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cost-optimization

Cloud cost optimization patterns. AWS reserved instances, spot instances, Savings Plans, right-sizing, S3 tiers, GCP committed use, preemptible VMs, caching strategies, CDN for egress, autoscaling tuning.

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SKILL.md

Full skill instructions

Cost Optimization

When to use

Use when reviewing cloud bills, planning cost reduction, setting up cost governance, or evaluating pricing models across AWS, GCP, or multi-cloud. Covers compute, storage, network, and operational cost patterns.

Core principles

  1. Measure before cutting — rightsizing requires utilization data, not guesses
  2. Tag everything — cannot optimize what cannot be attributed
  3. Right-size before committing — buying reservations for wrong size locks in waste
  4. Dev/​staging should sleep — idle non-production is the largest hidden cost
  5. Egress costs are silent killers — always put CDN in front of public content

References available

  • references/​aws-cost-patterns.md — Reserved instances, spot (up to 90% savings), Savings Plans, right-sizing, S3 tiers
  • references/​gcp-cost-patterns.md — Committed use, preemptible VMs, BigQuery slot pricing, egress optimization
  • references/​general-optimization.md — Caching to reduce compute, CDN for egress, autoscaling tuning, unused resource detection
  • references/​cost-monitoring.md — Budget alerts, anomaly detection, dev auto-stop, showback/​chargeback, FinOps maturity