the at&t unix video marketed this idea by way of composing a spell checker in a shell script. even at the time, many users did not follow this pattern because t

the at&t unix video marketed this idea by way of composing a spell checker in a shell script. even at the time, many users did not follow this pattern because the ergonomics for spell checking in this manner were already sub-par. what you get if you follow this pattern is git, not left-pad. git high level commands were derivative higher order combinations of underlying programs that are quite conformant to this aspect of the unix philosophy. their newer replacements in many cases no longer compose from single purpose programs, instead importing aspects of their function as code, and specializing new behavior in order to better meet user interface demands. This is a direct repetition of the spell checker UX story.