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Machines read your agent card
Other agents read your agent card to decide what to call and how. A person reads it once, when two systems connect. When it changes, nobody hears about it.
Your security.txt has an expiry date
A security.txt file tells researchers where to report a vulnerability. The standard requires it to expire, and it's easy to set a date and forget it.
Assertions: Alerts only for changes that matter
Netonica records every change it sees on a site. Assertions decide which changes reach you: tick what must stay true, and hear when it stops being true.
The changes nobody announces
Most trouble with a website doesn't begin with an outage. It begins with a small change that nobody mentioned, and it surfaces weeks later as a problem that looks unrelated.