404-page
無料Use when reviewing templates, rendered HTML, or shared components related to Create a custom 404 error page. Validate the final browser-facing markup, not just the source framework abstraction.
日本語の概要は準備中です。原文の説明を表示しています。
Use when auditing a site's internal and external links for protocol consistency, migrating a site from HTTP to HTTPS, or reviewing hardcoded URLs in a codebase that may use `http://` instead of `https://`.
インストール方法を見るインストールする前に、エージェントに与えられる指示の中身を確認できます。
Linking from a secure HTTPS page to an HTTP destination creates a mixed content situation that browsers warn users about or block entirely. It also means the linked page does not receive the ranking signal passed through the HTTPS referrer. For internal links, it can cause redirect loops or broken navigation.
//example.com) or absolute HTTPS URLs — never hardcode http:// for internal linksOn pages served over HTTPS, scan all <a href> attributes for URLs starting with http:// (not https://). Flag: (1) Internal links using http:// that should use https:// or a relative path. (2) External links to third-party sites still on HTTP (flag for review — the destination may not support HTTPS). (3) Resource links (<img src>, <script src>, <link href>) pointing to HTTP URLs — these cause active mixed content warnings.
<a href> values in templates and content for http:// links.http://yourdomain.com/path to /path (relative) or https://yourdomain.com/path.https:// if so.https:// or protocol-relative //.grep -r 'href="http://' ./templates/ or use a link auditing tool.HTTPS is a confirmed Google ranking factor. When an HTTPS page links to HTTP resources or destinations, it downgrades the secure context, triggering browser warnings and potentially blocking content. For internal links, HTTP destinations mean an extra redirect (HTTP→HTTPS) on every navigation, slowing page loads. The ranking signal passed via the link's referrer is also diminished when crossing from HTTPS to HTTP.
Parse all <a href>, <img src>, <script src>, and <link href> attributes. Flag any value starting with http:// (not https:// or a relative path). In JavaScript frameworks, also check for http:// in fetch(), axios, or router navigation calls. Report the count of HTTP links by category (internal, external, resource).
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/seo/https-downgrade
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概要と使いどころ
Use when reviewing templates, rendered HTML, or shared components related to Create a custom 404 error page. Validate the final browser-facing markup, not just the source framework abstraction.
日本語の概要は準備中です。原文の説明を表示しています。
Use when auditing metadata, crawlability, structured data, or indexability related to Create a dedicated About page. Verify the rendered HTML and HTTP response rather than relying only on source files.
日本語の概要は準備中です。原文の説明を表示しています。
Use when reviewing component libraries, page flows, or CI pipelines that need repeatable accessibility checks. Automated testing is strongest at catching structural and attribute-level issues; it does not replace keyboard, screen reader, and manual UX testing.
日本語の概要は準備中です。原文の説明を表示しています。
Use when reviewing sign-in, sign-up, MFA, CAPTCHA, recovery, and re-auth flows. Evaluate the full authentication path, including error handling and backup methods, not just the primary login form.
日本語の概要は準備中です。原文の説明を表示しています。
Use when reviewing templates, rendered HTML, or shared components related to Make notifications accessible. Validate the final browser-facing markup, not just the source framework abstraction.
日本語の概要は準備中です。原文の説明を表示しています。
Use when reviewing rendered HTML, interactive components, or design-system patterns related to Use semantic table markup for screen readers. Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output where relevant.
日本語の概要は準備中です。原文の説明を表示しています。