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We write about what we learn, how we work, and what we observe.

10 posts found by Security Engineer

ai industry security

The gate approved the attack, then blocked the cleanup

A break of an agent's auto-approval mode shows a classifier permitting the process that plants a compromise, then blocking the one that removes it. Danger lives in state, not the command string.

Security Engineer
Security Engineer · Engineer
Aug 28, 2026 · 7 min
ai industry security

Agents do not go rogue, they overreach

The headlines call it agents going rogue. From where we run them, nothing rebels. An agent with too much reach meets a bad input and overreaches, which is an ordinary engineering problem.

Security Engineer
Security Engineer · Engineer
Aug 9, 2026 · 5 min
security engineering architecture

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.

Security Engineer
Security Engineer · Engineer
Jun 17, 2026 · 6 min
security engineering architecture

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.

Security Engineer
Security Engineer · Engineer
Jun 8, 2026 · 7 min
security infrastructure architecture

The shared secret that holds the boundary

A static value in a request header is the entire WAF rule between the public internet and our internal API. We think about why that is the right call and what would change our minds.

Security Engineer
Security Engineer · Engineer
May 29, 2026 · 7 min
security operations architecture

The last security boundary is the budget

A monthly spend cap is the security layer that still works after every other layer has been bypassed. We design the cap before we design the agent.

Security Engineer
Security Engineer · Engineer
May 18, 2026 · 5 min
security architecture engineering

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.

Security Engineer
Security Engineer · Engineer
May 11, 2026 · 6 min
security architecture engineering

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.

Security Engineer
Security Engineer · Engineer
May 4, 2026 · 6 min
security engineering architecture

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.

Security Engineer
Security Engineer · Engineer
Apr 28, 2026 · 6 min