effect-patterns-domain-modeling

Model Effect-TS domains with TaggedError, Option, and Schema validation.

1|1|Updated Feb 12, 2026

Search Tags:#type safety #error handling #domain modeling #effect-ts #schema validation #option type

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npx skills add https://github.com/tomsiwik/dojocho --skill effect-patterns-domain-modeling-tomsiwik

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: effect-patterns-domain-modeling
Source: https://github.com/tomsiwik/dojocho/tree/main/dojos/effect-ts/skills/effect-patterns-domain-modeling
Command: npx skills add https://github.com/tomsiwik/dojocho --skill effect-patterns-domain-modeling-tomsiwik

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the challenges of building maintainable and type-safe applications using Effect-TS by providing proven patterns for domain modeling, error handling, and data validation.

Core Features & Use Cases

Type-Safe Errors: Define and handle domain-specific errors using Data.TaggedError.
Explicit Optionality: Safely manage missing values with the Option type.
Schema-Driven Validation: Define data contracts and validate inputs using Effect/Schema.
Branded Types: Create domain-specific types like Email or UserId for enhanced safety.
Use Case: When developing a new feature in an Effect-TS application that requires robust error handling for user creation, or when defining the structure of incoming API data, this Skill provides the necessary patterns and examples.

Quick Start

Use the effect-patterns-domain-modeling skill to define type-safe errors for your domain.

Frequently Asked Questions about effect-patterns-domain-modeling

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

FAQPage Schema

What is the best way to handle errors in Effect-TS domain modeling?▼

Effect-TS domain modeling handles errors using `Data.TaggedError` to define type-safe, domain-specific errors. This approach ensures compile-time tracking of failure cases, making error handling explicit and robust throughout your application logic.

How do I manage optional values safely with Effect-TS?▼

You manage optional values in Effect-TS using the `Option` type. It provides explicit optionality, replacing nullable values with a type-safe structure that forces you to handle both the presence and absence of data.

How does Schema validation work for incoming API data in Effect-TS?▼

Schema validation in Effect-TS uses `Effect/Schema` to define data contracts and validate inputs. It transforms incoming API data into type-safe branded types like `Email` or `UserId`, ensuring structural correctness before processing.

Do I need prior TypeScript experience to use Effect-TS domain modeling patterns?▼

Yes, using Effect-TS domain modeling patterns requires prior TypeScript experience. The patterns involve advanced concepts like branded types and type-safe error handling, targeting developers building maintainable, strongly typed applications.

Can I use branded types for domain-specific constraints in Effect-TS?▼

Yes, you can use branded types in Effect-TS to create domain-specific types like `Email` or `UserId`. This enhances type safety by preventing invalid data assignments and enforcing domain constraints at compile time.

When should I use Data.TaggedError instead of standard Error objects?▼

Use `Data.TaggedError` instead of standard Error objects when you need type-safe error handling in your domain. It allows the compiler to track specific failure cases, ensuring all domain errors are explicitly handled in your logic.