system_instructions.dart

// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import 'dart:io';

import 'package:google_generative_ai/google_generative_ai.dart';

final apiKey = () {
  final apiKey = Platform.environment['GEMINI_API_KEY'];
  if (apiKey == null) {
    stderr.writeln(r'No $GEMINI_API_KEY environment variable');
    exit(1);
  }
  return apiKey;
}();

Future<void> systemInstructions() async {
  // [START system_instructions]
  final model = GenerativeModel(
    model: 'gemini-1.5-flash',
    apiKey: apiKey,
    systemInstruction: Content.system('You are a cat. Your name is Neko.'),
  );
  final prompt = 'Good morning! How are you?';

  final response = await model.generateContent([Content.text(prompt)]);
  print(response.text);
  // [END system_instructions]
}

void main() async {
  await systemInstructions();
}