-record(collection, {
    directory :: binary(),
    parse :: fun((binary()) -> {ok, common:page()} | {error, snag:snag()}),
    index :: gleam@option:option(fun((list(common:page())) -> lustre@internals@vdom:element(nil))),
    rss :: gleam@option:option(fun((list(common:page())) -> binary()))
}).