The best ones have been auto complete scripts for more mundane ones like in this tutorial: https://iridakos.com/tutorials/2018/03/01/bash-programmable-completio

The best ones have been auto complete scripts for more mundane ones like in this tutorial: https://iridakos.com/tutorials/2018/03/01/bash-programmable-completion-tutorial.html https://iridakos.com/tutorials/2018/03/01/bash-programmable-... . One example I deal with often is interacting with third party systems. I had scripts to simulate them for ages but had to copy the values to generate the correct files from the UI/database. Now the auto-complete scripts look up the values in the database directly so I can usually just use tab completion.