model: Add Laguna-S-2.1 LLM_TYPE (#26233)

src/llama-model.cpp

@@ -818,6 +818,7 @@ const char * llm_type_name(llm_type type) {
         case LLM_TYPE_100B_A6B:      return "100B.A6B";
         case LLM_TYPE_102B_A12B:     return "102B.A12B";
         case LLM_TYPE_106B_A12B:     return "106B.A12B";
+        case LLM_TYPE_118B_A8B:      return "118B.A8B";
         case LLM_TYPE_120B_A12B:     return "120B.A12B";
         case LLM_TYPE_122B_A10B:     return "122B.A10B";
         case LLM_TYPE_196B_A11B:     return "196B.A11B";

src/llama-model.h

@@ -130,6 +130,7 @@ enum llm_type {
     LLM_TYPE_100B_A6B,
     LLM_TYPE_102B_A12B, // Solar-Open
     LLM_TYPE_106B_A12B, // GLM-4.5-Air
+    LLM_TYPE_118B_A8B,  // Laguna-S-2
     LLM_TYPE_120B_A12B, // Nemotron 3 Super
     LLM_TYPE_122B_A10B, // Qwen3.5
     LLM_TYPE_196B_A11B, // Step3.5-Flash

src/models/laguna.cpp

@@ -58,6 +58,7 @@ void llama_model_laguna::load_arch_hparams(llama_model_loader & ml) {
 
     switch (hparams.n_layer()) {
         case 40: type = LLM_TYPE_30B_A3B;   break;  // Laguna-XS.2
+        case 48: type = LLM_TYPE_118B_A8B;  break;  // Laguna-S.2
         case 70: type = LLM_TYPE_230B_A10B; break;  // Laguna-M.1
         default: type = LLM_TYPE_UNKNOWN;
     }