Skill Claude CodeCodex
Guidance for creating tests, including unit tests for individual parts of code and integration tests for connected parts working together. It also covers test coverage and test strategy.
Skill Claude CodeCodex
A testing guide for analysing requirements, planning tests, implementing coverage, and checking test quality.
Skill Claude CodeCodex
Guidance for designing, building, deploying, and maintaining data pipelines, which move and transform data between sources and destinations. It covers both real-time and batch processing, quality checks, and monitoring alerts.
Skill Claude CodeCodex
A backup and recovery guide for protecting data, checking that backups are intact, and preparing to restore systems after a failure.
Skill Claude CodeCodex
Guidance for designing and managing a database connection pool, which reuses open database connections instead of creating one for every request.
Skill Claude CodeCodex
Guidance for checking database migration scripts, which change a database’s structure or data. It covers safety, performance effects, data integrity, and rollback planning.
Skill Claude CodeCodex
A skill for designing applications that use NoSQL databases, which store data without the traditional table-and-row structure of relational databases. It covers database selection, data models, queries, consistency, transactions, and scaling.
Skill Claude CodeCodex
A database-performance procedure for examining query execution plans, choosing indexes, and improving SQL statements. It also covers database settings, performance monitoring, and standard practices.
Skill Claude CodeCodex
A skill for improving SQL queries, which are instructions used to read or change data in relational databases. It examines execution plans, indexes, syntax, query complexity, and common practices.
Skill Claude CodeCodex
A skill for managing database transactions, which group several database changes into one consistent operation. It covers transaction boundaries, concurrent changes, deadlocks, and distributed transactions across multiple systems.
Skill Claude CodeCodex
A software design pattern for creating families of related objects through one consistent interface, without naming the exact class to create. A design pattern is a reusable approach to a common programming problem.
Skill Claude CodeCodex
A software design pattern that converts one class interface into another interface a client expects.
Skill Claude CodeCodex
A software design pattern that separates an abstraction—what an object does—from its implementation—how it does it. Both parts can then change independently.
Skill Claude CodeCodex
A design pattern that builds a complex object through separate steps, with optional settings chosen along the way.
Skill Claude CodeCodex
A design pattern that passes a request through a sequence of handlers until one of them handles it.
Skill Claude CodeCodex
A design pattern that wraps a request in an object, allowing the request to be stored, passed around, or run later.
Skill Claude CodeCodex
A design pattern that arranges individual objects and groups of objects in a tree, so code can handle both in the same way.
Skill Claude CodeCodex
A design pattern that adds responsibilities to an object at runtime by wrapping it, without changing the object's class.
Skill Claude CodeCodex
A simplified interface that hides the details of a complex system behind one easier entry point.
Skill Claude CodeCodex
A design pattern that creates objects through a shared creation interface without requiring callers to name the exact class.
Skill Claude CodeCodex
A design pattern that shares common data between many small objects to reduce repeated storage.
Skill Claude CodeCodex
A design pattern that represents a small language with rules and uses an interpreter to process expressions written in those rules.
Skill Claude CodeCodex
A method for visiting each item in a collection one at a time, in order.
Skill Claude CodeCodex
A software design pattern that puts one object in charge of coordinating how a group of other objects interact.