This is a Unity Editor extension that allows you to create shaders using the OpenAI API.
Go to Window->Package Manager->Install package from git URL... and enter the following URL to install:
https://github.com/tkada/unity_openai_shader.git
Open the window from Tools->OpenAI->Shader Creator.
Enter your OpenAI API KEY in the API KEY field.
Type your prompt in the Prompt field and click Create Shader.
After a short while, the shader will be generated. You can either copy the shader code with Copy Shader Code or save it with Save as Shader.