This extension provides language support for ocaml sexp in visual studio code. More on ocaml sexp: https://dev.realworldocaml.org/data-serialization.html.
In order for syntax highlighting for sexp comment to work correctly, you may want to add the following to your settings.json.
"editor.tokenColorCustomizations": {
"textMateRules": [
{
"scope": [
"comment.sexp string.unquoted",
"comment.sexp string.quoted.double"
],
"settings": {
"foreground": "#6A9955"
}
}
]
}