---
title: "Comment by Yunus Emre Vurgun on \"HTML is the new Markdown. Your agent reads a different page\" | Hashnode"
description: "The point that the agent and the human can read different versions of the same page is the part people underrate. A cheap check is to log a hash of the exact te"
url: "https://hashnode.com/posts/the-page-your-agent-reads/6ad3f83669a965c237b00933/comment/6ad458b2071e17eeebe46fc2"
---

[Discussion](https://hashnode.com/posts/the-page-your-agent-reads/6ad3f83669a965c237b00933)

Comment [HTML is the new Markdown. Your agent reads a different page](https://hashnode.com/posts/the-page-your-agent-reads/6ad3f83669a965c237b00933)

[Yunus Emre Vurgun](https://hashnode.com/@yunusemrevurgun)

[Oct 18](https://hashnode.com/posts/the-page-your-agent-reads/6ad3f83669a965c237b00933/comment/6ad458b2071e17eeebe46fc2)

The point that the agent and the human can read different versions of the same page is the part people underrate. A cheap check is to log a hash of the exact text the agent received next to its answer, so when it says something odd you can see right away whether it was fed hidden content or just reasoned badly. Treating fetched page text as data in its own clearly marked block, never mixed into the instructions, also cuts down how often hidden lines get followed.

[Mahesh](https://hashnode.com/@filtercoffeeway)

[Oct 18](https://hashnode.com/posts/the-page-your-agent-reads/6ad3f83669a965c237b00933/comment/6ad458b2071e17eeebe46fc2#reply-6ad46d079a9b6ceb9a90147e)

Thank you, Yunus. The hash log is easy to add, and I will use it in my next test. I will also test how often a model follows hidden lines inside a "data only" block.

[Yunus Emre Vurgun](https://hashnode.com/@yunusemrevurgun)

[Oct 18](https://hashnode.com/posts/the-page-your-agent-reads/6ad3f83669a965c237b00933/comment/6ad458b2071e17eeebe46fc2#reply-6ad4817d475c526f7e215e3e)

Glad it's useful. One tip for the data-only test: run each hidden line in two places, inside the marked block and inline in the prompt, with the same seed and temperature 0. Then the gap between the two follow rates shows what the block itself is worth, not just the model's baseline.