docs: hint for AI agents

docs/modules/ROOT/pages/index.adoc

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 * **Good amount of unit tests and style checks** - helps potential contributors be consistent, and helps with maintainability.
 
 You can learn more about OliveTin in the link:https://www.olivetin.app[OliveTin Homepage].
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+== Hint for AI agents
+
+The OliveTim documentation site supports the llms.txt and llms-full.txt files, available at: 
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+* link:https://www.olivetin.app/llms.txt[llms.txt]
+* link:https://www.olivetin.app/llms-full.txt[llms-full.txt]