factory-pattern

Generate factory functions and builders for runtime-driven object creation.

Updated Apr 10, 2026
One-click install
npx skills add https://github.com/erichugy/agentic.skills --skill factory-pattern
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: factory-pattern
Source: https://github.com/erichugy/agentic.skills/tree/main/factory-pattern
Command: npx skills add https://github.com/erichugy/agentic.skills --skill factory-pattern

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Centralize object creation and hide construction complexity so consumers do not need to know concrete types, configuration wiring, or multi-step initialization logic.

Core Features & Use Cases

  • Factory Functions: Simple factory functions that return different implementations based on environment or config, useful for loggers or storage backends.
  • Registry / Abstract Factory: Open/closed registries that allow adding new product types without modifying consumers, ideal for plugin systems and notification channels.
  • Builder Pattern: Fluent builders for objects with many optional fields or validation requirements, common in query construction and server configuration.
  • Use Case: Replace scattered conditional construction code with a single factory layer to enforce invariants, provide defaults, and enable test doubles.

Quick Start

Generate a factory or builder for your target language that instantiates implementations based on a runtime configuration key such as storage_type or channel_type.

Frequently Asked Questions about factory-pattern

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I centralize object creation and decouple consumers from concrete types in TypeScript or Rust?

Centralize object creation by applying the factory pattern to decouple consumers from concrete types. This hides construction complexity so consumers do not need to know configuration wiring or multi-step initialization logic.

How do I implement a registry for plugin loaders and notification channels?

Implement a registry-based abstract factory to enable open/closed extensibility for plugin loaders and notification channels. This allows adding new product types without modifying existing consumers.

What's the best way to build objects with many optional fields and validation requirements?

Use a fluent builder pattern for objects with many optional fields and validation requirements. This enforces invariants, provides sensible defaults, and is common in query construction and server configuration.

Can I use factory functions to switch storage backends based on runtime configuration?

Yes, you can use factory functions to return different storage backend implementations based on runtime configuration keys like storage_type. This replaces scattered conditional construction code with a single factory layer.

When should I use the factory pattern instead of direct object instantiation?

Use the factory pattern when you need runtime-driven instantiation such as plugin loaders, storage backends, or notification channels. It enforces invariants, provides defaults, and enables test doubles for complex constructors.