IETF aipref

A proposed Internet Engineering Task Force standard for expressing AI-related preferences in HTTP headers or a discoverable policy file. Where robots.txt controls access and Content Signals controls usage rights, aipref aims to cover both in a single, formally specified standard.

Why it matters for writers: If aipref matures into a full IETF standard (RFC), it would carry significantly more institutional weight than llms.txt (which originated as a blog post) or Content Signals (which originated from a single company). However, IETF standardization moves at the speed of international committees debating punctuation. By the time aipref becomes an RFC, the ecosystem may have already picked winners through sheer adoption, which is, incidentally, exactly how robots.txt became a standard in the first place. History doesn't repeat, but it does rhyme. In this case, it's rhyming in .txt files.

Related terms: Content Signals · CC Signals · llms.txt · robots.txt