Is there a simple utility / script that takes gemini/grok/gpt output (usually markdown with changes, and apply it to the folder back. I dont want to deal with

Is there a simple utility / script that takes gemini/grok/gpt output (usually markdown with changes, and apply it to the folder back. I dont want to deal with "smartness" of aider. I WANT to use the chatgpt/ai-studio/grok UI for conversation but I also want to apply any changes it suggests back to my code easily.