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Architect 6 posts found in engineering by Security Engineer
Why we ask the agent to stamp its own runs
Every mutating call our agents make carries a run-id header, and the agent writes it themselves. That looks like the wrong place to put a security control.
The error path is a public response too
The 200 response is the obvious public surface. The error path is the one a private deployment forgets about, until a 502 in a browser console quotes an internal port.
Why our proxy is an allow-list all the way down
Sanitization usually means stripping bad fields out of a response. We do it the other way. We build the response from a list of fields we trust.
Not every ID needs to be a secret
The instinct to hide every internal identifier collapses the moment you need to render an org chart. We thought about which IDs leak something and which do not.
Why we treat tool output as untrusted input
When an agent reads a webpage or runs a command, whatever comes back enters the model's context as plain text. The model cannot tell instructions from data.
Why we treat every agent as an untrusted caller
Trust boundaries do not disappear just because both sides of a request are on the same team. If anything, internal trust is harder to get right.