Databases

MANDATORY for all naming decisions - variables, functions, files, folders, classes, database tables, routes, CSS classes. Must be followed when creating or renaming any identifier. Non-negotiable baseline for consistent, readable names across all languages and contexts.

This skill enables Claude to monitor and analyze application error rates to improve reliability. It is used when the user needs to track and understand errors occurring in their application, including HTTP errors, application exceptions, database errors, external API errors, background job errors, and client-side errors. Use this skill when the user asks to "monitor errors", "analyze error rates", "track application errors", or requests help with "error monitoring". It sets up comprehensive error tracking and alerting based on defined thresholds.

データベースの初期データ投入を安全に設計・実装・検証するスキル。開発/テスト/本番のデータ分離、シード戦略、再現性の確保を整理する。Anchors:• Designing Data-Intensive Applications / 適用: データ整合性 / 目的: 参照整合性の担保• Database Reliability Engineering / 適用: 運用設計 / 目的: 本番投入の安全性• Data Quality Principles / 適用: データ品質 / 目的: 再現性と検証性の確保Trigger:Use when planning database seeding, generating test fixtures, separating datasets by environment, or validating seed data quality.database seeding, test data, fixtures, seed strategy, environment separation, data validation

This skill enables Claude to design and visualize database schemas. It leverages normalization guidance (1NF through BCNF), relationship mapping, and ERD generation to create efficient and well-structured databases. Use this skill when the user requests to "design a database schema", "create a database model", "generate an ERD", "normalize a database", or needs help with "database design best practices". The skill is triggered by terms like "database schema", "ERD diagram", "database normalization", and "relational database design".

安全で可逆的なデータベースマイグレーションを設計・運用するスキル。スキーマ変更計画、移行期間、ロールバックまでの実務フローを整理する。Anchors:• Refactoring Databases / 適用: 安全なスキーマ進化 / 目的: 破壊的変更の最小化• Drizzle Kit / 適用: マイグレーション生成 / 目的: 変更管理の自動化• Zero-Downtime Patterns / 適用: 本番適用 / 目的: サービス停止の回避Trigger:Use when planning schema changes, generating migrations, applying them safely, or defining rollback/transition strategies.database migrations, schema change, drizzle kit, rollback, zero downtime

This skill enables Claude to design and visualize database schemas. It leverages normalization guidance (1NF through BCNF), relationship mapping, and ERD generation to create efficient and well-structured databases. Use this skill when the user requests to "design a database schema", "create a database model", "generate an ERD", "normalize a database", or needs help with "database design best practices". The skill is triggered by terms like "database schema", "ERD diagram", "database normalization", and "relational database design".

楽観的更新（Optimistic Updates）パターンの実装スキル。サーバーレスポンス前にUIを即座更新し、失敗時のロールバック機構を提供することで、レスポンシブなユーザー体験を実現します。Anchors:• Designing Data-Intensive Applications (Martin Kleppmann) / 適用: 分散システムにおける楽観的並行制御 / 目的: 競合検出とロールバック戦略の設計• React Query (TanStack) / 適用: onMutate/onError/onSettledフック / 目的: 楽観的更新とロールバックの自動化• SWR Documentation (Vercel) / 適用: optimisticDataとrollbackOnError / 目的: 宣言的な楽観的更新の実装Trigger:Use when implementing instant UI feedback before server response, hiding CRUD latency, implementing optimistic updates with React Query/SWR, designing rollback strategies, or handling conflict states.optimistic update, UI feedback, rollback, React Query, SWR, mutation, conflict resolution

