feat(cli): prompt for OpenAI API key in interactive mode

packages/openui-cli/src/commands/create-chat-app.ts

@@ -109,20 +109,47 @@ export async function runCreateChatApp(options: CreateChatAppOptions): Promise<v
           ? "bun"
           : "npm";
 
-  console.info(getStartedMessage(name, devCmd, installSkill));
+  let apiKeyWritten = false;
+  if (!options.noInteractive) {
+    const { input } = await import("@inquirer/prompts");
+    const apiKey = (
+      await input({ message: "Enter your OpenAI API key (leave blank to skip):" })
+    ).trim();
+
+    if (apiKey) {
+      fs.writeFileSync(path.join(targetDir, ".env"), `OPENAI_API_KEY=${apiKey}\n`);
+      apiKeyWritten = true;
+    }
+  }
+
+  console.info(getStartedMessage(name, devCmd, installSkill, apiKeyWritten));
 }
 
-const getStartedMessage = (name: string, devCmd: string, skillInstalled: boolean) =>
-  `
-Done!
-Get started:
+const getStartedMessage = (
+  name: string,
+  devCmd: string,
+  skillInstalled: boolean,
+  apiKeyWritten: boolean,
+) => {
+  const envInstructions = apiKeyWritten
+    ? "✅ .env file created with your API key."
+    : `touch .env
 
-cd ${name}
+Add your API key to .env:
+OPENAI_API_KEY=sk-your-key-here`;
 
-touch .env
+  const skillMessage = skillInstalled
+    ? "The OpenUI agent skill was installed.\nAI coding assistants will use it to help you build with OpenUI."
+    : "";
 
-Add your API key to .env:
-OPENAI_API_KEY=sk-your-key-here
+  return `${skillMessage}
+
+Done!
+Get started:
+
+${envInstructions}
 
-${devCmd} run dev
-${skillInstalled ? "\nThe OpenUI agent skill was installed.\nAI coding assistants will use it to help you build with OpenUI.\n" : ""}`;
+> cd ${name}
+> ${devCmd} run dev
+`;
+};