Lists multiple specific concrete actions: 'Search code by AST structure', 'Find semantic patterns like function calls, imports, class definitions'. Clearly distinguishes from text-based search by specifying structural/semantic pattern matching.

Clearly answers both 'what' (search code by AST structure, find semantic patterns like function calls, imports, class definitions) and 'when' (explicit 'Triggers on:' clause with multiple natural trigger phrases).

Excellent coverage of natural trigger terms: 'find all calls to X', 'search for pattern', 'refactor usages', 'find where function is used', 'structural search', 'ast-grep', 'sg'. These are phrases users would naturally say when needing this capability.

Clearly distinguishes itself from generic code search or text-based grep by emphasizing AST/structural search, semantic patterns, and the specific tool ast-grep/sg. The distinction from text patterns is explicitly stated, reducing conflict with regular search skills.

The content is lean and efficient, using tables and code examples without unnecessary explanation. It assumes Claude knows what AST search is and jumps straight to syntax and patterns.

Every pattern is a copy-paste ready command with concrete examples across multiple languages. The quick reference table provides executable commands for all common tasks.

For this single-purpose search skill, the workflow is unambiguous: find patterns, optionally preview replacements, then apply. The preview-before-apply pattern (items #8 and #9) provides an implicit validation checkpoint for the destructive rewrite operation.

The skill provides a concise overview with essential patterns inline, then clearly signals one-level-deep references to language-specific patterns, security patterns, and advanced usage in the Additional Resources section.