Basically up until the Huge Mess checkpoint in the hotel it's the same as Any%, but then you have to go to the PICO-8 in the laundry room and beat Celeste Classic. Timing ends on beating Celeste Classic. Could also be called PICO-8%. I do not know anyone who is intrested, but only because I'm pretty sure I made this up yesterday, also I only know 1 person who has played celeste period, and they don't speedrun it. I guess if you want to run this you could put it here until the mods make it a real SRC category extension.

That doesn't get counted in the igt though.

bruh this is just 2 and a half ils and then speedrun.com/celestep8 why would you want that

I've heard of worse speedrun ideas, but I have to agree that it'd be impractical as hell to moderate because of the two separate timers. It either requires a complicated timing ruling to work (which would include looking at the footage frame by frame for an accurate timing) or abandoning IGT for RTA, neither of which I can see working.