<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>GuardML</title><description>Practical coverage of defensive AI engineering. Guardrails for LLMs, content filters and moderation pipelines, model defenses against adversarial attacks, output safety, and how to ship AI features without shipping liability with them.</description><link>https://guardml.io/</link><language>en</language><item><title>OpenAI&apos;s Under-18 Principles: what the new Model Spec teen guardrails actually do</title><link>https://guardml.io/posts/updating-our-model-spec-with-teen-protections/</link><guid isPermaLink="true">https://guardml.io/posts/updating-our-model-spec-with-teen-protections/</guid><description>OpenAI&apos;s December 18 Model Spec adds Under-18 Principles, an age-prediction classifier, and real-time moderation across modalities. Here is what those defenses cover, where they have already been bypassed, and what to layer on top if you ship for minors.</description><pubDate>Sun, 03 May 2026 00:00:00 GMT</pubDate><category>guardrails</category><category>openai</category><category>model-spec</category><category>teen-safety</category><category>age-verification</category><category>moderation</category><author>GuardML Editorial</author></item><item><title>What this site is for</title><link>https://guardml.io/posts/welcome/</link><guid isPermaLink="true">https://guardml.io/posts/welcome/</guid><description>GuardML covers defensive AI engineering. Guardrails, content filters, model defenses, and shipping AI features without shipping liability.</description><pubDate>Sat, 02 May 2026 00:00:00 GMT</pubDate><category>meta</category><author>GuardML Editorial</author></item></channel></rss>