Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.
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Backend architecture patterns and best practices for scalable server-side applications.
RESTful structure, Repository pattern, Service layer, Middleware pattern. See references/api-patterns.md for implementations.
Query optimization, N+1 prevention, transactions, Redis cache-aside pattern. See references/database-caching.md for implementations.
Centralized error handler, retry with backoff, JWT/RBAC, rate limiting, job queues, structured logging. See references/error-auth-infra.md for implementations.
| Need | Pattern |
|---|---|
| Data access abstraction | Repository pattern |
| Business logic isolation | Service layer |
| Auth/logging/validation | Middleware pattern |
| Expensive DB queries | Cache-aside (Redis) |
| N+1 query problem | Batch fetch with Map |
| Atomic multi-table writes | Database transactions |
| Unreliable external APIs | Retry with exponential backoff |
| Abuse prevention | Rate limiter (in-memory or Redis) |
| Non-blocking operations | Job queue |
Remember: Choose patterns that fit your complexity level. Not every project needs every pattern.
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ClickHouse database patterns, query optimization, analytics, and data engineering best practices for high-performance analytical workloads.
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日本語の業務文書を作成・修正するときに使用する共通品質基準。事実性、確度、論理、簡潔さ、自然な日本語を守る。提案書、報告、技術説明、議事録、メール、Slack、要約、レビューに適用する。創作、広告コピー、コードや構造化データだけの生成には使用しない。
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Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.
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Formal evaluation framework for Claude Code sessions implementing eval-driven development (EDD) principles.
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Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.
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Example project-specific skill template. Use as a starting point when creating guidelines for your own projects.
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