"Looks like double backslash is..." <- > <@burrbull:matrix.org> Looks like double backslash is needed: > > ```yaml > _expand_array: > "KEY\\[%s\\]": {} > ``` > First for YAML parser and second for name matcher > > or in this particular case just > > ```yaml > _expand_array: > KEY*: {} > ``` Thank you! I had tried single backslash which did not work, and would never have dreamed of double backslash! Thank you again.