How to choose csv delimiter for rainbow highlighting

[ReLoneR1]

by default its everything. I would like to change it to be specifically ;

how can i do it in runtime / config?

my use case is csv columns separated by ;
and data itself contains ,
so highlighting is using , and ; simultaneously

[cookesan]

I don't think there is a runtime/config switch for this right now.

The built-in csv language is wired to the rainbow-csv-tree-sitter grammar in languages.toml, and Helix's current CSV highlight query treats all three of these as delimiters:

[
  ";"
  ","
  "|"
] @punctuation.delimiter

So languages.toml can enable/disable the language or point it at a different grammar, but it does not expose a CSV delimiter setting like delimiter = ";".

If you only wanted to change the punctuation highlighting, you could override runtime/queries/csv/highlights.scm in your runtime directory and remove "," and "|". But for your actual case, where commas inside values should not affect the column coloring, that needs parser/query support for a semicolon-only CSV dialect rather than just a theme setting. I would treat that as a Helix feature request or a custom grammar/query setup.