Review: Single-Issue Deep Validation

Deep-validate a single GitHub issue against the current codebase. Cross-reference file paths, detect already-implemented features, check for related PRs, verify dependencies, and deliver a structured verdict with recommended action.

Workflow

1. Auth Check → 2. Detect Repo → 3. Fetch Issue → 4. Parse Body
→ 5. Codebase Cross-Reference → 6. PR Check → 7. Dependency Check
→ 8. Verdict → 9. Present Report → 10. Interactive Action

Step 1: Verify GitHub Auth

gh auth status

On failure: Stop and tell the user to run gh auth login.