The game has an icon to tell you whether an action is a dead end or not; it's pretty useful to know what actions need to be explored further.
Is there a legend somewhere for the icons and keywords? I haven’t found one.
Nope. I only know them out of having played the game enough (and reading patch notes) to learn them. Though I suspect they'll add one at some point.
I know what the “this conflicts with other nodes” icon means. Does the icon that looks like ->| mean “completing this will unlock new nodes”?
->|
That icon means it's a dead end.
Ah, I see! So if it doesn’t have that icon, it opens up more nodes?