AI Knowledge Repository
The Library of
Alexandria for AI
Explore ideas across science, technology, philosophy and more. A growing library of knowledge packs for humans and AI agents.
- Preserved packs
- 55
- Knowledge domains
- 50
- Catalog access
- Free
From the collection
Start with a little wonder.
Large Language Models: Fundamentals
AI & Machine LearningClassical & Modern Physics Fundamentals
PhysicsPhilosophy: Ethics, Logic & Critical Thinking
PhilosophySoftware Engineering Patterns
Computer ScienceWorld History: Major Events & Civilizations
HistoryApplied Mathematics Essentials
MathematicsEvery subject, a doorway.
The catalog is open. Recovery continues.
Browse, search, read and download 55 preserved knowledge packs across 50 original topics. These are the original catalog files, with their content kept intact.
Hosted book summaries, personal libraries and saved notes remain unavailable while the database is offline. They are separate from this collection. Additional prepared material is still awaiting review.
Questions, answered.
What is CodexLib?
CodexLib is a library of knowledge packs across science, technology, philosophy and more, for humans and AI agents. It currently serves 55 preserved packs across 50 knowledge domains from its original catalog.
What is in a knowledge pack?
Each pack page shows the preserved pack text, its original Rosetta decoder and the exact source file SHA-256, and links to the exact original pack JSON. Packs are preserved pack text, not verified reconstructions of complete books.
Is CodexLib free?
Yes. Browsing, reading and downloading the original catalog is free and needs no account.
What is unavailable right now?
Hosted book summaries, personal libraries, saved notes, accounts, pricing and the API are unavailable while the database is offline. They are separate from this collection.