Gang of Four structural patterns (7 patterns)
7 skills
5
claude
Design Patterns - Behavioral
Gang of Four behavioral patterns (10 patterns)
/
Plugin design-patterns-behavioral from marketplace agent-skills in mdadul/agent-skills. Commands read from the repo's manifest — 1 month ago.
What it installs
Skills (10)
chain-of-responsibilityTeach and apply the Chain of Responsibility (CoR) pattern to pass requests along a dynamic chain of handlers where each can process or forward the request. Use when users ask about CoR, Chain of Command, middleware pipelines, sequential validation, request bubbling, or comparing CoR to Decorator, Co
commandTeach and apply the Command pattern to encapsulate requests as objects for decoupled invocation, queuing, scheduling, logging, and undo/redo workflows. Use when users ask about Command, Action, Transaction, invoker-receiver decoupling, reversible operations, or comparing Command with Strategy, Chain
iteratorTeach and apply the Iterator pattern to traverse collections without exposing their internal structure. Use when users ask about Iterator, custom traversal algorithms, decoupling traversal from collections, parallel iteration, lazy iteration, or comparing Iterator to for-each loops and language-nati
mediatorTeach and apply the Mediator pattern to centralize collaboration rules among tightly coupled components and eliminate direct component-to-component dependencies. Use when users ask about Mediator, Intermediary, Controller, UI dialog coordination, reusable components, or comparing Mediator with Obser
mementoTeach and apply the Memento (Snapshot) pattern to save and restore object state without breaking encapsulation. Use when users ask about Memento, Snapshot, undo/redo, state history, transaction rollback, or comparing Memento to Prototype or Command.
observerTeach and apply the Observer pattern to implement event-driven one-to-many notifications with dynamic subscription and loose coupling between publishers and subscribers. Use when users ask about Observer, Event-Subscriber, Listener, pub/sub style updates, runtime subscriptions, or comparing Observer
stateTeach and apply the State pattern to replace state-based conditional branches with polymorphic state objects. Use when users ask about State, finite-state machines, eliminating state conditionals, behavior that changes per state, or comparing State to Strategy.
strategyTeach and apply the Strategy pattern to isolate interchangeable algorithms behind a common interface and swap them at runtime without changing context logic. Use when users ask about Strategy, algorithm selection, replacing large conditionals, runtime behavior switching, or comparing Strategy with S
template-methodTeach and apply the Template Method pattern to define an algorithm skeleton in a base class while allowing subclasses to override selected steps without changing overall flow. Use when users ask about Template Method, extracting duplicate algorithm structure, superclass hooks, final template flows,
visitorTeach and apply the Visitor pattern to add new operations to a stable element hierarchy without modifying element classes, using double dispatch. Use when users ask about Visitor, double dispatch, adding behavior to sealed/frozen class hierarchies, separating algorithms from object structures, or co
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