mk:ghpm

GitHub project management via the gh CLI — create and triage issues, manage GitHub Projects v2 boards (add items, update status fields), manage labels and milestones, and generate handoff-status summaries. Use when "create a GitHub issue", "add to project board", "update sprint status", "create label/milestone", or "give me a handoff summary of open work". NOT for code review (see mk:review-pr); NOT for PR creation…