Conciseness

The ~22-line body is lean and efficient: every step carries substantive guidance ("Read the project's infrastructure definitions before proposing changes", "Distinguish observed configuration from proposed changes") with no concept explanations Claude already knows and no padding. Every token earns its place.

Actionability

As an instruction-only routing skill, the guidance is concrete and specific: what to gather in step 1, to "request authorized read-only inventory", and exactly what a plan must contain ("resource boundaries, IAM access, networking, cost assumptions, and a validation/rollback plan"). It stays a 4 rather than 5 because the routing step ("Open the upstream AWS skill collection... and select the workflow") gives no concrete mechanism for accessing or searching that collection.

Workflow Clarity

The six-step sequence is clear with an explicit pre-change checkpoint ("Review the plan with the user before any operation that creates, modifies, or deletes cloud resources") and a closing verification step ("Verify the result against the requested requirements and report which checks ran"). It is a 4 rather than 5 because there is no explicit error-recovery/feedback loop if verification fails or the upstream guidance is only partially applicable.

Progressive Disclosure

The skill is under 50 lines with no bundle files (references/, scripts/, assets/ are absent) and no need for external references; the body is well-organized into When to Use, Workflow, Example, and Limitations sections with the single upstream URL clearly signaled. Per the rubric's simple-skill guideline this warrants a 5.

Specificity

"Plan and review AWS architecture and infrastructure changes" names the domain and two concrete actions (plan, review), matching the anchor for 1-2 concrete actions. It is not a 4 because no further specific actions or coverage are listed (e.g., IAM, networking, cost review), and not a 2 because the actions are concrete and domain-anchored rather than generic.

Completeness

The 'what' is clear (plan and review AWS architecture/infrastructure changes), but there is no 'Use when...' or equivalent trigger clause, so per the judging guideline completeness is capped at 3. Not a 2 because the 'what' is explicit and specific rather than vague.

Trigger Term Quality

Relevant natural keywords like "AWS", "architecture", and "infrastructure" are present, but common variations users would say are missing: "cloud", "deploy/deployment", "Terraform", "CloudFormation", or "IaC". This matches 'some relevant keywords but missing common variations or synonyms' rather than good coverage.

Distinctiveness Conflict Risk

"AWS architecture and infrastructure changes" carves out a clear niche that is unlikely to trigger for unrelated skills, though it could overlap with closely related AWS/cloud or general infrastructure skills. Mostly distinct with minor overlap risk, so 4 rather than the fully distinct 5.