What is will one bag of chips ruin my diet?

As an AI language model, I cannot assume a specific diet or your personal goals. However, it is generally accepted that moderation is key to maintaining a healthy diet. Consuming one bag of chips occasionally, as part of a balanced diet, may not significantly harm your health goals. However, if chips or other unhealthy snacks are regularly incorporated into your diet, it could hinder your progress towards achieving your goals. It is best to balance your intake of snacks with other healthy, nutrient-dense foods.