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# Description Adds an `extern` definition (`KnownExternal`) for the `nu` command. This way you can do `help nu` and get tab completions for flags on the `nu` executable # User-Facing Changes * You can now view the flags for Nushell itself with `help nu`, and tab completion for flags on `nu` works
nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.