WIRE IT IN

A delta monitor in your fine-tuning pipeline

The same cheap SAE runs at every checkpoint — a quiet CI gate that flags a backdoor before you ship.

Base + fine-tuned checkpoints
you already have these

Δa on probe inputs
@ layer 18

Diff-SAE top feature
one cheap pass

Fires on the probe set?

No → ship ✓

Yes → gate + alert + inspect feature

Near-zero false positives means it’s quiet enough to leave running on every build.

Your LLM Deception Monitor Is Broken Where it lives