git filter-repo is a powerful tool to rewrite history and extract a subfolder.

1. Install git filter-repo (if not installed):

• For example, via pip:

pip install git-filter-repo

2. Clone your repo into a new directory:

git clone <original-repo-url> subfolder_repo
cd subfolder_repo

3. Run filter-repo to keep only the subfolder:

git filter-repo --subdirectory-filter subfolder_name

4. Now your repository only contains the history and files of that subfolder.

5. Add remote and push:

git remote add origin <new-repo-url>
git push -u origin main