The authors-report.xsl stylesheet, found in the xsl/utilities directory, will report all of the provisional cross-references and all of the properly prefixed todo-comments. The report is organized by all of the divisions in use in your project. It is meant to be simple in appearance, just text.
xsltproc -xinclude path/to/mathbook/xsl/utilities/authors-report.xsl path/to/main.ptx