zsh-autosuggestions is a popular Zsh plugin that displays gray, inline suggestions as you type, based on your shell history and other strategies. It feels a lot like “typeahead” for the terminal: the moment your input matches a past command prefix, a suggestion appears and you can accept it with a key (e.g., right arrow or end-of-line). The plugin is lightweight and fast, designed to keep suggestions responsive even on large histories by performing lookups asynchronously when possible. It’s...