shipping-and-launch

Production-launch playbook covering a full pre-launch checklist (code quality, security, performance, accessibility, infra, docs), feature-flag-gated staged rollout (deploy off → team → 5% canary → 25/50/100), explicit rollout decision thresholds (error rate, p95 latency, client errors, business metrics), monitoring/observability setup, post-launch verification, and a written rollback plan. Use when preparing any production deploy, opening a beta, or migrating data/infrastructure.