Validation

Core validation in Arc provides shared TypeScript/JavaScript primitives and generated rules that run before command and query requests.

This page is an overview of validation capabilities. Use the pages below for specific implementation details.

Capabilities

Capability	What It Covers	Learn More
Fluent rules API	Programmatic rule definition, built-in rules, and custom messages	Rules And Fluent API
Command/query integration	Automatic pre-flight validation behavior for commands and queries	Command And Query Integration
Validation payloads	Result shape, severities, and diagnostics	Validation Results
Severity-based execution gating	Warning/information filtering and confirmation flows	Severity Filtering

Related Topics

• Core Commands
• Core Queries
• Backend Command Validation
• Backend Query Validation
• Proxy Generation Validation