DrizzleORMを使用したデータベーススキーマ設計、マイグレーション、型安全なクエリ構築を専門とするスキル。SQLite、PostgreSQL、MySQLに対応し、TypeScriptの型システムを最大限活用した堅牢なDB層を構築する。Anchors:• Drizzle ORM公式ドキュメント / 適用: スキーマ定義とマイグレーション / 目的: 型安全なDB設計の基盤• TypeScript型システム / 適用: クエリビルダーとスキーマ定義 / 目的: エンドツーエンドの型安全性• Database Design for Mere Mortals (Hernandez) / 適用: リレーション設計 / 目的: 正規化と参照整合性Trigger:Use when defining Drizzle schemas, creating migrations, building type-safe queries, designing relations, or optimizing database performance.drizzle, orm, schema, migration, sqlite, postgresql, type-safe query

This skill enables Claude to implement multi-tier database caching solutions. It is triggered when the user requests database caching, performance improvements, or reduced database load. The skill utilizes Redis, in-memory caching, and CDN layers to optimize database performance by reducing database load, improving query latency, and supporting horizontal scaling with cache-aside, write-through, and read-through patterns. Use this skill when the user mentions terms like "database caching", "improve database performance", "reduce database load", or uses the `/caching` command.

Build queryable capability graphs from manifests using Codex for relationship inference between skills, resources, and capabilities.

This skill enables Claude to track and optimize resource usage across an application stack. It is activated when the user requests insights into resource consumption, performance bottlenecks, or cost optimization opportunities. The skill uses the resource-usage-tracker plugin to monitor CPU, memory, disk I/O, network I/O, file descriptors, database connections, and thread/process counts. Use this skill when the user mentions "resource usage", "performance optimization", "cost optimization", "track resources", or "right-sizing".

Guide PR authoring from creation through review completion. Use when creating/submitting/authoring pull requests, writing PR descriptions, responding to reviewer comments, or implementing review feedback. Covers the full PR lifecycle - creating PRs linked to issues, handling review comments (triaging, responding, implementing suggestions), and getting PRs merged.

This skill uses the database-deadlock-detector plugin to detect, analyze, and prevent database deadlocks. It monitors database lock contention, analyzes transaction patterns, and suggests resolution strategies. Use this skill when the user asks to "detect database deadlocks", "analyze deadlock causes", "monitor database locks", or any requests related to database deadlock prevention and resolution. This skill is particularly useful for production database systems experiencing recurring deadlock issues. The plugin's command `/deadlock` is triggered by these requests.

This skill automates database backups using the database-backup-automator plugin. It creates scripts for scheduled backups, compression, encryption, and restore procedures across PostgreSQL, MySQL, MongoDB, and SQLite. Use this when the user requests database backup automation, disaster recovery planning, setting up backup schedules, or creating restore procedures. The skill is triggered by phrases like "create database backup", "automate database backups", "setup backup schedule", or "generate restore procedure".

Design and build knowledge graphs. Use when modeling complex relationships, building semantic search, or creating knowledge bases. Covers schema design, entity relationships, and graph database selection.

TypeScript expertise for React/Next.js development. Use when writing React components with strict typing, fixing TypeScript errors, handling generic components, or working with TanStack Query types. Focuses on common pitfalls and advanced patterns.

Analyzes and optimizes SQL queries using EXPLAIN plans, index recommendations, query rewrites, and performance benchmarking. Use for "query optimization", "slow queries", "database performance", or "EXPLAIN analysis".

Run comprehensive security vulnerability scans when reviewing code. Automatically uses basic mode (fast, high/medium severity only) for first reviews, advanced mode (comprehensive, all severities) for iterations. Detects SQL injection, XSS, hardcoded secrets, insecure dependencies. Use before approving any code changes or pull requests.

This skill should be used when the user wants to view, display, or show a file stored in the CRM database. This is an orchestration skill that combines downloading from the database and opening with the OS default application. Triggers on requests like "show me the contract from CRM", "display the image from the database", "view the PDF for company X", or "open the attachment from the database".

Designs multi-layer caching strategy with edge CDN, server-side caching, cache invalidation, and CDN configuration. Use for "caching strategy", "CDN setup", "cache invalidation", or "performance optimization".