credential-setup

Shared Skill: Credential Setup — Automatic GitHub Authentication

This skill automates GitHub credential detection and configuration so users never need to manually set up PATs or SSH keys before running a workflow.

---

Trigger

This skill is invoked automatically by leader at the start of every workflow that targets a GitHub repository. It is NOT user-facing — users never need to think about credentials.

---

Detection Sequence

Leader runs these checks in order. The first successful method is used.

Step 1 — Check Environment Variable

echo "${GITHUB_TOKEN:+SET}"

If GITHUB_TOKEN is set, configure git for the target repository:

# Configure the target repo's remote with the token (most reliable method)
cd <TARGET_REPO_CHECKOUT>
git remote set-url origin "https://x-access-token:${GITHUB_TOKEN}@github.com/<owner>/<repo>.git"

# Also configure gh CLI if available
echo "$GITHUB_TOKEN" | gh auth login --with-token 2>/dev/null

CRITICAL: Always configure the target repository's git remote, not just the gh CLI. The token must be embedded in the target repo's remote URL for git push to work.

Step 2 — Check gh CLI Auth

gh auth status 2>&1

If gh is already authenticated, extract the token for git operations:

gh auth token

Step 3 — Check SSH Key

ssh -T git@github.com 2>&1

If SSH returns a successful authentication message (even with exit code 1), SSH is available.

Step 4 — Check Git Credential Helper

git config --global credential.helper

If a credential helper is configured, test it:

git ls-remote https://github.com/<owner>/<repo>.git 2>&1

Step 5 — Ask User

If all automated checks fail, use AskUserQuestion:

I need GitHub access to push fixes and comment on issues.
How would you like to authenticate?

Option 1: Paste a GitHub Personal Access Token (PAT)
  - Go to https://github.com/settings/tokens
  - Create a token with 'repo' and 'issues' scope

Option 2: The environment already has SSH keys configured

Option 3: Set GITHUB_TOKEN environment variable and restart

---

Configuration

Once a working method is found:

For PAT / Token:

# Configure gh CLI (preferred — token stays in gh's secure store)
echo "<TOKEN>" | gh auth login --with-token

# Configure git remote with token (fallback — stores token in .git/config plaintext)
git remote set-url origin "https://<TOKEN>@github.com/<owner>/<repo>.git"

Security note: Embedding the token in the remote URL stores it in .git/config in plaintext. Prefer gh auth login when possible, which uses a secure credential store. If the token-in-URL method is used, it only persists in the local checkout and is not committed.

For SSH:

# Ensure remote uses SSH URL
git remote set-url origin "git@github.com:<owner>/<repo>.git"

---

Verification

After configuration, verify push access for both the target repo and the workspace repo.

Target Repo Verification (HARD GATE)

# MUST run these commands inside the target repo checkout, NOT in StatsClaw or any other repo
cd <TARGET_REPO_CHECKOUT>

# Test write access (PREFERRED — confirms push ability to the actual target)
git push --dry-run origin <branch> 2>&1

# Fallback: test read access (only if push --dry-run is not feasible)
git ls-remote origin 2>&1

CRITICAL: The verification MUST target the actual repository the workflow will push to. Testing against a different repository (e.g., the StatsClaw framework repo) does NOT satisfy this gate. A credential that works for repo A may not work for repo B.

Note: git ls-remote only confirms read access. A read-only token will pass git ls-remote but fail on push. Use git push --dry-run when possible to confirm write access. If --dry-run is not feasible (e.g., no commits yet), proceed with git ls-remote and note in credentials.md that write access is unconfirmed until first push.

If verification fails, retry with the next detection method or ask the user.

Workspace Repo Verification (SOFT GATE — warning, not blocking)

If the workspace repo (.repos/workspace) was acquired in step 2, also verify push access:

cd .repos/workspace

# Configure remote with same token (if using token-based auth)
git remote set-url origin "https://x-access-token:${GITHUB_TOKEN}@github.com/<workspace-repo>.git"

# Test write access
git push --dry-run origin main 2>&1

If workspace repo push verification fails:

• Do NOT block the workflow — workspace sync is not a hard gate
• Warn the user: "Workspace repo push access not confirmed — workflow logs will not be synced."
• Record in credentials.md: Workspace Repo: FAIL — push access not confirmed
• The workflow continues normally; workspace sync is skipped at the end

---

Write Credentials Record

After successful verification, write credentials.md:

# Credential Verification

## Target Repository
Target Repository: <owner/repo>
Remote URL Tested: <url>
Method: <PAT / SSH / gh-cli / env-token>
Test Command: git push --dry-run origin <branch>
Result: PASS
Timestamp: <YYYY-MM-DD HH:MM>

### Verification Log
<exact output>

### Permissions Verified
- [x] Read access (git ls-remote)
- [ ] Write access (git push --dry-run — check if confirmed, or deferred to first real push)
- [x] Issue access (gh issue list)
- [x] PR access (gh pr list)

## Workspace Repository
Workspace Repository: <user-specified workspace repo>
Workspace Repo Status: <PASS / FAIL / NOT_AVAILABLE>
Test Command: git push --dry-run origin main
Result: <PASS / FAIL — reason>
Timestamp: <YYYY-MM-DD HH:MM>

### Notes
<If FAIL or NOT_AVAILABLE: reason and whether user was notified>

---

Cloud Environment Notes

In Claude Code cloud environments:

1. GITHUB_TOKEN is often pre-set — Step 1 usually succeeds
2. gh CLI is usually pre-authenticated — Step 2 is the fallback
3. SSH keys may not be available — Step 3 often fails in cloud
4. If nothing works, the user needs to set GITHUB_TOKEN in their cloud environment's secrets/settings panel

---

Error Messages

Provide clear, actionable error messages:

Situation	Message
No auth found	"No GitHub credentials detected. Please set GITHUB_TOKEN in your environment secrets."
Token expired	"GitHub token is expired or revoked. Please generate a new one at https://github.com/settings/tokens"
Insufficient scope	"Token lacks required permissions. Needs: repo, issues. Please regenerate with correct scopes."
SSH key rejected	"SSH key not authorized for this repository. Please add your key at https://github.com/settings/keys"