All Go Patterns

Published Go pattern articles organized by category. The focus is on idiomatic Go, not one-to-one class diagram translations.

Category
Complexity

30 patterns

Creational

5 published

Patterns for object creation in Go, usually expressed through constructor functions, interfaces, and functional options.

Creational
Interactive

Abstract Factory in Go

Create related objects through one factory so whole product families can change together without leaking concrete types.

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Creational
Interactive

Builder in Go

Separate a multi-step construction workflow from the final representation so the same input can produce different outputs cleanly.

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Creational
Interactive

Factory Method in Go

Use constructor functions and small interfaces to select concrete implementations without coupling callers to them.

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Creational
Interactive

Prototype Pattern in Go

Clone preconfigured object graphs when copying is simpler or faster than rebuilding the same structure from scratch.

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Creational
Interactive

Singleton Pattern in Go

Use sync.Once carefully for one-time initialization, and understand when dependency injection is a better fit.

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Structural

7 published

Patterns for composing types and boundaries in Go with interfaces, embedding, adapters, and focused packages.

Structural
Interactive

Adapter in Go

Wrap an incompatible API behind the interface your application already expects so the rest of the code stays unchanged.

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Structural
Interactive

Bridge in Go

Separate an abstraction from its implementation so both sides can vary independently without multiplying concrete types.

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Structural
Interactive

Composite in Go

Treat individual objects and object groups uniformly so recursive tree structures stay simple to traverse and aggregate.

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Structural
Interactive

Decorator in Go

Add behavior around an object dynamically by wrapping it with small focused layers that share the same interface.

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Structural
Interactive

Facade in Go

Provide one simplified entry point over several collaborating subsystems so callers can trigger a workflow without knowing every step.

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Structural
Interactive

Flyweight in Go

Share intrinsic immutable state across many small objects so large collections stay cheaper in memory and easier to manage.

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Structural
Interactive

Proxy in Go

Control access to another object by standing in front of it to add caching, authorization, rate limiting, or lazy loading.

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Behavioral

10 published

Patterns for organizing control flow, workflows, and collaboration with explicit errors, interfaces, and small units of behavior.

Behavioral
Interactive

Chain of Responsibility in Go

Build validation and request-processing pipelines with small handlers composed through interfaces.

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Behavioral
Interactive

Command Pattern in Go

Encapsulate operations for queuing, audit history, and undo/redo while keeping Go error handling explicit.

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Behavioral
Interactive

Iterator in Go

Traverse a collection without exposing its internal representation, keeping traversal state separate from the aggregate.

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Behavioral
Interactive

Mediator in Go

Centralize communication between collaborating objects so they depend on a coordinator instead of referencing each other directly.

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Behavioral
Interactive

Memento in Go

Capture and restore object state without exposing internal details so undo and rollback remain explicit and controlled.

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Behavioral
Interactive

Observer in Go

Notify dependent subscribers when state changes so event-driven reactions stay decoupled from the publisher.

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Behavioral
Interactive

State in Go

Change an object’s behavior when its internal state changes by delegating transitions and rules to state-specific types.

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Behavioral
Interactive

Strategy in Go

Encapsulate interchangeable algorithms behind one interface so callers can swap behavior without branching on concrete rules.

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Behavioral
Interactive

Template Method in Go

Define the skeleton of an algorithm once while letting concrete steps vary through narrow hook methods.

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Behavioral
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Visitor in Go

Add operations across a stable object structure without changing each node type whenever a new operation is introduced.

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Agentic

8 published

Patterns for building AI agent systems in Go: reasoning loops, tool dispatch, memory, retrieval, and multi-agent coordination.

Agentic
Interactive

Agent Loop (ReAct) in Go

Drive an agent by alternating reasoning and acting steps inside a structured loop that terminates when the model signals a final answer.

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Agentic
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Tool Use in Go

Register typed tools by name so an agent can dispatch LLM-selected function calls to the right handler without embedding dispatch logic in the agent itself.

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Agentic
Interactive

Orchestrator-Subagent in Go

Decompose a complex task by having a root agent spawn and coordinate specialized subagents, each responsible for one concern, then aggregate their results.

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Agentic
Interactive

Memory in Go

Give an agent a pluggable memory store — short-term context buffer, episodic session history, and optional long-term semantic store — through one interface so the storage backend can be swapped.

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Agentic
Interactive

Retrieval-Augmented Generation in Go

Ground LLM responses in authoritative documents by retrieving relevant chunks before generation so the model can cite real data instead of hallucinating.

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Agentic
Interactive

Human-in-the-Loop in Go

Pause agent execution at defined checkpoints to request human approval or input, then resume with the human's decision injected back into the agent's context.

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Agentic
Interactive

Prompt Template in Go

Build prompts from versioned, parameterized templates so prompt logic stays separate from agent orchestration code and can be tested, diffed, and swapped independently.

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Agentic
Interactive

Multi-Agent Communication in Go

Enable agents to exchange typed messages through a shared message bus so they can collaborate without direct references to each other's implementations.

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