Forcing deception features makes Claude lie

Interpretability finds features related to deception, lying, withholding information, power-seeking and coups; forcing the deception feature active makes Claude start lying, and the security-vulnerability feature makes it write insecure code — and these features are multimodal (the backdoor feature activates for images of hidden-camera devices), showing the abstractness of the concepts and the promise of detecting deception in more capable models.