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==Features==
Fish displays [[incremental search|incremental suggestions]] as the user types, based on command history and the current directory. This functions similarly to [[Bash (Unix shell)|Bash]]'s {{keypress|Ctrl|R}} history search, but is always on, giving the user continuous feedback while typing commands. Fish also includes feature-rich [[command-line completion|tab completion]], with support for expanding file paths (with [[wildcard character|wildcard]]s and [[Bash (Unix shell)#Brace expansion|brace expansion]]{{Broken anchor|date=2025-07-31|bot=User:Cewbot/log/20201008/configuration|target_link=Bash (Unix shell)#Brace expansion|reason=Anchor "Bash (Unix shell)#Brace expansion" links to a specific web page: "Brace expansion". The anchor (Brace expansion) [[Special:Diff/1303454031|has been deleted]].|diff_id=1303454031}}), [[Environment variable|environment variables]], and command-specific completions. Command-specific completions, including options with descriptions, can be to some extent generated from the commands' [[man page|man pages]], but custom completions can also be included with software or written by users of the shell.<ref>{{Cite web |title=Writing your own completions |url=https://fishshell.com/docs/current/completions.html |url-status=live |archive-url=https://web.archive.org/web/20240831075627/https://fishshell.com/docs/current/completions.html |archive-date=2024-08-31 |website=fish shell}}</ref>
The creator of Fish preferred to add new features as commands rather than syntax. This made features more [[Discoverability|discoverable]], as the built-in features allow searching commands with options and help texts. [[Subroutine|Functions]] can also include human readable descriptions. A special ''help'' command gives access to all the fish documentation in the user's [[web browser]].<ref>[https://www.linux.com/news/cli-magic-enhancing-shell-fish Linux.com]. CLI Magic: Enhancing the shell with fish. Retrieved 2010-03-24.</ref>
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