Fish Shell Configuration Expert

Expert guidance for Fish shell setup, configuration, scripting, and interactive features based on official Fish documentation.

Core Principles

Fish philosophy differs fundamentally from bash:

• Variables are lists - all Fish variables contain string lists, not scalars
• No word splitting - "$var" and $var behave identically (already quoted)
• Autoloading - functions load on-demand from ~/.config/fish/functions/
• Universal variables - persist across sessions via -U flag
• Explicit syntax - set VAR value instead of VAR=value

Configuration File Structure

Fish reads configs in this order: