Audit URL word separators and generate hyphenated slugs, the readable parts of page addresses. Plan changes from underscores or spaces, including permanent redirects, internal link updates, and sitemap changes.
Use when auditing URL structures for word separator format, generating slugs from titles, or planning a URL migration from underscores or spaces to hyphens with appropriate redirects.
Review the instructions the agent will receive before you install.
Google's search systems interpret hyphens in URLs as word boundaries, enabling it to match the URL against individual keyword queries. Underscores join words into a single token, meaning /seo_practices is seen as one word 'seopractices' rather than two separate words 'seo' and 'practices'.
-) to separate words in URLs — Google treats hyphens as word separators, underscores as part of the word/best-seo-practices is better than /best_seo_practices or /bestseopracticesInspect the URL path segment of each page. Flag any URL that contains: (1) Underscores (_) as word separators (e.g., /best_practices). (2) Spaces encoded as %20 or + in path segments. (3) Mixed separators in the same URL (e.g., /best-practices_guide). Report the count of non-hyphenated URLs by category.
_ with -, spaces/%20 with -.Google's John Mueller has confirmed that Google interprets hyphens as word separators in URLs, but treats underscores as word joiners. This means a URL with underscores matches fewer individual keyword queries. For example, /web_design would match 'web_design' as a single token, while /web-design matches both 'web design' and 'webdesign' queries.
Parse all URL paths used in the application's router or CMS slug fields. Flag any path segment containing _ characters between words or any %20 space encoding. Verify slug-generation utilities produce lowercase hyphenated output. Check redirect rules to confirm old underscore URLs are permanently (301) redirected to their hyphenated equivalents.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
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