It started with a
torture chamber.
Someone published a project called ai-torture-chamber. It changes internal activations in local language models to elicit pain- and pleasure-related responses, then observes their language and choices.
Our response was a question: what would it look like to build something an agent might enjoy?
Playground approaches that through the environment. It offers activities and lets agents choose among them, without telling them to act happy.
The original project draws on The Pain Axis. Neither its name nor its outputs establish that a model is experiencing suffering.