add sitemap and robots

talks.html

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   <meta property="og:title" content="Talks & Publications — Veit Heller">
   <meta property="og:description" content="Workshops, talks, and publications by Veit Heller on threat modelling, ISMS, SSDLC, network automation, and programming languages.">
   <meta property="og:locale" content="en_US">
-  <meta name="twitter:card" content="summary">
+  <meta property="og:image" content="https://veitheller.de/og.png">
+  <meta property="og:image:width" content="1200">
+  <meta property="og:image:height" content="630">
+  <meta property="og:image:alt" content="Veit Heller—Technologist at Large">
+  <meta name="twitter:card" content="summary_large_image">
   <meta name="twitter:title" content="Talks & Publications — Veit Heller">
   <meta name="twitter:description" content="Workshops, talks, and publications by Veit Heller on threat modelling, ISMS, SSDLC, network automation, and programming languages.">
+  <meta name="twitter:image" content="https://veitheller.de/og.png">
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   <script defer data-domain="veitheller.de" src="https://plausible.io/js/script.tagged-events.outbound-links.js"></script>
   <title>Talks & Publications — Veit Heller</title>
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     </section>
 
     <section id="talks" class="panel" role="tabpanel" aria-labelledby="label-talks">
+      <article>
+        <h3><i>Upcoming:</i> AI Architecture Katas: Learning by Building Small Models in Plain Python </h3>
+        <p><em>EuroPython, 2026</em><br>
+        A talk about how to build your own small but capable models for larning, and how to approach the big and scary world of AI/LLM research.</p>
+      </article>
+
       <article>
         <h3><i>Upcoming:</i> Type Systems You Might Not Know (But Will Love)</h3>
         <p><em>WeAreDevelopers World Congress Europe, 2026</em><br>
@@ -236,7 +247,6 @@
         <h3>Von der Cloud ins Rack – Wie Netzautomatisierung souveräne RZ-Umgebungen ermöglicht</h3>
         <p><em>Rack & Stack 2026</em><br>
         A German talk on high fidelity network automation to drive the adoption of sovereign data infrastructure.</p>
-        <p><i>Recording pending</i></p>
       </article>
 
       <article>