Automation¶

Lango provides three automation systems for scheduling, background execution, and multi-step workflow orchestration. Each system is independently configurable and can be enabled or disabled via configuration flags.

System Comparison¶

Feature	Cron	Background	Workflow
Schedule Type	Cron / interval / one-time	On-demand	DAG-based YAML
Persistence	Ent ORM (survives restarts)	In-memory (ephemeral)	Ent ORM (survives restarts)
Concurrency	Configurable max jobs	Semaphore-controlled	Parallel step execution
Delivery	Multi-channel	Origin channel	Multi-channel + per-step
Session Mode	Isolated or shared	Always isolated	Per-step isolated
Status	Stable	Experimental	Experimental

Enabling Automation¶

Each system is disabled by default. Enable them in your configuration:

Settings: lango settings → Cron Scheduler

{
  "cron": {
    "enabled": true
  },
  "background": {
    "enabled": true
  },
  "workflow": {
    "enabled": true
  }
}

Common Patterns¶

All three systems share the same AgentRunner interface to execute agent prompts, avoiding import cycles between the automation packages and the application layer:

type AgentRunner interface {
    Run(ctx context.Context, sessionKey string, prompt string) (string, error)
}

Results can be delivered to communication channels (Telegram, Discord, Slack) via the ChannelSender / Delivery adapters. Each system supports a defaultDeliverTo configuration option as a fallback when no delivery target is specified per-job or per-workflow.