Stop losing the good part
Save the idea, not just the link.
A summary you can skim is easier to find and remember than a buried tab or a timestamp in your notes.
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Paste a YouTube video, podcast, or article and get a clean summary you can save, organize into lists, and actually come back to.
- 10 free summariesNo card required to start.
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Example summary · Mathematics · 11 min readTerence TaoTerence Tao: Hardest Problems in Mathematics, Physics & the Future of AI
Best mix of raw intellectual depth and long-term usefulness across math, physics, and AI.
Terence Tao presents mathematics as the study of models at the boundary between tractable and impossible, where progress often comes from identifying the right abstraction, ruling out tempting but doomed approaches, and finding deep connections across fields. He uses Kakeya, Navier-Stokes, prime number theory, Ricci flow, and formal proof systems to show that the hardest problems are less about raw computation than about discovering the right language for randomness, structure, and scale.
Read full summary →Why people keep using it
Saved links are where good ideas go to disappear.
The idea is simple: take something long, make it readable, and keep the good ones together so they stay useful.
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One place for everything you're studying.
Make a list for AI, startups, philosophy, or whatever you're digging into. Keep adding to it over time.
Share the short version
Send something people will actually open.
Share a readable summary instead of a two-hour video link. Let people decide if they want the full source.
How it works
Paste, read, save.
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Drop in any YouTube video, podcast page, or article.
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You get a structured, skimmable version with a link back to the original source.
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Lex Reading Room
Open a finished collection and see what a summary actually looks like. These are full reading editions built from standout conversations, designed to be skimmed, reread, and shared.
Mathematics11 min read
Terence Tao: Hardest Problems in Mathematics, Physics & the Future of AI
Terence Tao presents mathematics as the study of models at the boundary between tractable and impossible, where progress often comes from identifying the right abstraction, ruling out tempting but doomed approaches, and finding deep connections across fields. He uses Kakeya, Navier-Stokes, prime number theory, Ricci flow, and formal proof systems to show that the hardest problems are less about raw computation than about discovering the right language for randomness, structure, and scale.
Systems11 min read
John Carmack: Doom, Quake, VR, AGI, Programming, Video Games, and Rockets
John Carmack's core view is that breakthrough engineering comes from understanding systems end-to-end, optimizing for user value rather than elegance alone, and exploiting constraints to find "smoke and mirrors" solutions that make impossible-seeming experiences practical. He applies this lens across game engines, VR, programming languages, and AGI: progress usually comes from a small number of deep, pragmatic insights, not from maximal abstraction or philosophical theorizing.
Algorithms9 min read
Donald Knuth: Algorithms, Complexity, and The Art of Computer Programming
Knuth presents computer science as a craft of understanding across levels: from machine details to abstract theory, from formal proofs to human-readable exposition, and from worst-case analysis to practical performance. His core view is that progress comes from combining rigor, experimentation, taste, and humility about how little we truly understand.
Read the editorial notes
Short essays on how and why we built it this way.
Product Thinking6 min
Why a Good Summary Beats Speed-Watching
The point is not to watch faster. It is to keep the argument, the model, and the useful tension in a form you can recover later.
Open essayPricing5 min
How to Price AI Summaries Without Getting Weird
The clean version is simple: let people get to the first good result for free, then charge in a way that stays legible after every run.
Open essayCollaboration7 min
From Curated Shelf to Shared Research Room
Curated examples are the beginning. The more important move is letting people turn one strong shelf into a shared place for ongoing research.
Open essayYou already have something in mind
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