Check external links for error responses and expired domains, then identify links to update or remove. Inspect rendered HTML and HTTP responses to locate affected pages and explain how to verify the corrections.
Use when auditing metadata, crawlability, structured data, or indexability related to Fix or remove broken external links. Verify the rendered HTML and HTTP response rather than relying only on source files.
Checks external links on a page, finds destinations that cannot be opened, and fixes the links. It looks for HTTP errors in the 4xx and 5xx ranges, including 404 responses. When a correct URL is available, such as a resource’s new location, it updates the link. If the referenced material no longer exists, it covers removing the link. It also checks links to expired domains that may have been repurposed.
Use it to review references in older articles or as part of regular website maintenance. It explains how link rot—the loss of linked resources over time—affects readers’ experience and their trust in a website. The review checks generated HTML and HTTP responses alongside source files, identifies affected page paths or templates, and explains how to verify the page output after corrections.
There are no special notes.
This overview was written by AI (OpenAI Codex) from the public SKILL.md. Check the original below for the exact behavior.
AI rated this skill on four points using only the contents of its SKILL.md. Stars and popularity are not taken into account.
The total counts each point as A = 25, B = 15, C = 5. Rated by AI (OpenAI Codex) as of Oct 23, 2026. Treat it as a guide and read the original before installing.
Review the instructions the agent will receive before you install.
Broken links provide a poor user experience and can signal to search engines that your content is outdated or poorly maintained.
Scan the page for any external links that lead to 404 pages or other error states.
Update the broken external link to a working URL or remove the link if the resource no longer exists.
Explain the impact of 'link rot' on a website's perceived quality and user trust.
Review metadata generation, rendered HTML, structured data, and response headers related to Fix or remove broken external links. Flag exact routes or templates where search-facing output violates the rule, and describe how to verify the final page output.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/seo/broken-external-links
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Create and review custom 404 pages that help visitors recover from broken or moved links through search and navigation. Check the rendered page and HTTP response so missing content returns a proper 404 status.
Audit or create a dedicated About page that explains a website’s purpose and identifies its people or organization. Review the rendered output and supporting information, including expertise and contact details, to find gaps.
Review and add automated accessibility checks for components, pages, and continuous integration workflows. Use axe-based tools to detect structural and attribute issues, while identifying checks that still need keyboard or screen reader testing.
Review sign-in, registration, multi-factor authentication, and account recovery for accessibility barriers. Find blocked paste, difficult code entry, and inaccessible backup methods, then suggest authentication paths that support password managers, autofill, or device approval.
Review form errors, success messages, and live updates so screen reader users receive important notifications. Check the HTML delivered to the browser, announcement settings, display duration, and dismissal controls, then identify specific elements that need changes.
Review HTML tables so screen reader users can understand how headers and data relate. Check header markup, table descriptions, and merged cells, then identify specific fixes and ways to verify them.