Thank you. A lot of our content is pre-created and not live generated. Every figure has a fact check modal, which can also be fetched via CDN, for example:

https://media.agoracosmica.org/factchecks/en/jung.json

For the live generated content, sure, we cannot rule out hallucinations. From testing it feels like a grounded instruction helps, but to be honest we have not measured it. Therefore we have the "Echo" framing, disclaimers on the landing pages, and checkboxes when entering the app.

A registry is not planned because every figure needs a lot of pre-created content. As mentioned in another comment we plan to add more figures in the future, but we will let the community decide which one.