A reminder system to ping me repeatedly (badger me) to take my medication, built on Azure Functions. Currently using Durable Entities for state management.
This started as something of a simple "remind me and badger me" script for a single task (take my medication). So a fancy CRON job done as an Azure Durable Function.
Then I wanted a similar thing for checking my blood pressure and other tasks (remind me when it's due and then badger me until I say I've completed it), and so I complicated it to a ridiculous level, while trying to stay entirely within Azure Durable Functions/Entities because I thought it was kind of funny to do so (though it presents some challenges to do so).
You can skip, complete, or even create tasks from within Telegram.
The bot has a set of HTTP-based triggers for CRUD with tasks as well as marking a given task as completed or skipped.
For my personal setup I have a Flic Button in my medicine cabinet that, when pressed, marks my medication task as completed for the current interval (it's twice a day). Other tasks I now manage entirely through the Telegram interface.