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Use when listing all methods, functions, or classes in a file, exploring unfamiliar code, getting API overviews, or deciding what to read selectively without loading entire files
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Use when implementing any feature or fix using TDD, before writing any implementation code
Use when domain logic leaks into API/Infrastructure, project references violate layer boundaries, or you need to decide between CQS (always), CQRS bus (complex domains), and DDD patterns (invariants and events).
Use when configuring Git hooks in .NET projects before team commits occur, to enforce commit message standards and code formatting automatically
Use before writing any test or implementation task, when observable behavior needs to be captured in business language scenarios and approved by the user before code begins
Use when running mutation testing, killing mutants, verifying test quality, checking mutation score, or analyzing survivors after the test baseline is green
Use when writing tests from the outside-in, defining behavior before code, or any feature where tests should start from observable business behavior and let internal design emerge
| name | extracting-code-structure |
| description | Use when listing all methods, functions, or classes in a file, exploring unfamiliar code, getting API overviews, or deciding what to read selectively without loading entire files |
Always invoke extracting-code-structure skill to extract file structure - do not execute bash commands directly.
These keywords mean use structure tools, NOT grep/search:
These keywords mean use search (Grep tool or extracting-code-structure skill):
Ask yourself:
Get outline/index when:
Just use Read when:
DON'T use grep/rg/Grep tool for:
These are STRUCTURE queries, not SEARCH queries.
Invoke extracting-code-structure skill for extracting file structure (functions, classes, exports) efficiently without reading entire files.
Use ast-grep patterns, Dart/Flutter analyzer, ctags, or language-specific tools to get outlines and signatures. Dart/Flutter and JavaScript/TypeScript support have highest priority.
Tiered approach (try in order):
ast-grep with known patterns - Fast, targeted (highest priority)
Toolchain-specific approaches - When available
Read file - Last resort for exploration
Use structure tools to decide what to read, then read selectively.
Don't read 1000-line files blind. Get an outline first, then read the 50 lines you actually need.
# Get structure and find all methods
ast-grep -r 'function $FUNC($$$ARGS) {$$$BODY}' src/ | fzf | cut -d: -f1 | xargs -I {} bat {}
# Understand API and extract usage
yq '.endpoints' api.yml | fzf | ripgrep -A 10 -B 5
For language-specific extraction patterns, ast-grep examples, ctags usage, and integration strategies, load code structure guide when needing: