Github Private Repo SSH Routing

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name: github-private-repo-ssh-routing description: Diagnose and manage SSH keys, host aliases, and Git remotes for GitHub private repositories in multi-repo environments. Use when deploy keys collide, a machine manages multiple private repos, automation or backup scripts push to GitHub, or errors like "Permission denied (publickey)" / "Repository not found" appear despite the repo existing.

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GitHub Deploy Key Routing

Treat GitHub private repo access as a routing problem, not just a Git problem.

Core rules

Use one deploy key per private repository unless a machine user is intentionally chosen.

Use one SSH host alias per key.

Point each repo remote at the correct alias explicitly.

Do not rely on a catch-all Host github.com when multiple deploy keys exist.

Verify SSH first, then Git, then push.

If automation is involved, fix both the live repo remote and the config/script source that writes it.

Canonical pattern

Host github.com-backup
    HostName github.com
    User git
    IdentityFile ~/.ssh/openclaw_backup_ed25519
    IdentitiesOnly yes

git remote set-url origin git@github.com-backup:OWNER/REPO.git

Use this skill when the machine has more than one private GitHub repo, more than one SSH key, or any recurring GitHub automation.

Quick triage

If you need the fastest route:

1. Read references/symptoms.md and match the exact error. 2. Read references/patterns.md and compare the current alias + remote layout. 3. Read references/decision-guide.md only if the identity model itself is still undecided. 4. Read references/openclaw-automation.md only when a script, backup flow, or config value may be rewriting the remote.

Workflow

1. Identify the repo + remote actually in use

Check the local repo path, current remotes, and whether the failing action came from:

an interactive repo command

a backup/sync script

a config file that stores the repo URL

a cron/automation job

If the repo path and the config source differ, do not treat them as the same fix.

2. Identify the key-routing layer

Read references/patterns.md for the standard alias layout. Read references/key-storage-by-system.md when OS-specific key locations or mixed Windows/WSL/macOS behavior may matter.

Ask:

Which SSH alias is the repo using now?

Which key does that alias select?

Is that key actually authorized for this repo?

Is a broad Host github.com rule hijacking traffic?

3. Diagnose by symptom

Read references/symptoms.md and match the exact failure string before changing anything.

4. Choose the right identity model

Read references/decision-guide.md when the user is deciding between:

deploy key

personal SSH key

machine user

Read references/identity-model-boundaries.md when the question is really about where SSH routing ends and GitHub API authority begins — especially for PR merge automation, release creation, or fine-grained PAT vs deploy key decisions.

5. Check automation-specific drift

Read references/openclaw-automation.md when the repo is used by OpenClaw backup/restore, plugins, cron jobs, or config-driven workflows.

6. Fix in the safe order

1. Fix or add the SSH alias. 2. Verify with ssh -G . 3. Test with ssh -T git@. 4. Update the repo remote URL. 5. Update any config/script source that still writes the old remote. 6. Verify with git ls-remote origin. 7. Only then push or pull.

Minimal command set

ls -la ~/.ssh
sed -n '1,200p' ~/.ssh/config
git remote -v
ssh -G  | sed -n '1,40p'
ssh -T git@
git ls-remote origin

Bundled script

For a read-only audit of one local repo, run:

scripts/audit-routing.sh /path/to/repo

The script summarizes:

repo remotes

inferred SSH alias from origin

~/.ssh files and permissions

~/.ssh/config preview

ssh -G summary for the detected alias

Use the script to inspect before editing.

What to report

Root cause in one sentence

Whether the failure is local config, GitHub permission, or both

The minimal fix

Exactly what changed