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# Description `Value` describes the types of first-class values that users and scripts can create, manipulate, pass around, and store. However, `Block`s are not first-class values in the language, so this PR removes it from `Value`. This removes some unnecessary code, and this change should be invisible to the user except for the change to `scope modules` described below. # User-Facing Changes Breaking change: the output of `scope modules` was changed so that `env_block` is now `has_env_block` which is a boolean value instead of a `Block`. # After Submitting Update the language guide possibly.
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.