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java-coding-standards

Spring Bootサービス向けのJavaコーディング標準:命名、不変性、Optional使用、ストリーム、例外、ジェネリクス、プロジェクトレイアウト。

46

Quality

47%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./docs/ja-JP/skills/java-coding-standards/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

62%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a competent Java coding standards skill that covers the right topics with decent code examples, but it over-explains some concepts Claude already knows (standard naming conventions, basic project layout) while under-delivering on others (incomplete code for generics, no test examples). The organization is clear but everything is inline with no progressive disclosure to supporting files.

Suggestions

Remove or significantly trim sections covering knowledge Claude already has (PascalCase/camelCase naming, standard Maven project structure) to improve conciseness.

Add complete, executable code examples for the testing section (e.g., a sample JUnit 5 + AssertJ test) and provide a full implementation for the generics example instead of `{ ... }`.

Consider splitting detailed guidance on testing, exception handling, and project structure into separate referenced files to improve progressive disclosure.

DimensionReasoningScore

Conciseness

Generally efficient with good use of code examples, but includes some guidance Claude already knows (e.g., basic naming conventions, 'cleverness over clarity', standard project structure). The code smell section and some bullet points could be trimmed as they restate common Java knowledge.

2 / 3

Actionability

Provides concrete code examples for naming, immutability, Optional, streams, and logging, but several sections (exceptions, generics, testing, null handling) give only partial guidance with incomplete or placeholder code. The generics example uses `{ ... }` instead of a complete implementation, and testing has no code example at all.

2 / 3

Workflow Clarity

This is a coding standards skill (not a multi-step workflow), so the single-purpose nature means clear, well-organized sections with unambiguous guidance suffice. Each section addresses a distinct concern with PASS/FAIL patterns, making the expected behavior clear.

3 / 3

Progressive Disclosure

Content is reasonably well-structured with clear section headers, but it's a monolithic file with no references to supporting documents. Some sections (like testing expectations, project structure, or exception handling) could benefit from being split into separate reference files, especially given the breadth of topics covered.

2 / 3

Total

9

/

12

Passed

Description

32%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description identifies its domain (Java/Spring Boot coding standards) and lists relevant topic areas, but it reads more like a table of contents than an actionable skill description. It lacks concrete actions (what does it do with these standards?) and completely omits trigger guidance for when Claude should select this skill. The Japanese-only text may also limit discoverability for mixed-language queries.

Suggestions

Add an explicit 'Use when...' clause specifying trigger conditions, e.g., '以下の場合に使用:Javaコードレビュー、Spring Bootプロジェクトのコード規約確認、新規Javaクラス作成時'

Replace the category list with concrete actions, e.g., '命名規則を適用し、不変オブジェクトの設計を指導し、Optional・Stream APIの正しい使い方をレビューする'

Add common English trigger terms alongside Japanese to improve matching, e.g., 'Java coding standards, Spring Boot conventions, code style, best practices'

DimensionReasoningScore

Specificity

The description names the domain (Java/Spring Boot) and lists several topic areas (naming, immutability, Optional usage, streams, exceptions, generics, project layout), but these are categories rather than concrete actions. It doesn't describe what the skill actually does with these topics (e.g., 'enforces', 'validates', 'applies').

2 / 3

Completeness

The description answers 'what' at a high level (coding standards for Spring Boot Java services) but completely lacks any 'when should Claude use it' guidance. There is no 'Use when...' clause or equivalent explicit trigger guidance, which per the rubric should cap completeness at 2, and since the 'what' is also somewhat weak, a score of 1 is appropriate.

1 / 3

Trigger Term Quality

Includes relevant keywords like 'Java', 'Spring Boot', 'コーディング標準' (coding standards), 'Optional', 'ストリーム' (streams), 'ジェネリクス' (generics). However, it's missing common variations users might say such as 'code style', 'best practices', 'code review', 'conventions', and English equivalents that users might mix in.

2 / 3

Distinctiveness Conflict Risk

The combination of 'Spring Boot' + 'Java' + 'コーディング標準' provides some distinctiveness, but it could overlap with general Java coding skills, Spring Boot development skills, or code review skills. The scope is somewhat specific but not sharply delineated.

2 / 3

Total

7

/

12

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation11 / 11 Passed

Validation for skill structure

No warnings or errors.

Repository
affaan-m/everything-claude-code
Reviewed

Table of Contents

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