Free Lesson
No Country for Old Text: Stop Wasting Your Context
Part of AI Product Engineering
60 min
Jul 23, 2026 5:30 PM
Virtual (Zoom)
In this video
What you'll learn
Attach intent, ownership, and trust to each sentence
Subtext is a new, open file format. It keeps notes on each sentence, like why you wrote it and who it belongs to. Those notes stay with the document, so anyone can check where a claim came from.
Make your context travel across tools
When your work moves from one app to another, the reasons behind it get lost. You'll learn how to keep those reasons with the text, so they stay even after AI rewrites it.
Try it in your own workflow
You'll see the free, open tool used on real docs and code. Then you can start keeping this context in the files your team already shares.
Why this topic matters
AI-generated research or analysis is worthless if you can't trust what it tells you. Normally, there's no easy way to track why each part was written or who authored it. Bryan and Adam from Theory built Subtext, a new open file format that keeps this context attached to the text. They'll show you how it works and how to use it.
You'll learn from
Bryan Bischof
Head of AI at Theory Ventures
Adam Conway
Senior AI Engineer at Theory Ventures
Hamel Husain
ML Engineer with 20+ years of experience