No Country for Old Text: Stop Wasting Your Context

Part of AI Product Engineering

Hosted by Bryan Bischof, Adam Conway, and Hamel Husain

Thu, Jul 23, 2026

9:30 PM UTC (1 hour)

Virtual (Zoom)

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AI Evals For Engineers & PMs
Hamel Husain and Shreya Shankar
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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

Bryan Bischof is currently Head of AI at Theory Ventures. He formerly led AI Engineering at Hex, where he spearheaded the development of Magic—the data science and analytics copilot. Bryan has worked all over the data stack leading teams in analytics, machine learning engineering, data platform engineering, and AI engineering. He started the data team at Blue Bottle Coffee, led several projects at Stitch Fix, and built the data teams at Weights and Biases. Bryan previously co-authored the book Building Production Recommendation Systems with O’Reilly, and teaches Data Science and Analytics in the graduate school at Rutgers. His Ph.D. is in pure mathematics.

Adam Conway

Senior AI Engineer at Theory Ventures

Adam Conway is a Senior AI Engineer at Theory Ventures, where he built Subtext. He has been a founding engineer at several startups and was previously a Staff Software Engineer at Modern Health, where he led work on authorization infrastructure and data pipelines. Earlier he built engineering projects at Stitch Fix and at Blue Bottle Coffee, where he wrote the company's first mobile app.

Hamel Husain

ML Engineer with 20+ years of experience

Hamel Husain is a ML Engineer with 20+ years of experience. He has worked with innovative companies such as Airbnb and GitHub, which included early LLM research used by OpenAI, for code understanding. He has also led and contributed to numerous popular open-source machine-learning tools. Hamel is currently an independent consultant helping companies build AI products.

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