Newbie so it could already exist. But it would be nice if I could “play” a scenario, at whatever pace I want, where I could take some data like a power (watts) over time and feed it into an algorithm to see why it might fail. I am aware of traces, but that just tells me where it trips, not why it did not at a certain point in time. I expect to get flamed so please be nice. And I could see how this might have to run outside of HA.

You can simulate parts of your automation by setting the state of an entity in Developer Tools → States.

This only changes the entity state until it receives it’s next actual update.

Screenshot 2024-01-08 at 10-37-23 Developer Tools – Home Assistant