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Chain of Responsibilitybehavioral
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Facadestructural
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Prototypecreational
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Criteria	behavioralChain of ResponsibilityView pattern	structuralFacadeView pattern	creationalPrototypeView pattern
Basics
Category	behavioral	structural	creational
Summary	Pass a request through a sequence of handlers until one handles it or the chain ends.	Provide a simplified high-level interface that coordinates a complex subsystem behind a smaller and easier-to-use API.	—
Intent	Pass requests along a chain of handlers until one of them handles the request or the request reaches the end of the chain.	Provide a simplified high-level interface that coordinates a complex subsystem behind a smaller and easier-to-use API.	Specify the kinds of objects to create using a prototypical instance, and create new objects by cloning that prototype.
Decision factors
Problem	A request must pass through multiple possible handlers, but the sender should not need to know which handler will process it.	A client needs to perform a recurring workflow that spans several subsystem classes, but direct coordination makes the code noisy and tightly coupled.	Creating new objects from scratch can be expensive or repetitive when the system needs many similar variants.
Tradeoffs	Requests can become harder to trace because control flows through multiple handlers. A long chain may add overhead if many handlers are checked on every request. It keeps handler logic isolated and easier to extend.	Can become a dumping ground if boundaries are unclear. May obscure useful lower-level capabilities from advanced consumers. Simplifies the most common entry points for the system.	Can be difficult if the object graph contains deep references that need custom clone behavior May require careful handling of mutable state to avoid shared-reference bugs
Practical fit
Languages	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet
Platforms	frontend backend integration	applications apis service layers	Web Backend Mobile UI kits Cross-platform systems
Integration notes	Chain of Responsibility is useful for validation pipelines, support routing, approval flows, and any system where requests may be processed by different handlers in sequence.	Facades are useful when exposing a stable boundary over a multi-service or mixed-language backend, or when presenting a consistent UI entry point over multiple readiness checks.	Prototype is useful when object creation is expensive, when many near-identical objects are needed, or when cloning preconfigured templates is simpler than rebuilding them.