Agent Skills: team-quality-gate

[Team] Run quality gate checklists for development stages. Covers 4 stage gates (Idea>PBI, PBI>Dev, Dev>QA, QA>Release), compliance verification (architecture, security, accessibility, performance), audit trails, and quality metrics. Triggers on "quality gate", "qa gate", "pre-release", "checklist", "gate check", "compliance", "quality metrics", "QC review".