Conciseness

The body is lean bullet-point guidance with no concept padding (it never explains what CSRF or JWT is) and every section carries project-specific preferences. Not 5 because the full ~20-line JwtAuthFilter class is boilerplate Claude already knows how to write and could be trimmed to the salient pattern.

Actionability

Concrete, executable guidance throughout: named annotations (`@EnableMethodSecurity`, `@PreAuthorize("hasRole('ADMIN')")`, `@Valid`, `@NotBlank`), named tools (Bucket4j, OWASP Dependency Check, Snyk), and a complete JwtAuthFilter implementation. Not 5 because the security-config snippets (`http.csrf(...)`, `http.headers(...)`) are fragments without the surrounding SecurityFilterChain method context, so they are not copy-paste ready.

Workflow Clarity

Sections are coherent and the closing "リリース前チェックリスト" provides ten explicit verification checkpoints covering every prior section. Not 5 because there is no explicit sequence or feedback loop for how to proceed when a check fails (e.g. 'fix, then re-run the checklist'); not 3 because the checklist supplies concrete checkpoints and the structure is easy to follow.

Progressive Disclosure

The body (~120 lines) is well-organized into short, clearly-headed sections with no monolithic wall of text and no nested or buried references (no bundle files exist to reference). Not 5 because the skill exceeds the under-50-line simple-skill threshold and some deeper material (e.g. complete SecurityFilterChain configuration, CSRF token setup) could be split into one-level-deep reference files.

Specificity

The description lists several concrete, specific security domains — "authn/authz, validation, CSRF, secrets, headers, rate limiting, and dependency security in Java Spring Boot services" — with a clear platform qualifier. It falls short of 5 because these are topical areas rather than concrete actions (no verbs like 'review', 'configure', 'audit'), and short of anchor 5's 'multiple specific concrete actions'.

Completeness

The 'what' is clear and specific (best practices across named security domains for Spring Boot services), but there is no 'Use when...' clause or equivalent explicit trigger guidance. Per the judging guidelines, a missing 'when' clause caps completeness at 3.

Trigger Term Quality

Good natural keyword coverage: "Spring Security", "CSRF", "secrets", "rate limiting", "dependency security", "Java Spring Boot" — phrases users would plausibly say. Not 5 because common variations like "authentication", "authorization" (spelled out), "JWT", "login" are missing, and the abbreviated jargon "authn/authz" is less natural than what a user would actually type.

Distinctiveness Conflict Risk

The description carves out a clear niche — "Spring Security... in Java Spring Boot services" — with domain-specific terms (CSRF, authn/authz, Spring Security) that minimize overlap with general coding, validation, or secret-management skills.