yq can process files with yaml front matter (e.g. jekyll, assemble and others) - this is done via the --front-matter/-f flag.--front-matter=process to process the front matter, that is run the expression against the yaml content, and output back the entire file, included the non-yaml content block. For example:--front-matter=extract will only output the yaml contents and ignore the rest. From the previous example, if you were to instead run: