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Introduction

Project Nexus is an open-source, privacy-first knowledge management system. It automatically captures web content, generates AI summaries, builds a visual knowledge graph, and helps you retain everything through spaced repetition — all while keeping your data under your complete control.

"Your Second Brain. Not Big Tech's."

What is Project Nexus?​

Project Nexus consists of two parts:

  1. Browser Extension — A Plasmo-based Chrome extension that captures articles and YouTube transcripts with a single click, processes them with AI using your own API key, and stores the results to your personal database.

  2. Web Dashboard — A Next.js application where you view, organize, and interact with your captured knowledge through a feed, a visual graph, spaced repetition reviews, and an AI memory agent.

Core Features​

FeatureDescription
Intelligent CaptureScrapes article text or YouTube transcripts and generates AI summaries and entity tags.
Knowledge GraphAuto-links related nodes using vector embeddings. Visualized on a 2D canvas with React Flow.
Spaced RepetitionDaily review queue based on the SuperMemo-2 (SM-2) algorithm to maximize retention.
Memory AgentBackground AI consolidation of your captured knowledge into overarching themes.
CollectionsOrganize captured nodes into custom, named collections with bulk operations.
Virtualized FeedSmooth, performant scrolling even with tens of thousands of nodes.
BYOK PrivacyAll AI calls go directly from your browser to your chosen LLM provider. Nothing routes through our servers.

Who Is This For?​

  • Researchers and students who want to build a personal knowledge base from articles and videos.
  • Developers and engineers who want full control over their data and AI pipeline.
  • Knowledge workers who want a tool that actually helps them retain what they read.

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