beat-scheduling

# Beat Scheduling Skill

Provides comprehensive patterns and templates for implementing periodic task scheduling with Celery Beat, including crontab, interval, and solar schedules.

## Use When

- Configuring periodic/scheduled tasks in Celery applications
- Setting up cron-like schedules for recurring jobs
- Implementing interval-based task execution
- Configuring solar-based scheduling (sunrise/sunset triggers)
- Setting up django-celery-beat for database-backed schedules
- Creating dynamic schedules that can be modified at runtime
- Migrating from cron to Celery Beat
- Implementing time-zone aware scheduling

## Core Capabilities

### 1. Crontab Schedule Configuration

Generate crontab-based schedules with precise timing control:

```python
# See templates/crontab-schedule.py for complete implementation
from celery.schedules import crontab

app.conf.beat_schedule = {
    'daily-report': {
        'task': 'tasks.generate_report',
        'schedule': crontab(hour=0, minute=0),  # Midnight daily
    },
    'business-hours': {
        'task': 'tasks.process_orders',
        'schedule': crontab(hour='9-17', minute='*/15', day_of_week='mon-fri'),
    }
}
```

**Key patterns:**
- Daily, weekly, monthly schedules
- Business hours execution
- Complex cron expressions with multiple constraints
- Timezone-aware scheduling

### 2. Interval Schedule Configuration

Simple interval-based recurring tasks:

```python
# See templates/interval-schedule.py for complete implementation
from celery.schedules import schedule

app.conf.beat_schedule = {
    'every-30-seconds': {
        'task': 'tasks.check_status',
        'schedule': 30.0,  # Execute every 30 seconds
    },
    'every-hour': {
        'task': 'tasks.cleanup',
        'schedule': timedelta(hours=1),
    }
}
```

**Key patterns:**
- Fixed interval execution
- Relative vs absolute timing
- Preventing task overlap

### 3. Solar Schedule Configuration

Event-based scheduling using solar calculations:

```python
# See templa