Not OP, but I also have a project that would slot in nicely.

I run a service that tracks work/sleep/exercise/meditation (along with a couple other data points that don't fit the duration model) via an SMS interface.

I text it when I start/stop these activities and then it sends me reminders based on when I normally do those things during the day if I haven't already.

It would be great to be able to push the data I collect into your service to have a unified view of how I spend my time, and also to pull events from your service to send reminders to do certain things via my bot.