effect-v4-schema

Design, validate, and debug Effect v4 Schema definitions.

2|Updated Jul 2, 2026
One-click install
npx skills add https://github.com/spencerbeggs/effected --skill effect-v4-schema
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: effect-v4-schema
Source: https://github.com/spencerbeggs/effected/tree/main/plugin/skills/effect-v4-schema
Command: npx skills add https://github.com/spencerbeggs/effected --skill effect-v4-schema

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill resolves the complexity of designing, reviewing, and debugging Effect v4 Schemas, preventing common pitfalls like constructor collisions, incorrect optionality, and serialization failures.

Core Features & Use Cases

  • House Rules & Best Practices: Provides an opinionated guide on using Schema.Class, TaggedClass, and proper constructor patterns to ensure type safety and runtime correctness.
  • Advanced Modeling: Offers deep insights into recursive schemas, branding, custom Equal/Hash implementations, and complex transformations.
  • Use Case: When migrating from Effect v3 to v4 or building a new monorepo, use this Skill to verify your schema definitions against the latest beta, ensuring your codecs and transformations are robust and performant.

Quick Start

Use the effect-v4-schema skill to review my current Schema.Class definition for potential constructor collisions and ensure my optional fields follow the exact-optional contract.

Frequently Asked Questions about effect-v4-schema

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

FAQPage Schema
How do I prevent constructor collisions in Effect v4 Schema.Class definitions?

Preventing constructor collisions in Effect v4 Schema involves using proper Schema.Class patterns and tagged unions to ensure type safety and runtime correctness during data modeling.

How does Effect v4 handle exact-optional contracts for optional schema fields?

Effect v4 enforces exact-optional contracts by applying strict optionality rules to Schema definitions, ensuring optional fields adhere precisely to expected structural refinements and preventing serialization failures.

What is the best way to migrate schemas from Effect v3 to v4?

Migrating schemas from Effect v3 to v4 requires reviewing existing definitions against the latest beta standards, verifying custom codecs, transformations, and class-based patterns for performance and robustness.

Can I build recursive schemas and custom codecs in Effect v4?

Yes, Effect v4 supports building recursive schemas and custom codecs, offering deep modeling insights and complex transformations to maintain robust data serialization boundaries and structural refinements.

Why do my Effect v4 schemas fail during serialization?

Effect v4 schemas fail during serialization due to incorrect optionality, constructor collisions, or missing tagged unions; debugging these definitions ensures adherence to house standards and prevents runtime failures.

Do I need TypeScript to use Effect v4 Schema for data modeling?

TypeScript is required for Effect v4 Schema data modeling because it leverages functional programming paradigms and type safety to ensure runtime correctness, validation, and robust structural refinements.