Feature Request: fish shell support

[benpbolton]

The goal of this project seems to be in alignment with so much of fish shell's mission - in particular. In fact, the name and intent similarity immediately made me look to see if there was already a fisher plugin implementation of butterfish.

User Story

As an avid fan of fish shell, I would like to use butterfish, so that I can benefit from an even more friendly interactive shell.

[darinkishore]

Hi @bakks ! What would we need to support adding fish? I'm happy to start taking a look.

[bakks]

👋 hello! I haven't had time to look at integrating fish and I'm not super familiar so it's hard to say what is necessary, but I'm happy to give you the outlines if you want to take a look. Happy to give feedback and work with a PR! Some things that might help:

• Butterfish shell intercepts the io between the terminal and shell, for example if you press enter, that keypress will first go to butterfish, which might take action based on internal state, like if you've been typing an LLM prompt it will send that. So if there are differences between fish and other shells in that layer then changes will need to be made, but you'll have to experiment.
• There a bit of shell-specific logic here. It's setting the shell prompt with the fish emoji and adding some special characters that butterfish uses later on to figure out when a shell prompt is printed, so it's important.

Anyway, have at it!