Conciseness

The body is lean — terse bullet lists, bold constraint labels, no background explanation of Spring Data JDBC — with one clear redundancy: the Constraints intro paragraph ('Before applying any Spring Data JDBC changes, ensure the project compiles. If compilation fails, stop immediately.') restates what the MANDATORY and SAFETY bullets immediately repeat. This fits 'Efficient; minor instances of over-explanation that could be trimmed'; not a 5 because of that duplicated constraint text, and not a 3 because nearly everything else earns its tokens.

Actionability

Concrete commands are present ('./mvnw compile', 'mvn clean verify'), the exact reference file to read is named, and edge-case handling is specified. However, workflow step 3 ('Implement or refactor configuration/code following the reference patterns and project conventions') is high-level and no inline example of a change appears, fitting 'Mostly executable guidance; concrete code or commands with minor gaps'. Not a 5 because of those gaps; not a 3 because the executable core (read this file, run this command, stop on failure) is fully specified.

Workflow Clarity

The 4-step workflow has a clear sequence and explicit validation checkpoints (compile before changes, stop on failure, full verify after), matching 'Clear sequence with most checkpoints present; minor validation gaps'. Not a 5 because the error-recovery loop after verification fails (fix and re-verify) is not stated; not a 3 because validation is explicit, not missing — so the destructive/batch cap does not apply.

Progressive Disclosure

The body is a lean overview that defers all detail to a single clearly-signaled, one-level-deep reference — the 'Reference' section links references/312-frameworks-spring-data-jdbc.md, which exists and is a well-structured 1121-line file of rules and good/bad examples with no further nesting. This matches 'Clear overview with well-signaled one-level-deep references; content appropriately split; easy navigation'. Not a 4 because there are no organization gaps — the split is clean and navigation is trivial.

Specificity

The description enumerates multiple concrete capabilities — 'entity design with records, repository pattern, immutable updates, aggregate relationships, custom queries, transaction management, and avoiding N+1 problems' — giving comprehensive coverage of the skill's actions, matching the anchor 'Lists multiple specific concrete actions; comprehensive coverage'. Not a 4 because there are no real gaps in coverage of the skill's stated scope.

Completeness

It explicitly answers both questions: the 'what' via the capability list after the em-dash, and the 'when' via 'Use when you need to use Spring Data JDBC with Java records' plus 'This should trigger for requests such as…' with five concrete trigger phrases — matching the anchor 'Clearly and explicitly answers both what AND when with concrete trigger phrases'. Not a 4 because the 'when' is fully explicit, not merely present.

Trigger Term Quality

Trigger phrases like 'Review Java code for Spring Data JDBC', 'Model Spring Data JDBC aggregates with Java records', and 'Improve optimistic locking or domain events' are natural user phrasings, but all derive from the literal framework name with little synonym variation (e.g., no 'JDBC repositories', 'aggregate roots', or 'record-based entities' phrasings), fitting 'Good keyword coverage; a few natural terms missing'. Not a 5 because synonym variation is thin; not a 3 because the terms present are exactly what users of this framework would say.

Distinctiveness Conflict Risk

It occupies a clear niche (Spring Data JDBC with Java records) and every trigger phrase names JDBC explicitly, so it would not fire for general Spring, JPA, or database skills — minimal conflict risk. Not a 4 because no closely-related sibling skill (e.g., a JPA variant) would plausibly be triggered by these JDBC-specific phrases.