Conciseness

The body is lean — terse bullet points plus tight code snippets with minimal concept explanation, assuming Claude's Java competence and letting every section earn its place. It avoids the verbosity penalized at level 2.

Actionability

It provides concrete, executable Java examples (records, Optional map/flatMap, stream pipelines, bounded generics, logging) that are copy-paste ready, matching the fully-executable anchor.

Workflow Clarity

This is a single-purpose standards/reference skill with clear, well-organized sections rather than a multi-step process; per the simple-skills note, content this clear and structured scores 3 without an explicit workflow.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are empty) and none are needed; the ~138-line body is organized into well-labeled sections, which the guidelines allow to score 3 for skills with no external-reference requirement.

Specificity

The description enumerates multiple concrete standardization domains — "命名、不可变性、Optional 使用、流（Stream）、异常、泛型及项目布局" — matching the anchor for listing multiple specific concrete actions.

Completeness

It states what the skill covers (Java coding standards for Spring Boot) but provides no explicit "when to use" trigger guidance; per the guidelines a missing "Use when..." clause caps completeness at 2.

Trigger Term Quality

It names relevant domain terms (Spring Boot, Optional, Stream) a user would plausibly say, but lacks common natural variations and any "Use when..." phrasing, so it sits at the "some relevant keywords but missing common variations" level rather than full coverage.

Distinctiveness Conflict Risk

The Spring Boot Java coding-standards niche with concrete sub-domains is clearly distinguishable and unlikely to trigger for unrelated skills, matching the "clear niche with distinct triggers" anchor.