Strudy is an analysis tool for Web spec crawl reports created by Reffy, designed to detect potential spec content anomalies such as missing references, invalid Web IDL terms, or inconsistent linking. It generates JSON, markdown, or HTML reports to highlight issues like specs that don't reference others normatively, use obsolete Web IDL constructs, or link inconsistently. The tool is intended for web specification authors, editors, and maintainers who need to ensure the quality and consistency of their specifications.