Textbook becomes mind map, before you even finish reading.

BrainLattice maps the lattice structure of knowledge onto your brain's neural network. Learning designed for how the mind actually works.

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Overview

Traditional learning forces linear consumption of non-linear information. BrainLattice flips this paradigm by transforming static PDF textbooks into interactive, explorable knowledge graphs. It uses LLMs to extract core concepts, identify relationships, and generate high-fidelity study materials, allowing users to understand the "system" of a subject before memorizing the details.

Key Features

• Obsidian-like Knowledge Graph - Spatially explore concepts. Cmd + Shift + Click to drill down into formulas, theorems, and prerequisites.
• Contextual Synthesis - Auto-generates study guides and entity summaries from raw text.
• Audio Briefs - Converts synthesized notes into podcast-style audio via Fish Audio.
• Universal Input - Works with any text-heavy PDF: textbooks, research papers, lecture notes.

Tech Stack

• FastAPI + Next.js
• Google Gemini 2.5 Flash - Concept extraction & graph topology.
• Grok 4 (OpenRouter) - Summarization & synthesis.
• Fish Audio - Low-latency and cost-effective TTS.
• React Force Graph - WebGL-powered visualization.
• Firebase - Real-time data & auth.

Getting Started

Prerequisites

• Python 3.10+
• Node.js 18+
• Fish Audio API Key
• Google Gemini API Key
• OpenRouter API Key
• Firebase Service Account

Installation

1. Backend Setup

   cd backend
   pip install -r requirements.txt
   uvicorn main:app --reload

   Server runs at http://localhost:8000

2. Frontend Setup

   cd frontend
   npm install
   npm run dev

   App runs at http://localhost:3000

Configuration (backend/.env)

GEMINI_API_KEY=your_gemini_key
OPENROUTER_API_KEY=your_openrouter_key
FISH_AUDIO_API_KEY=your_fish_audio_key
FIREBASE_SERVICE_ACCOUNT_PATH=secrets/firebase_private.json

How It Works

1. Ingestion: PyPDF extracts raw text from uploaded documents.
2. Synthesis: Grok 4 (via OpenRouter) identifies sequential concepts.
3. Mapping: Gemini 2.5 constructs the hierarchical knowledge graph.
4. Generation: The system produces study guides and audio scripts.
5. Audio: Scripts are streamed to Fish Audio for TTS generation.

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