Writing a visual studio extension by myself?

[TomTheFurry]

Since there's no support for visual studio IDE yet, I wish to write an extension to see how copilot helps me on developing my projects. I know that support for visual studio is coming soon, but since extensions for VS2019 for some reason is separated from VS2021, and I use 2021 version mostly, I am hoping to write the extension for VS2021.

Is is allowed / okay for me to peek at the code and maybe write a visual studio extension that hooks into the copilot? I can either keep the project private, public, or open source depending on what you think are appropriate.

(Not that I am even sure that I can write one. Just wanting to ask before I start the project just in case.)