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# Description The meaning of the word usage is specific to describing how a command function is *used* and not a synonym for general description. Usage can be used to describe the SYNOPSIS or EXAMPLES sections of a man page where the permitted argument combinations are shown or example *uses* are given. Let's not confuse people and call it what it is a description. Our `help` command already creates its own *Usage* section based on the available arguments and doesn't refer to the description with usage. # User-Facing Changes `help commands` and `scope commands` will now use `description` or `extra_description` `usage`-> `description` `extra_usage` -> `extra_description` Breaking change in the plugin protocol: In the signature record communicated with the engine. `usage`-> `description` `extra_usage` -> `extra_description` The same rename also takes place for the methods on `SimplePluginCommand` and `PluginCommand` # Tests + Formatting - Updated plugin protocol specific changes # After Submitting - [ ] update plugin protocol doc
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.