The web now has a first reader, and it isn’t human.

A Senteri Briefing Update — 9 June 2026. This briefing was written as a record of May, and it stands as written. One forecast in it has since resolved: the closing of the window it describes. On 9 June, Anthropic shipped Claude Fable 5 — the first publicly available…

For the first time there’s crawl-scale data on what structured markup the web actually carries — and it says the machine-readable web is narrower, more automated, and more out-of-date than anyone admits. We have spent two years arguing about how to make websites…

Field report from the Governance layer of agent-readiness — the business decisions sitting on top of all the technical work, now that most of your traffic isn’t human. Here is the number that ends the argument about whether this matters yet. As of June 2026,…

Field report from the Data layer of agent-readiness — and why “add FAQ schema” stopped being the answer in May 2026. Here is a small experiment you can run in your head. Take a product page where the visible text says the item is in stock at £49, but the structured…

What an AI agent actually needs from your website — six layers, three starting points, and the parts that will change before the year is out. Most writing about AI agents and the web argues about the future. This is not that. By June 2026, agents are already the thing…

Two visually identical pages, ten files to download, and Claude in Chrome as the test subject. I assumed JavaScript rendering, onclick handlers, and an iframe would stop the agent cold. None of them did — and that failure turned out to be the most useful result I…

Every few years a technology gets called “the standard that changes everything,” and almost every time it’s marketing. So when Anthropic quietly dropped the Model Context Protocol on GitHub in November 2024 — no fanfare, a modest press note, two SDKs — the safe…

For thirty years, the deal was simple. You put a robots.txt at the root of your site, it said allow or disallow, and crawlers obeyed. It was a gentlemen’s agreement: you stated a preference, well-behaved bots respected it, and in exchange…

For two years, the entire conversation about prompt injection has pointed in one direction: the chatbot. We worried about the box where users type. We hardened the input field. We red-teamed the assistant. We were guarding the wrong door. In 2026, the most dangerous…