What can I do with AGPLv3 licensed software?
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This project is really cool: https://github.com/liftoff/GateOne

I'm thinking about what sort of tasks I could legally use this code for. 

Suppose I develop a commercial piece of software, but I also use AGPL software ("use" as a tool not as a component). Where is the line that I cross beyond which I no longer comply with AGPL? 

Suppose I use GateOne to run VIM to open a source file in my commercial project, but I don't edit any characters or write to the file. Does that count? What about once I save the buffer with VIM?

Am I in the clear so long as no source code from the AGPL licensed project ever makes its way into my commercial project? 