It's a simple VS Code extension called Code2Clipboard. It automatically copies your main project files to the clipboard, formatted like this:
// relative/path/to/file/1 {file_1_content}
// relative/path/to/file/2 {file_2_content}
It skips build and dist files, as well as any directories listed in your .gitignore. This helps keep things clean and relevant.
You can find it here on the VS Code Marketplace: https://marketplace.visualstudio.com/items?itemName=sohei1l....
It's also open source, so feel free to contribute if you find any issues!