How to reuse existing Gthub Repo without deleting your existing code

Step-by-step

1. Go to your old repository on GitHub

Make sure the current main branch still has the old code.

2. Create a branch + tag for the old version

Run these commands locally (while you still have the old code):

# Clone the old repo (if you don't have it locally anymore)
git clone https://github.com/YOUR_USERNAME/YOUR_PROJECTNAME.git
cd YOUR_PROJECTNAME

# Create a branch for the old version
git branch archive/v1-old
git push origin archive/v1-old

# Create a tag (recommended)
git tag v1.0-final
git push origin v1.0-final

3. Replace main with your new architecture

Now go to your new local folder (the rearchitected code):

cd path/to/your/new/rearchitected-folder

# Initialize git if you haven't already
git init
git add .
git commit -m "feat: complete rearchitecture of the website"

# Link to the existing GitHub repo
git remote add origin https://github.com/YOUR_USERNAME/YOUR_PROJECTNAME.git

# Force push the new code to main
git branch -M main
git push -u origin main --force

Final Result

Bonus: Make it clearer

After pushing, edit the README.md in the new main and add this at the top:

> **Note**: This is a complete rearchitecture.  
> Old version is available in the branch [`archive/v1-old`](https://github.com/YOUR_USERNAME/YOUR_PROJECTNAME/tree/archive/v1-old)  
> and tagged as `v1.0-final`.

This is the simplest clean way — no need to rename the repo or create a new one.

Would you like me to give you the exact commands in one copy-paste block?