spring-data-jpa
Designs and implements Spring Data JPA repositories, projections, query patterns, custom repositories, CQRS read models, entity relationships, and persistence performance fixes for Java 25 and Spring Boot 4 projects. Use when the task needs repository-boundary decisions or concrete JPA implementation patterns from this skill. Do not use for generic SQL help or project-wide migration work that belongs in another skill.
88
85%
Does it follow best practices?
Impact
Pending
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 an excellent skill description that clearly defines its scope with specific JPA-related capabilities, includes strong natural trigger terms that developers would use, and explicitly addresses both when to use and when not to use the skill. The negative boundary clauses are particularly effective for disambiguation in a multi-skill environment.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'repository-boundary decisions', 'projections', 'query patterns', 'custom repositories', 'CQRS read models', 'entity relationships', 'persistence performance fixes'. These are all concrete, well-defined JPA concepts. | 3 / 3 |
Completeness | Clearly answers both 'what' (designs and implements JPA repositories, projections, query patterns, etc.) and 'when' ('Use when the task needs repository-boundary decisions or concrete JPA implementation patterns'). Also includes explicit negative triggers ('Do not use for generic SQL help or project-wide migration work'). | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'Spring Data JPA', 'repositories', 'projections', 'query patterns', 'CQRS', 'entity relationships', 'persistence performance', 'JPA', 'Spring Boot 4', 'Java 25'. These cover the domain well and match how developers naturally describe these tasks. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive with clear niche: Spring Data JPA for Java 25/Spring Boot 4 specifically. The explicit exclusion clauses ('Do not use for generic SQL help or project-wide migration work that belongs in another skill') further reduce conflict risk with adjacent 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 excellent progressive disclosure and workflow clarity. Its main weakness is the lack of any inline executable code examples—all concrete implementation is deferred to external files, which means the skill itself reads more as a decision framework than an actionable implementation guide. There is also some redundancy between the decision tables and the summary patterns section.
Suggestions
Add at least one inline executable code example (e.g., a simple aggregate-root repository or a DTO projection snippet) so the skill is actionable without loading external references for basic cases.
Consolidate the two decision tables into one or remove the second, as they cover overlapping ground and add token cost without proportional clarity gain.
Consider merging the 'High-value patterns to prefer' section into the Critical Rules or removing it, since most of its guidance is already stated in the workflow steps and critical rules.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is mostly efficient and avoids explaining basic JPA concepts, but there's some redundancy between the decision tables and the 'High-value patterns to prefer' section which largely restates guidance already covered in the workflow steps and critical rules. The two decision tables could potentially be merged. | 2 / 3 |
Actionability | The skill provides clear decision frameworks and references to templates/assets, but contains no executable code examples inline. All concrete code is deferred to external reference files and asset templates. The guidance is specific but not copy-paste ready within the skill itself. | 2 / 3 |
Workflow Clarity | The 6-step workflow is clearly sequenced with explicit validation checkpoints in Steps 5 and 6. Step 5 provides a concrete checklist for relationship and transaction boundary validation, and Step 6 identifies specific performance risks to verify. The feedback structure is well-defined for a design-decision skill. | 3 / 3 |
Progressive Disclosure | Excellent progressive disclosure with a clear overview in the main file, well-signaled one-level-deep references to 6 reference files and 5 asset templates. The decision table explicitly maps patterns to which reference to load, making navigation intuitive and preventing unnecessary context loading. | 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.
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