One efficient way of using the package is to assign selections to a variable for repeated use in a document. For example, if you're writing about the experimental evaluation of a pilot program, you'd often switch between the text "the pilot group" and "the control group." Rather than repeatedly writing a call to sel_inline_text(), you should be able to make this assignment:
name_selection <- sel_inline_text(sel_id = "group_selection",
options = c("Pilot" = "the pilot group",
"Control" = "the control group"))
and repeatedly refer to name_selection in your rmarkdown.
This ought to be tested and documented in the main package documentation.