Agent Skills: backend-development

Use this skill when the user asks about "async patterns", "Promise.all", "parallel execution", "Firebase functions", "webhook handlers", "cron jobs", "cold start", "timeout", "pubsub", "background processing", "message queue", "fan-out", "event-driven", or any Node.js/Firebase backend patterns. Provides async/await patterns, function configuration, Pub/Sub messaging, and scalable background processing.