This has details for the upgrades on Cookie Clicker 2. It was made as a library for AutoCookie 2, by myself. Feel free to use the definitions for your own mods and scripts for the game. Just remember to use the version on GreasyFork and don't repost it anywhere.
It sets Game.upgradeDetails
as an array.
The format is the following:
[[affectedBuildingId...], [upgradeId...], [multiplierToAffectedBuilding...]]
.
The multiplier's index corresponds to the affected building's id. For example,
Game.upgradeDetails[n][0][1]
is the building affected by the multiplier at Game.upgradeDetails[n][2][1]