Conciseness

The code blocks and specific pricing figures (e.g., "Savings: 30-72% vs On-Demand", "Up to 90%") earn their tokens, but sections like "Purpose", "When to Use", and generic bullets such as "Use managed services", "Implement caching", "Optimize data transfer" restate knowledge Claude already has with no added specifics. Mostly efficient with some unnecessary explanation — the 3 anchor; not 4 because the generic best-practice bullets and filler sections are more than minor instances of over-explanation.

Actionability

Several complete, executable Terraform blocks (S3 lifecycle configuration, common_tags locals, aws_budgets_budget, autoscaling policy + CloudWatch alarm) are copy-paste ready, and pricing facts include concrete terms and percentages. Not 5 because the Azure and GCP sections and the framework overview offer only high-level directives ("Right-size VMs", "Use reserved capacity", "Set up budget alerts") with no commands or tool-specific steps — minor-to-moderate gaps that keep it below fully executable coverage.

Workflow Clarity

The "Cost Optimization Framework" provides a rough sequence (Visibility → Right-Sizing → Pricing Models → Architecture Optimization) and the closing checklist gives a verification artifact, but there are no validation checkpoints anywhere (e.g., how to confirm utilization data before downsizing, or verifying tag coverage after applying tagging). Steps present, checkpoints missing — the 3 anchor; not 4 because rightsizing/downsizing and batch resource deletion are risky operations with no explicit verify step.

Progressive Disclosure

Section headers are clear and content is scannable, but the body inlines substantial per-cloud reference material (full AWS/Azure/GCP pricing breakdowns) that belongs in separate reference files, and the two cited bundle paths — `references/tagging-standards.md` and `assets/cost-analysis-template.xlsx` — do not exist in the skill bundle, so the references are dangling. This sits between anchor 2 (inline content that belongs in separate files) and anchor 4 (well-placed references); the good section structure plus broken/missing reference targets lands it at 3.

Specificity

Names the domain and four concrete actions — "resource rightsizing, tagging strategies, reserved instances, and spending analysis" — which is several specific capabilities, but coverage has minor gaps (e.g., budget alerts, storage lifecycle, spot capacity are covered by the skill body but not surfaced here). Not 5 because the action list is not comprehensive of what the skill actually addresses; clearly above 3, which expects only 1-2 concrete actions.

Completeness

Explicitly answers both questions: the first sentence states what the skill does ("Optimize cloud costs through resource rightsizing, tagging strategies, reserved instances, and spending analysis") and the second gives explicit trigger guidance ("Use when reducing cloud expenses, analyzing infrastructure costs, or implementing cost governance policies") with concrete trigger phrases. This matches the 5 anchor directly; it is not 4 because the 'when' clause is already explicit and specific rather than needing more detail.

Trigger Term Quality

"reducing cloud expenses", "analyzing infrastructure costs", and "implementing cost governance policies" are natural phrases a user would plausibly say, giving good keyword coverage. Not 5 because common user variations like "cloud bill", "save on AWS/Azure/GCP spending", or provider-specific terms are missing; well above 3's 'some relevant keywords but missing common variations' only partially — a few natural terms are absent, which is exactly the 4 anchor.

Distinctiveness Conflict Risk

Cloud cost optimization is a clear niche with distinct triggers (rightsizing, reserved instances, cost governance) that would not plausibly fire a general infrastructure or FinOps-adjacent skill. Minimal conflict risk, matching the 5 anchor; it is not 4 because there is no meaningful overlap with closely related skills implied by the description.