Where is items.txt?

[craggy patio]

I can not find the base definition of items anywhere. Used to be in https://github.com/SteamDatabase/GameTracking-Dota2/blob/master/game/dota/pak01_dir/scripts/npc/items.txt

[timid orbit]

https://github.com/dotabuff/d2vpkr/blob/master/dota/scripts/npc/items.txt

[regal sluice]

above link is what you want.
gametracking stopped tracking pak01_dir.vpk, so you can use that above repo or this one: https://github.com/arcadia-redux/dota_vpk_updates/blob/main/scripts/npc/items.txt

or just open the .vpk locally on your device using VRF