Agent Skills: issues-workflow

Plan and track work using a GitHub Issues-first workflow with sub-issue hierarchies, issue-branch-PR lifecycle, and auto-close on merge. Use whenever the user needs to organize issues into parent-child hierarchies, manage sub-issues, use closing keywords (Closes/Fixes/Resolves), create branches from issues (gh issue develop), coordinate cross-repo issue workflows, or asks about issue tracking strategy. Do NOT use for creating individual issues (use issue-create instead) or for GitHub Projects board management.