CAST AI Skill Pack

18 production-grade Claude Code skills for Kubernetes cost optimization with CAST AI

What Is CAST AI?

CAST AI is an all-in-one Kubernetes cost optimization, autoscaling, and security platform. It connects to EKS, GKE, and AKS clusters to:

• Autoscale nodes by adding right-sized instances and removing underutilized ones
• Use spot instances with automatic diversity and fallback to on-demand
• Right-size workloads via pod-level resource recommendations (Workload Autoscaler)
• Hibernate clusters on schedule for dev/staging environments
• Scan for security issues with the Kvisor runtime agent

Typical savings: 50-70% on cloud compute costs. The platform uses a REST API at api.cast.ai with X-API-Key header authentication and provides a Terraform provider for infrastructure-as-code management.

This skill pack provides real API calls, Helm commands, and Terraform configurations for every stage of CAST AI adoption.

Installation

/plugin install castai-pack@claude-code-plugins-plus

Skills Included

Getting Started (S01-S04)

| Skill | Description | |-------|-------------| | castai-install-auth | Helm agent install, API key setup, Terraform provider config | | castai-hello-world | First API calls: list clusters, savings report, node inventory | | castai-local-dev-loop | Dev cluster policies, Terraform plan-apply loop, savings scripts | | castai-sdk-patterns | TypeScript/Python REST API client wrappers with retry and types |

Core Workflows (S05-S08)

| Skill | Description | |-------|-------------| | castai-core-workflow-a | Configure autoscaler policies, spot instances, node templates | | castai-core-workflow-b | Workload Autoscaler: pod right-sizing, annotations, scaling policies | | castai-common-errors | Agent CrashLoop, nodes not scaling, spot fallback, evictor issues | | castai-debug-bundle | Collect agent logs, Helm releases, policies, and events for support |

Operations (S09-S12)

| Skill | Description | |-------|-------------| | castai-rate-limits | API rate limit detection, exponential backoff, request queuing | | castai-security-basics | API key rotation, RBAC audit, Kvisor agent, network policies | | castai-prod-checklist | Phase 1 to Phase 2 go-live checklist with validation commands | | castai-upgrade-migration | Helm chart upgrades, Terraform provider updates, rollback procedures |

Pro Skills (P13-P18)

| Skill | Description | |-------|-------------| | castai-ci-integration | GitHub Actions savings gate, Terraform plan validation in CI | | castai-deploy-integration | Multi-cloud Terraform modules for EKS, GKE, and AKS onboarding | | castai-webhooks-events | Event notifications, Slack integration, audit log API, CronJob summaries | | castai-performance-tuning | Headroom config, instance family selection, API caching for dashboards | | castai-cost-tuning | Spot strategies, right-sizing analysis, cluster hibernation, cost tracking | | castai-reference-architecture | Multi-cluster Terraform module structure with per-environment policies |

Quick Start

1. Install the Pack

/plugin install castai-pack@claude-code-plugins-plus

2. Get Your API Key

Sign up at console.cast.ai, navigate to API > API Access Keys, and create a Full Access key.

3. Connect Your First Cluster

export CASTAI_API_KEY="your-key"

# Add Helm repo
helm repo add castai-helm https://castai.github.io/helm-charts
helm repo update

# Install monitoring agent
helm upgrade --install castai-agent castai-helm/castai-agent \
  -n castai-agent --create-namespace \
  --set apiKey="${CASTAI_API_KEY}" \
  --set provider="eks"

4. Check Your Savings

export CASTAI_CLUSTER_ID="your-cluster-id"

curl -s -H "X-API-Key: ${CASTAI_API_KEY}" \
  "https://api.cast.ai/v1/kubernetes/clusters/${CASTAI_CLUSTER_ID}/savings" \
  | jq '{monthly: .monthlySavings, percent: .savingsPercentage}'

5. Enable Autoscaling

Follow castai-core-workflow-a to configure autoscaler policies and start saving.

Key CAST AI Links

• CAST AI Console -- cluster management dashboard
• CAST AI Docs -- getting started guide
• API Reference -- OpenAPI spec
• Terraform Provider -- IaC modules
• Helm Charts -- agent and component charts
• GitHub -- open-source components
• CAST AI Status -- platform status page

License

MIT