Scheduled-task subsystem for Kairo agents. Owns CronScheduler implementation, cron-expression parser, durable task store, owning-session lock, jitter, REPL idle gate, kill switch, and the create/list/delete/pause/resume/edit/trigger tool set. SPI lives in kairo-api/cron; this module provides the default impl + lifecycle ops.

Built-in tool library for the agent runtime

Cron scheduler auto-configuration for Kairo (lock + jitter + kill switch + lifecycle + delivery routing)