aws-agent-skills

Here's an AWS Agent Skill to automate EC2 instance scaling based on CPU utilization:

```python
import boto3

class ScaleEC2Instances:
    def __init__(self):
        self.cloudwatch = boto3.client('cloudwatch')
        self.autoscaling = boto3.client('autoscaling')

    def check_cpu_utilization(self, auto_scaling_group_name):
        # Get CPU utilization metrics for the past 5 minutes
        response = self.cloudwatch.get_metric_statistics(
            Namespace='AWS/EC2',
            MetricName='CPUUtilization',
            Dimensions=[{'Name': 'AutoScalingGroupName', 'Value': auto_scaling_group_name}],
            StartTime=datetime.utcnow() - timedelta(minutes=5),
            EndTime=datetime.utcnow(),
            Period=300,
            Statistics=['Average']
        )
        return response['Datapoints'][0]['Average'] if response['Datapoints'] else 0

    def scale_instances(self, auto_scaling_group_name, desired_capacity):
        self.autoscaling.set_desired_capacity(
            AutoScalingGroupName=auto_scaling_group_name,
            DesiredCapacity=desired_capacity
        )

    def execute(self, auto_scaling_group_name):
        cpu_utilization = self.check_cpu_utilization(auto_scaling_group_name)
        current_capacity = self.autoscaling.describe_auto_scaling_groups(
            AutoScalingGroupNames=[auto_scaling_group_name]
        )['AutoScalingGroups'][0]['DesiredCapacity']

        if cpu_utilization > 70 and current_capacity < 10:
            self.scale_instances(auto_scaling_group_name, current_capacity + 1)
        elif cpu_utilization < 30 and current_capacity > 2:
            self.scale_instances(auto_scaling_group_name, current_capacity - 1)
```

This skill monitors CPU utilization and scales instances up or down based on predefined thresholds. It requires IAM permissions for CloudWatch and AutoScaling services. Error handling includes checking for valid metrics and capacity limits.