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# Description This decouples the serialized representation of `Record` from its internal implementation. It now gets treated as a map type in `serde`. This has several benefits: - more efficient representation (not showing inner fields) - human readable e.g. as a JSON record - no breaking changes when refactoring the `Record` internals in the future (see #12326, or potential introduction of `indexmap::IndexMap` for large N) - we now deny the creation of invalid records a non-cooperating plugin could produce - guaranteed key-value correspondence - checking for unique keys # Breaking change to the plugin protocol: Now expects a record/map directly as the `Record.val` field instead of a serialization of it.
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.