The body is lean: it jumps straight to best-practice rules and copy-paste examples without explaining what IntelliJ or AnAction is, so every token earns its place.

It provides fully executable, copy-paste-ready Kotlin, plugin.xml, and Bundle.properties snippets alongside concrete 'NEVER'/'Define' rules, matching the executable-code anchor.

As a simple single-purpose skill under 50 lines, it gives a clear numbered convention (set id, optionally set icon, set text/description in the bundle); there are no destructive or batch operations that would require validation checkpoints.

The skill is under 50 lines and well-organized into Documentation, Best Practices, and a Good example section, with a single clearly signaled one-level-deep reference link to the Action-System doc.

Names the IntelliJ-actions domain and the concrete verbs 'implementing', 'create', and 'change an action', but does not enumerate multiple specific actions (e.g. register id, set icon, define bundle text), so it stops short of the comprehensive list anchor.

It states what the skill does ('Guidelines for implementing IntelliJ actions (AnAction)') and gives an explicit 'Use when you need to create or change an action' trigger, satisfying both the what and the when.

Natural trigger phrases a plugin developer would actually say — 'IntelliJ actions', 'AnAction', 'create or change an action' — are present, covering both lay and technical forms of the niche.

The IntelliJ AnAction niche is platform-specific and distinct; the triggers are narrow enough that it is unlikely to fire for unrelated skills.