121-java-object-oriented-design
Use when you need to review, improve, or refactor Java code for object-oriented design quality — including applying SOLID, DRY, and YAGNI principles, improving class and interface design, fixing OOP concept misuse (encapsulation, inheritance, polymorphism), identifying and resolving code smells (God Class, Feature Envy, Data Clumps), or improving object creation patterns, method design, and exception handling. This should trigger for requests such as Review Java code for object-oriented design; Refactor Java code for object-oriented design; Improve Java code for object-oriented design; Fix OOP concept misuse in Java code. Part of cursor-rules-java project
88
85%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a strong skill description that clearly defines its scope (Java OOP design quality), lists numerous specific capabilities and design principles, and includes explicit trigger guidance. The main minor weakness is the use of second person ('you need to') rather than third person voice, and the trigger examples at the end are somewhat repetitive variations of the same phrase. Overall it would perform very well in a multi-skill selection scenario.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: reviewing, improving, refactoring Java code, applying SOLID/DRY/YAGNI principles, improving class/interface design, fixing OOP concept misuse (encapsulation, inheritance, polymorphism), identifying code smells (God Class, Feature Envy, Data Clumps), and improving object creation patterns, method design, and exception handling. | 3 / 3 |
Completeness | Clearly answers both 'what' (review, improve, refactor Java code for OOP design quality across multiple specific areas) and 'when' (opens with 'Use when you need to...' and includes explicit trigger phrases like 'Review Java code for object-oriented design'). However, uses second person 'you' which is noted but doesn't affect completeness scoring. | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'review Java code', 'refactor Java code', 'SOLID', 'DRY', 'YAGNI', 'encapsulation', 'inheritance', 'polymorphism', 'God Class', 'Feature Envy', 'code smells', 'OOP', 'object-oriented design'. These cover a wide range of terms a developer would naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive — narrowly scoped to Java OOP design quality specifically, with very specific triggers around SOLID principles, code smells, and OOP concepts. Unlikely to conflict with general Java skills, testing skills, or non-OOP refactoring skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
70%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a well-structured skill with a clear workflow and good progressive disclosure to a reference file. Its main weaknesses are moderate verbosity in listing OOP topics Claude already understands, and the lack of any inline code examples — all actionable design guidance is deferred entirely to the reference. The workflow and safety constraints are strong.
Suggestions
Remove or significantly trim the 'What is covered' bullet list and 'When to use this skill' section — these largely restate information Claude can infer from the reference and description.
Add 1-2 inline before/after code examples of common refactorings (e.g., a God Class extraction or a SOLID violation fix) so Claude has immediate actionable patterns without needing to read the full reference.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The 'What is covered' bullet list and 'When to use this skill' section are somewhat redundant with each other and with the description. The constraints and workflow sections are reasonably tight, but the overall content could be trimmed — Claude doesn't need a table of contents of OOP concepts it already knows. | 2 / 3 |
Actionability | The skill provides concrete commands (mvnw compile, mvn clean verify) and a clear workflow, but all actual design guidance is deferred to the reference file. There are no inline code examples of good/bad patterns, so Claude must read the reference before it can act on any OOD improvement. | 2 / 3 |
Workflow Clarity | The workflow is clearly sequenced with explicit validation checkpoints: compile before changes (blocking on failure), read reference, apply changes, then verify with full build. The feedback loop for compilation failure is explicit and the edge cases for ambiguity and missing inputs are addressed. | 3 / 3 |
Progressive Disclosure | The skill provides a clear overview with a single, well-signaled reference to the detailed guide (references/121-java-object-oriented-design.md). Content is appropriately split — the SKILL.md serves as workflow and constraints while deferring detailed patterns to one level of reference. | 3 / 3 |
Total | 10 / 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.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Repository
- jabrena/cursor-rules-java
- Commit
762cb86
- Reviewed
Table of Contents
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