - Respond to @mentions
4. Install to Workspace and copy the Bot Token
5. Copy the Signing Secret from Basic Information

3. Create Notion Integration

1. Go to notion.so/my-integrations
2. Create a new integration and copy the token
3. Share your Notion databases with the integration

4. Configure Environment

cp .env.example .env
# Edit .env with your credentials

5. Create Notion Databases

npx tsx scripts/create-databases.ts

This creates the required databases and outputs the IDs to add to your .env.

6. Run

Development:

npm run dev

Production (Docker):

docker compose up -d

Usage

Capturing Thoughts

Just post to your inbox channel:

Had coffee with John, he's moving to Seattle next month

The bot will classify this as People and create a record with:

• Name: John
• Context: Had coffee, moving to Seattle
• Follow-ups: Check in about the move

Fixing Misclassifications

Reply in the thread:

fix: projects

Valid categories: people, projects, ideas, admin

Requesting Digests

Mention the bot:

@Second Brain digest daily
@Second Brain digest weekly

Configuration

Variable	Description	Default
SCHEDULE_ENABLED	Enable automatic digests	true
SCHEDULE_DAILY_CRON	Daily digest schedule	0 8 * * * (8am)
SCHEDULE_WEEKLY_CRON	Weekly digest schedule	0 8 * * 1 (Monday 8am)
SCHEDULE_TIMEZONE	Timezone for schedules	America/New_York
ANTHROPIC_MODEL	AI model to use	claude-sonnet-4-20250514

Development

npm run dev        # Run with hot reload
npm run build      # Compile TypeScript
npm run lint       # Run ESLint
npm test           # Run tests

License

MIT