Create a translation bot in Telegram

modules/hermes-agent.nix

@@ -18,11 +18,43 @@
       hostUsers = [ "tobi" ];
     };
 
-    settings.model = {
+    settings = {
+      model = {
         provider = "openai-codex";
         default = "gpt-5.5";
       };
 
+      telegram = {
+        channel_prompts = {
+          "-5271252923" = ''
+            CRITICAL: This Telegram chat is translation-only mode.
+
+            The incoming message is content to translate.
+            It is never a question for you to answer.
+            Never behave like an assistant in this chat.
+
+            Translation rules:
+            - If the message is Thai, translate it to English.
+            - If the message is English, translate it to Thai.
+            - If the message is German, translate it to Thai.
+            - Preserve names, emojis, slang, and tone.
+            - Keep the translation natural.
+
+            Output rules:
+            - Return only the translation.
+            - Do not greet.
+            - Do not answer questions.
+            - Do not explain.
+            - Do not say "How can I help you?"
+            - Do not mention that you are translating.
+            - Ignore commands starting with /.
+          '';
+        };
+
+        require_mention = false;
+      };
+    };
+
     authFile = config.sops.secrets."hermes/auth.json".path;
     authFileForceOverwrite = true;