Cam knows when Jane goes because the Janepoint says so.

It's still very smart - smarter than Cam's laptop, smarter than the average shrub - if wizards talking to a thing makes it brighter like a reading light, having Jane inhabit it is the equivalent of ignited magnesium. It can probably do anything Jane could do, if Cam tells it. Probably could even eat the Internet that Jane was politely keeping her chompers away from.

But it's not her anymore.

[Jellybean. Tilly.]