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core(audit): added content-signal directive in robots.txt file #16767

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core(audit): added content-signal directive in robots.txt file #16767

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2 changes: 1 addition & 1 deletion core/audits/seo/robots-txt.js
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ const DIRECTIVE_SAFELIST = new Set([
DIRECTIVE_ALLOW, DIRECTIVE_SITEMAP, // universally supported
'crawl-delay', // yahoo, bing, yandex
'clean-param', 'host', // yandex
'request-rate', 'visit-time', 'noindex', // not officially supported, but used in the wild
'request-rate', 'visit-time', 'noindex', 'content-signal', // not officially supported, but used in the wild
]);
const SITEMAP_VALID_PROTOCOLS = new Set(['https:', 'http:', 'ftp:']);

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3 changes: 3 additions & 0 deletions core/test/audits/seo/robots-txt-test.js
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Expand Up @@ -224,6 +224,9 @@ User-agent: NotOfficial
noindex: /bla
Visit-time: 0600-0845
Request-rate: 1/30m

User-agent: RespectfulAI
Content-Signal: ai-train=yes, search=yes, ai-input=yes
`,
},
];
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