Conciseness

The body is lean routing content that assumes Claude's competence — it never explains what CloudFront or a CDN is, and the us-east-1 note is a genuine operational gotcha. However, the "Cross-service work" section substantially duplicates the last routing note ("Custom domain certificate vs Route 53 DNS cutover … is Route 53 DNS work (see the route53 skill)"), a minor instance of trimmable repetition that fits anchor 4 rather than the every-token-earns-its-place anchor 5.

Actionability

Concrete, actionable dispatch: a Goal→file table naming exact reference paths, an explicit execution directive ("Execute commands using the AWS MCP server when connected … Fall back to the AWS CLI otherwise"), and the us-east-1 region guidance. Per the instruction-only scoring note the absence of code is not penalized, but the body still carries minor gaps — no example customer phrasing per table row and no sample MCP/CLI invocation — so it sits at anchor 4 rather than the fully copy-paste-ready anchor 5.

Workflow Clarity

The single routing action is unambiguous — match the goal in the table, "Read the matching reference in full before acting, then follow its constraints and steps" — and the routing notes explicitly resolve the ambiguous cases (origin protection vs content security, viewer vs origin mTLS, certificate vs DNS cutover). No destructive or batch operations exist at this level, so the validation cap does not apply and the simple-skill guideline for an unambiguous single action yields 5; anchor 4's 'most checkpoints' framing does not fit better because there is nothing to validate in a pure router.

Progressive Disclosure

Verified against the actual bundle: all six table links resolve to real files in references/, the references are one level deep (they contain only external AWS documentation URLs, no nested skill files), and the body is a clean overview with no inlined content that belongs in references. This matches anchor 5 — clear overview, well-signaled one-level-deep references, easy navigation.

Specificity

Lists multiple concrete actions across all six workflows — "creating a distribution, caching", "managing custom-domain TLS certificates (ACM in us-east-1)", "protecting origins with origin access control (OAC), VPC origins, and origin mutual TLS (mTLS)", "securing content with signed URLs and cookies, geographic restrictions, viewer mutual TLS, and edge token validation", "observing traffic with standard and real-time logs" — matching the comprehensive-coverage anchor rather than the minor-gaps anchor at 4.

Completeness

Explicitly answers what ("Configures Amazon CloudFront content delivery across six workflows: …") and when ("Applicable when the customer wants to put CloudFront in front of content, choose pricing, lock an origin, restrict who can view content, or analyze logs") with concrete trigger phrases, and adds not-applicable boundaries. This matches anchor 5; the missing-'Use when' cap at 3 does not apply.

Trigger Term Quality

The when-clause uses natural user phrasing — "put CloudFront in front of content", "choose pricing", "lock an origin", "restrict who can view content", "analyze logs" — plus "custom domain" and "signed URLs", but common synonyms such as "CDN", "accelerate/speed up content", or "cache" are missing. Good coverage with a few natural terms missing fits anchor 4, not the comprehensive synonym coverage of 5.

Distinctiveness Conflict Risk

Occupies a clear CloudFront niche and explicitly disambiguates from the closest sibling — "Not applicable for the Route 53 DNS side of a CloudFront custom domain or failover between distributions, or for pure-Route 53 DNS work (see the route53 skill)" — so conflict risk is minimal, matching anchor 5.