Add --no-system-prompt flag

Author: A8065384

src/subcommands/chat/index.tsx

@@ -26,7 +26,7 @@ type ChatCommandOptions = OptionValues &
   CreateClientArgs &
   LogLevelArgs & {
     prompt?: string;
-    systemPrompt?: string;
+    systemPrompt?: string | false;
     stats?: true;
     ttl: number;
     dontFetchCatalog: boolean;
@@ -175,6 +175,7 @@ const chatCommandBase = new Command<[], ChatCommandOptions>()
   .argument("[model]", "Model name to use")
   .option("-p, --prompt <prompt>", "Print response to stdout and quit")
   .option("-s, --system-prompt <systemPrompt>", "Custom system prompt to use for the chat")
+  .option("--no-system-prompt", "Omit the system prompt entirely")
   .option("--stats", "Display detailed prediction statistics after each response")
   .addOption(
     new Option("--ttl <ttl>", "Time (in seconds) to keep the model loaded after the chat ends")
@@ -208,7 +209,9 @@ chatCommand.action(async (model, options: ChatCommandOptions) => {
     process.exit(1);
   }
   const chat = Chat.empty();
-  chat.append("system", options.systemPrompt ?? DEFAULT_SYSTEM_PROMPT);
+  if (options.systemPrompt !== false) {
+    chat.append("system", options.systemPrompt ?? DEFAULT_SYSTEM_PROMPT);
+  }
   const cliPref = await getCliPref(logger);
   const shouldFetchModelCatalog = await getOrAskShouldFetchModelCatalog(
     dontFetchCatalog,