Nothing was enforcing it
Three studies about arrangements a firm believes it has: a route from junior to senior, a delivery loop that damps rework, and a credential that narrows when an agent hands work on.
How we Organise
The junior work did not disappear, it moved
Juniors entering software work, and the seniors above them, were asked what had changed. The junior work has not gone. It has moved into work a senior now runs alongside the machine, so juniors stop doing the tasks by which people used to become good.
We hold that taking the junior work away removes the route by which people become senior. That rested on hiring counts and task experiments, neither of which shows how the narrowing happens inside a working week. This is the first group asked directly, and it is fourteen people in one country.
How we Build
The rework did not fall as the session went on
Requirements arriving after implementation has begun are followed by about twice the rework of an ordinary edit, across thousands of real coding-agent sessions. It does not shrink as a session runs. Warning people that late requirements were coming changed nothing measurable.
We sell thin increments partly on the promise that each piece settles something the next would have hit, so a session gets less wasteful as it goes. It does not. Small pieces still catch rework inside a session rather than after a release. What has to go is the part a client hears as a saving.
How we Assure
A hijacked sub-agent reached 1.5 actions instead of 8,100
A compromised sub-agent reached a mean of 1.5 actions with an authorisation broker in front of it, against 8,100 when the parent handed down its own credential. Of four widely used agent frameworks, three confine nothing of their own.
We ask that an agent hold its own short-lived credential, no wider than the person who set it going. The standing objection is overhead nobody has time for, and here it costs microseconds. What fails is the authorisation decision taken inside the model, which is where an obvious build puts it. One broker, tested by its authors.