code Skill | Agent Skills

Always reuse. Split identical functions, turn magic number/string to named const
Clean redundant or fallback code
Update references e.g. sync frontend fetch urls after editing backend
Preserve existing code comments, don't clutter by adding more

<syntax-rules> - Use modern syntax e.g. C++26, ES2026 (const, arrow functions, async/await) - Concise is more readable. So omit explicit type-safety, nulls, validation if language can auto-infer. Example: * Do: `return;`, `if (variable)` * Don't: `return null`, `if (variable != null)`, `if (variable > 0)` - Omit `|| fallback text` in console.log(error.message) - Use double equal, shorter than triple

Variable & function naming:

Generic 1-2 words. Example:

Do: onSubmit, listVideos // on prefix is shorter
Don't: handleSubmitButton, listVideosWithTitle

Short but don't abbreviate terms: Use event not e </syntax-rules>

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