---

name: regle-rules description: Regle validation rules — built-in rules from @regle/rules, custom rules with createRule, rule wrappers (withMessage, withParams, withAsync, withTooltip), and rule operators (and, or, xor, not, applyIf, assignIf, pipe). Use when declaring, customizing, composing, or conditionally applying validation rules in a Regle form. For form setup see regle. license: MIT compatibility: Requires Vue 3.3+ and TypeScript 5.1+. Works with any agent supporting the Agent Skills spec. metadata: author: Victor Garcia version: "1.27.0" source: https://reglejs.dev

Regle Rules

Validation rules for Regle. Rules come from @regle/rules, but you can also write your own with createRule, customize them with wrappers, and combine them with operators.

import { useRegle } from '@regle/core';
import { required, email, minLength } from '@regle/rules';

const { r$ } = useRegle(
  { email: '' },
  { email: { required, email, minLength: minLength(5) } }
);

Key Concepts

• All rules are optional by default; add required to enforce a field.
• Built-in rules are imported from @regle/rules; some are factories that take parameters (e.g. minLength(3)).
• Custom rules use createRule for reusability, or an inline function for one-offs.
• Wrappers adapt an existing rule (message, params, async, tooltip) without rewriting it.
• Operators combine or conditionally apply rules.

References

| Topic | Description | Reference | |-------|-------------|-----------| | Built-in Rules | All validation rules from @regle/rules | rules-built-in | | Custom Rules | Inline rules, createRule, reactive parameters, async rules, metadata | rules-custom | | Rule Wrappers | withMessage, withParams, withAsync, withTooltip, chaining | rules-wrappers | | Rule Operators | and, or, xor, not, applyIf, assignIf, pipe | rules-operators |

Related skills

• regle — form setup with useRegle, validation properties, displaying errors, modifiers.
• regle-typescript — typing rules schemas with inferRules and RegleComputedRules.