🧠 Second Brain

A personal knowledge base and project management tool built with Next.js.

Features

📄 Documents

• Markdown documents with frontmatter support
• Full-text search across all documents
• Tag-based filtering and categorization
• Download documents as .md files
• Responsive design with mobile sidebar

📋 Projects (Kanban Board)

• Create and manage multiple projects
• Drag-and-drop task management
• 5-column workflow: Backlog → To Do → In Progress → Review → Done
• Task priorities (Low, Medium, High)
• Tags and due dates
• Local storage persistence

Getting Started

Prerequisites

• Node.js 18+
• npm or yarn

Installation

# Install dependencies
npm install

# Run development server
npm run dev

# Build for production
npm run build

# Start production server
npm start

Adding Documents

Place markdown files in the documents/ directory with frontmatter:

---
title: "My Document Title"
tags: [notes, ideas]
date: 2026-02-05
---

# Content here

Your markdown content...

Available Tags

• journal - Daily journal entries
• notes - General notes
• newsletters - Newsletter drafts
• scripts - Video/content scripts
• ideas - Ideas and brainstorms
• concepts - Framework and concept docs
• dirt-roamers - Dirt Roamers business docs
• email-sequences - Email sequence templates
• sales - Sales-related content

Project Structure

second-brain/
├── documents/           # Markdown documents
├── src/
│   ├── app/
│   │   ├── api/
│   │   │   └── documents/
│   │   │       └── route.ts    # Documents API
│   │   ├── projects/
│   │   │   └── page.tsx        # Kanban board page
│   │   ├── globals.css         # Global styles
│   │   ├── layout.tsx          # Root layout with header
│   │   └── page.tsx            # Documents page
│   ├── components/
│   │   ├── Header.tsx          # Navigation header
│   │   ├── KanbanBoard.tsx     # Kanban board component
│   │   └── index.ts            # Component exports
│   └── lib/
│       └── documents.ts        # Document utilities
├── package.json
└── README.md

Navigation

• 📄 Documents (/) - Browse and search markdown documents
• 📋 Projects (/projects) - Kanban board for project management

Tech Stack

• Framework: Next.js 16
• Styling: Tailwind CSS 4
• Markdown: react-markdown with remark-gfm
• State: React hooks + localStorage
• TypeScript: Full type coverage with JSDoc documentation

API

GET /api/documents

Returns all documents and tags.

interface Response {
  documents: Document[];
  tags: string[];
}

interface Document {
  slug: string;
  title: string;
  content: string;
  tags: string[];
  date: string;
  excerpt: string;
}

Local Storage

The Kanban board persists data to localStorage under the key second-brain-kanban:

interface StoredData {
  projects: Project[];
  activeProjectId: string | null;
}

Development

# Lint code
npm run lint

# Type check
npx tsc --noEmit

License

Private - All rights reserved