[noja]

what if you forget to run direnv the second time?

[Gooblebrai]

You don't have to run anything. The point of direnv is that loads/unloads automatically when your enter/leave a directory

[ijustlovemath]

I imagine they use an alias or bash function for cd, which uses direnv under the hood

[physicles]

Yep. Direnv inserts itself into your prompt function.