[skill-activity] fix(02a): add gh auth status verification and fix checkpoint accuracy

[github-actions]

What was improved

Three consistency issues in workshop/02a-setup-codespace.md (lowest-scoring file at 7.67/10, declining trend):

1. Missing auth verification — the step told learners to run gh --version only, but the surrounding prose claimed they would confirm being logged in to github.com. Added gh auth status as a second verification command so the instructions match what learners actually need to check.

2. Inaccurate checkpoint item — the checkpoint said Codespaces are free for public repositories, but the step instructs learners to create a Private repository. Updated to the accurate statement: Codespaces are available on the free tier (60 h/month), regardless of repository visibility.

3. Misleading TIP callout — the terminal-ready tip linked to the gh aw install troubleshooting page (not yet installed at this step). Replaced with an actionable inline hint to run gh auth login if auth status shows an error.

Learner pain point addressed

Learners could believe their environment was verified when it was not — gh was installed but not confirmed as authenticated. This caused silent failures later when authenticated gh commands ran. The checkpoint mismatch also confused learners who created a private repo as instructed but saw a checkpoint item implying they needed a public one.

Workshop flow impact

All changes are self-contained within 02a-setup-codespace.md. No cross-links or other files affected.

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Generated by 🧩 Workshop Skill Activity Author · 37.8 AIC · ⌖ 6.03 AIC · ⊞ 5.1K · ◷

• expires on Jul 23, 2026, 3:35 AM UTC