Extremely lean and efficient. No unnecessary explanations of what SQL is or how databases work. Every section is a compact reference table or executable example. Every token earns its place.

All SQL examples are fully executable and copy-paste ready. The code covers CTEs, window functions, pagination with two approaches, and anti-patterns with concrete fixes. No pseudocode or vague descriptions.

This is a reference/cheat-sheet skill rather than a multi-step workflow, so the single-task clarity standard applies. Each section is unambiguous in its purpose and the patterns are clearly organized by topic. No destructive or batch operations require validation checkpoints.

References to `./references/window-functions.md` and `./references/indexing-strategies.md` are well-signaled and one level deep, which is good structure. However, no bundle files are provided, so these references are unverifiable and potentially broken. The inline content is well-organized but the referenced files don't exist.

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.