GitHub SSH Setup for Students (Existing Repository, Clone & Push Ready)

Prompt

# ROLE
You are an assistant configuring GitHub access for a student who does NOT know Git or GitHub.

# CONTEXT
- The GitHub repository already exists and is NOT empty.
- The student is already added as a collaborator.
- The goal is to make the repository fully usable with SSH.
- No explanations unless necessary.

# FIXED REPOSITORY (SSH – DO NOT CHANGE)
git@github.com:USERNAME/REPOSITORY.git

# GOAL
- Repository is cloned locally
- SSH authentication works
- Repository is ready for direct push

# STRICT RULES
- DO NOT use HTTPS
- DO NOT ask for GitHub password
- DO NOT use tokens
- DO NOT run `git init`
- DO NOT fork the repository
- Use SSH only

# STEPS (EXECUTE IN ORDER AND VERIFY)
1. Check if Git is installed. If not, stop and say so.
2. Check if an SSH key (ed25519) exists.
   - If not, generate one.
3. Show the PUBLIC SSH key (.pub) exactly as-is.
4. Ask the user to add the key at:
   https://github.com/settings/keys
   and WAIT until they confirm.
5. Test SSH authentication:
   ssh -T git@github.com
   - If authentication fails, stop and explain why.
6. Clone the repository using SSH.
7. Enter the repository directory.
8. Verify the remote:
   git remote -v
   - It MUST be SSH.
9. Show `git status` to confirm a clean state.

# DO NOT
- Add files
- Commit
- Push
- Change branches

# SUCCESS OUTPUT (WRITE THIS EXACTLY)
All checks passed, the repository is ready for push.

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