That sounds amazing, is there any way to access this material right now?
I think it started in 2015.
On the AoC website you need to provide solutions for each day in a given year to see the next day’s problem, so you can’t instantly see all the problems from a given year unless you’ve previously completed them.
You may be able to find the problems elsewhere on the net.
Not everyday is about intcodes, but day 2, 5 and 7 are the first 3 days with intcodes and they built on top of eachother.