Names the domain (SQL) and lists several specific topics (CTEs, window functions, indexing strategies), but describes itself as a 'quick reference' rather than listing concrete actions it performs. It doesn't specify what it does with these topics (e.g., 'generates CTEs', 'explains window functions').

The 'what' is partially addressed (quick reference for SQL patterns), and while 'Triggers on:' provides explicit trigger terms, it lacks a proper 'Use when...' clause explaining the circumstances for selection. The trigger list partially compensates but doesn't fully articulate when to use this skill.

Includes a good set of natural trigger terms that users would actually say: 'sql patterns', 'cte example', 'window functions', 'sql join', 'index strategy', 'pagination sql'. These cover common variations of SQL-related queries.

The description carves out a clear niche around SQL patterns and specific SQL concepts (CTEs, window functions, joins, indexing, pagination). The trigger terms are specific enough to avoid conflicting with general coding or database administration skills.

Extremely lean and efficient. Uses tables for quick reference, minimal prose, no unnecessary explanations of what SQL is or how databases work. Every token serves a purpose as a reference card.

All SQL examples are fully executable and copy-paste ready. The CTE, window function, and pagination examples are concrete and complete. The anti-patterns table provides specific fixes alongside each mistake.

This is a reference/pattern skill rather than a multi-step workflow skill. The single-purpose patterns are each unambiguous and clearly presented. No destructive or batch operations require validation checkpoints.

Clean overview with well-organized sections covering the essentials, then clearly signaled one-level-deep references to detailed materials (window-functions.md, indexing-strategies.md) for deeper dives.