Jump and run along platforms (solid/jump-thru objects).
Actually I also came here for the source code of platform behavior to extend it. I know that I can get source from browser or exports but it would be simply very convenient to have it here.
We intentionally do not share the source code to plugins/behaviors, as modifying them causes really painful compatibility nightmares. It really causes more problems than it solves. You should find another way to make alterations - the Platform behavior is already highly customisable from events.
Is there source code or at least physics algorithms to look at? I'm trying to recreate precisely another system and am trying to figure out if the Platform behaviour is adequate on its own.