diff --git a/extensions/llm-1.0.0.zip b/extensions/llm-1.0.0.zip
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diff --git a/libraries.conf b/libraries.conf
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--- a/libraries.conf
+++ b/libraries.conf
@@ -151,6 +151,16 @@ In general, the LevelSpace syntax has been designed to align with existing NetLo
     version: "1.0.0"
     homepage: "https://github.com/cstaelin/LinProg-Extension"
   }
+  {
+    name: "LLM"
+    codeName: "llm"
+    shortDescription: "Multi-provider LLM extension for NetLogo agents"
+    longDescription: """A NetLogo extension providing a unified interface to multiple LLM providers — OpenAI, Anthropic/Claude, Google/Gemini, local Ollama, OpenRouter, and Together AI — with per-agent conversation memory, synchronous and asynchronous chat, prompt templates, constrained choices, and reasoning/thinking-model support.
+
+Setup required: before using the extension you must provide a configuration file specifying your LLM provider and API key (Ollama, which runs locally, needs no key). Create a config file modeled on the bundled config-reference.txt, then call llm:load-config "config.txt" (or set values with llm:set-provider, llm:set-api-key, and llm:set-model) before any other llm: primitive. Without this, models — including the bundled demos — will report that the extension is not configured."""
+    version: "1.0.0"
+    homepage: "https://github.com/NetLogo/Netlogo-LLM-Extension"
+  }
   {
     name: "LLM-Chat"
     codeName: "llm-chat"