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nvim/syntax/nu.vim

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+" Basic Nushell syntax highlighting — minimal version
+
+" Comments
+syn match nuComment "#.*$"
+hi def link nuComment Comment
+
+" Strings
+syn region nuString start=+"+ skip=+\\\\\|\\"+ end=+"+
+syn region nuString start=+'+ skip=+\\\\\|\\'+ end=+'+
+hi def link nuString String
+
+" Numbers
+syn match nuNumber "\v\d+(\.\d+)?"
+hi def link nuNumber Number
+
+" Keywords (you can expand this list)
+syn keyword nuKeyword def let mut const if else for while match return
+hi def link nuKeyword Keyword
+
+" Built-ins and operators
+syn match nuOperator "[|=<>:+*/-]"
+hi def link nuOperator Operator
+