schemantic

Generate type-safe Dart data classes and JSON schemas from abstract class definitions.

155|26|Updated May 13, 2025
One-click install
npx skills add https://github.com/genkit-ai/genkit-dart --skill schemantic
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: schemantic
Source: https://github.com/genkit-ai/genkit-dart/tree/main/skills/schemantic
Command: npx skills add https://github.com/genkit-ai/genkit-dart --skill schemantic

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill simplifies the creation and management of strongly-typed data structures and their corresponding JSON schemas in Dart, reducing boilerplate code and runtime errors.

Core Features & Use Cases

  • Automatic Schema Generation: Define abstract classes and generate concrete data models with JSON serialization/deserialization.
  • Runtime Validation: Validate arbitrary JSON data against generated schemas.
  • Use Case: When building an API client in Dart, use Schemantic to define request and response models, ensuring type safety and automatic validation against the API's contract.

Quick Start

Use the schemantic skill to generate a Dart data class from the provided abstract schema definition.

Frequently Asked Questions about schemantic

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

FAQPage Schema
How do I generate type-safe Dart data classes from JSON schemas?

You can generate type-safe Dart data classes by defining abstract class definitions, which the Skill uses to automatically produce concrete data models with JSON serialization, deserialization, and runtime validation capabilities.

What is the best way to validate arbitrary JSON data against a Dart data model?

The best way to validate arbitrary JSON data is by using generated JSON schemas from your abstract class definitions, which enables robust runtime validation against the defined API contract.

Can I define recursive structures and unions in Dart data classes?

Yes, you can define recursive structures and unions in Dart data classes. The generator supports these complex types alongside primitive types to facilitate robust data modeling with optional runtime schema access.

Do I need any external dependencies to generate JSON schemas in Dart?

No external dependencies are required to generate JSON schemas in Dart. The Skill operates independently to produce type-safe data classes and corresponding schemas directly from your abstract class definitions.

How do I reduce boilerplate code when building an API client in Dart?

You can reduce boilerplate code by defining abstract request and response models to automatically generate concrete type-safe data classes with built-in JSON serialization and schema validation.

When do I need runtime schema access for Dart data modeling?

You need runtime schema access for Dart data modeling when validating arbitrary JSON data against an API contract. This ensures structured data handling and robust type safety beyond standard compile-time checks.