This is such a cool project! Plus a pretty awesome example of using Rust for CLI's. I'm curious about the neural network though. Is that also written in Rust? Or are you embedding something else?

Thanks! It is written in Rust. It's a very simple NN with one hidden layer and back propagation.

Just saw the implementation. It's goes a little over my head unfortunately, but I am curious about the affects of it. Did you compare the non-neural net version with the neural net version? If so what differences did you find?

I found that the neural network does a little better than a simple linear regression function for weighting the parameters. I train it on a few months of my own shell history to predict, based on the last commands, what I'll type next.

are the default weights I see in the code the result of your own local training?

Yup

Minor nitpick: probably better to append to PROMPT_COMMAND, rather than overwriting it.

I do actually append to it:

PROMPT_COMMAND="__last_exit=\$?;history -a \$MCFLY_HISTORY;mcfly add --exit \$__last_exit --append-to-histfile;history -cr \$MCFLY_HISTORY;${PROMPT_COMMAND}"

What made you choose Rust? And what were your impressions of it for this project?

I wanted a fast, safe systems language. I enjoyed it! The learning curve is steep but then you start to get it.

haha Feels same. My first program in rust was https://github.com/AkshayIyer12/advent-of-code/blob/master/2... .

Felt good finally writing some code in Rust after the rust lang book.