The body is lean and assumes Claude's competence: short bulleted capability list, tight Constraints and Workflow sections, and no padding explaining what Java, Maven, or Javadoc are. Every line earns its place.

Provides concrete, copy-paste-ready commands throughout: './mvnw validate', './mvnw clean compile', './mvnw javadoc:javadoc', and a numbered workflow with explicit file-handling strategies (overwrite/add/backup/skip).

The four-step workflow is clearly sequenced with an explicit validation checkpoint (validate first, stop immediately if it fails) and a final verification step (compile + javadoc:javadoc), matching the anchor for clear sequence with explicit validation steps.

SKILL.md is a concise overview that signals a single one-level-deep reference (references/170-java-documentation.md), which exists as a real file, with the detail correctly pushed into that reference rather than inlined here.

Lists multiple concrete actions: 'generate or improve Java project documentation', 'README.md files', 'package-info.java files', and 'Javadoc enhancements', matching the anchor for listing several specific concrete actions.

Explicitly answers both what (generate/improve Java documentation across README, package-info, Javadoc) and when ('Use when you need to...' plus 'This should trigger for requests such as...'), meeting the explicit-trigger requirement.

Includes natural phrasings users would say ('Improve the code with documentation', 'Apply documentation', 'Refactor the code with documentation') plus the concrete artifacts README.md and Javadoc, giving good coverage of natural trigger terms.

The niche is clearly Java/Maven documentation generation with specific artifacts, and the trigger phrases are scoped to documentation tasks, making it unlikely to fire for unrelated skills.