Backend Scheduling and Cron

Purpose

Implement distributed cron jobs and scheduled tasks with timezone awareness, leader election, and failure recovery so periodic work runs exactly-once across the cluster. Without distributed coordination, cron jobs on multiple instances cause duplicate execution, data corruption, and resource waste.

Agent Protocol

Trigger

Exact user phrases: "cron", "schedule", "scheduled task", "cron job", "job scheduling", "distributed cron", "cron expression", "timezone", "scheduler", "background job", "periodic task", "cron trigger".

Input Context

• Job definitions and their schedule (cron expressions).
• Distributed environment (Kubernetes, multi-instance).
• Existing infrastructure (Redis, PostgreSQL, ZooKeeper).

Output Artifact

Cron job configuration or scheduler code. No file unless requested.