is-leap-year

Maintain code quality using Biome linting, formatting, and git hooks. Use this when the user asks about linting errors, code formatting, Biome configuration, fixing code style issues, organizing imports, or ensuring code quality standards before commits.

Develop and test API routes in the Next.js App Router. Use this when the user asks to create, modify, test, or debug API endpoints, handle API responses, validate request parameters, or work with the /api directory.

Analyze leap year calculations, calendar systems, and date validation logic. Use this when the user asks about leap year rules, calendar types (Gregorian, Julian, Hebrew, Chinese), year range validation (1582-9999), mathematical formulas, or needs to understand the core leap year detection algorithms.

Optimize SEO, metadata, structured data, and search engine visibility. Use this when the user asks about meta tags, Open Graph, Twitter Cards, Schema.org markup, sitemap.xml, robots.txt, social media previews, or improving search engine rankings.