Merge pull request #111 from janhq/82-feat-add-custom-user-assistant-prompt-option-as-a-server-option-for-nitro

82 feat add custom user assistant prompt option as a server option for nitro

Author: tikikun

controllers/llamaCPP.cc

@@ -77,7 +77,8 @@ void llamaCPP::chatCompletion(
 
   const auto &jsonBody = req->getJsonObject();
   std::string formatted_output =
-      "Below is a conversation between an AI system named ASSISTANT and USER\n";
+      "Below is a conversation between an AI system named " + ai_prompt +
+      " and " + user_prompt + "\n";
 
   json data;
   json stopWords;
@@ -94,9 +95,19 @@ void llamaCPP::chatCompletion(
 
     const Json::Value &messages = (*jsonBody)["messages"];
     for (const auto &message : messages) {
-      std::string role = message["role"].asString();
+      std::string input_role = message["role"].asString();
+      std::string role;
+      if (input_role == "user") {
+        role = user_prompt;
+      } else if (input_role == "assistant") {
+        role = ai_prompt;
+      } else if (input_role == "system") {
+        role = system_prompt;
+      } else {
+        role = input_role;
+      }
       std::string content = message["content"].asString();
-      formatted_output += role + ": " + content + "\n";
+      formatted_output += role + content + "\n";
     }
     formatted_output += "assistant:";
 
@@ -105,8 +116,7 @@ void llamaCPP::chatCompletion(
       stopWords.push_back(stop_word.asString());
     }
     // specify default stop words
-    stopWords.push_back("user:");
-    stopWords.push_back("### USER:");
+    stopWords.push_back(user_prompt);
     data["stop"] = stopWords;
   }
 
@@ -202,19 +212,19 @@ void llamaCPP::loadModel(
   LOG_INFO << "Drogon thread is:" << drogon_thread;
   if (jsonBody) {
     params.model = (*jsonBody)["llama_model_path"].asString();
-    params.n_gpu_layers = (*jsonBody)["ngl"].asInt();
-    params.n_ctx = (*jsonBody)["ctx_len"].asInt();
-    params.embedding = (*jsonBody)["embedding"].asBool();
+    params.n_gpu_layers = (*jsonBody).get("ngl", 100).asInt();
+    params.n_ctx = (*jsonBody).get("ctx_len", 2048).asInt();
+    params.embedding = (*jsonBody).get("embedding", true).asBool();
     // Check if n_parallel exists in jsonBody, if not, set to drogon_thread
-    if ((*jsonBody).isMember("n_parallel")) {
-      params.n_parallel = (*jsonBody)["n_parallel"].asInt();
-    } else {
-      params.n_parallel = drogon_thread;
-    }
+
+    params.n_parallel = (*jsonBody).get("n_parallel", drogon_thread).asInt();
 
     params.cont_batching = (*jsonBody)["cont_batching"].asBool();
-    // params.n_threads = (*jsonBody)["n_threads"].asInt();
-    // params.n_threads_batch = params.n_threads;
+
+    this->user_prompt = (*jsonBody).get("user_prompt", "USER: ").asString();
+    this->ai_prompt = (*jsonBody).get("ai_prompt", "ASSISTANT: ").asString();
+    this->system_prompt =
+        (*jsonBody).get("system_prompt", "ASSISTANT's RULE: ").asString();
   }
 #ifdef GGML_USE_CUBLAS
   LOG_INFO << "Setting up GGML CUBLAS PARAMS";

controllers/llamaCPP.h

@@ -2142,5 +2142,8 @@ class llamaCPP : public drogon::HttpController<llamaCPP> {
   size_t sent_count = 0;
   size_t sent_token_probs_index = 0;
   std::thread backgroundThread;
+  std::string user_prompt;
+  std::string ai_prompt;
+  std::string system_prompt;
 };
 }; // namespace inferences