Your webpage doesn't have any explanation other than a video. I can read a paragraph or two in a couple of seconds--I'm not going to take a minute and a half (and stop listening to the music I'm listening to) to watch a video. The GitHub README doesn't really have any information about what it is either.
I haven't actually tried this, because I have no idea what it is. The other comment in here linked to an example .freshrc file--I noted that every line that's not a comment starts with the string 'fresh ', which seems like an obvious annoyance. Even if you want it to just be a shell script you can execute, you could support a batch mode to do something like this, for example:
fresh batch <<'BATCH'
We will add some more info to the home page but we were trying to keep most of the info in the README.
> The GitHub README doesn't really have any information about what it is either.
What else would you like to know?
The batch mode is a good idea, however the way we're doing it is a tried and true method used by many dev tools Bundler, Vundle, etc.