SD is a directory navigation utility for ksh93u+, bash >= 4.2, and zsh >= 4.3, using frequency–recency tracking over an explicit visit history. Ksh-compatibility options are enabled: extglob in {bash;} KSH_ARRAYS, KSH_GLOB, POSIX_BUILTINS, and SH_WORD_SPLIT in zsh.

WWW: https://github.com/jghub/sd-switchdir
