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MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style). This skill should be used when creating unstyled UI components, compound components with render props, accessibility-first patterns, or component libraries that separate log
MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style). This skill should be used when creating unstyled UI components, compound components with render props, accessibility-first patterns, or component libraries that separate logic from styling. Extracted from the MUI Base UI codebase (github.com/mui/base-ui).
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Comprehensive style guide for building headless React component libraries following MUI Base UI patterns. Contains 48 rules across 5 categories, prioritized by impact.
Reference these guidelines when:
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Component Patterns | CRITICAL | comp- |
| 2 | Naming Conventions | HIGH | name- |
| 3 | Organization | HIGH | org- |
| 4 | Error Handling | HIGH | err- |
| 5 | Style | MEDIUM | style- |
comp-forward-ref-named - Use forwardRef with Named Functioncomp-props-parameter-naming - Name Props Parameter componentPropscomp-use-render-element - Use useRenderElement for DOM Renderingcomp-context-undefined-default - Create Context with Undefined Defaultcomp-context-error-message - Context Error Messages with Hierarchycomp-use-controlled - Use useControlled Hook for Dual Modescomp-state-memoization - Memoize State Objectscomp-context-value-memo - Memoize Context Provider Valuescomp-plain-function-root - Plain Function for Non-DOM Rootscomp-hook-namespace-exports - Hook Namespace Exportscomp-props-destructure-order - Props Destructuring Ordercomp-use-client-directive - Add use client Directivename-component-naming - Component Naming as ParentPartname-file-matches-export - File Name Matches Primary Exportname-directory-kebab-case - Directory Naming kebab-casename-part-directory-lowercase - Part Directory Naming lowercasename-context-suffix - Context Naming with Suffixname-context-hook - Context Hook as useComponentContextname-props-interface - Props Interface as ComponentPropsname-state-interface - State Interface as ComponentStatename-namespace-type-exports - Namespace Type Exportsname-event-type - Event Type Naming Conventionname-constants - Constant Naming SCREAMING_SNAKE_CASEname-data-attributes - Data Attribute Naming lowercasename-hooks - Hook Naming with use Prefixname-refs - Ref Variable Naming with Suffixname-handlers - Handler Naming Conventionorg-component-directory - Component Directory Structureorg-dual-barrel-exports - Dual Barrel Export Patternorg-test-colocation - Test File Colocationorg-context-placement - Context File Placementorg-data-attributes-file - Data Attributes Documentation Fileorg-state-attributes-mapping - State Attributes Mapping Fileorg-css-vars-file - CSS Variables Documentation Fileorg-package-exports - Package-Level Wildcard Exportserr-dev-only-warnings - Development-Only Warningserr-deduplicated-warnings - Deduplicated Warning Messageserr-message-prefix - Message Prefix Standarderr-context-error-guidance - Context Error Guidanceerr-prop-validation-timing - Prop Validation Timingerr-cancelable-events - Cancelable Event Patternerr-event-reason-constants - Event Reason Constantserr-typed-event-reasons - Type-Safe Event Reasonsstyle-react-import - React Import as Namespacestyle-internal-imports - Internal Import Pathsstyle-explicit-undefined - Explicit Undefined in Prop Typesstyle-default-values - Default Values in Destructuringstyle-jsdoc-documentation - JSDoc DocumentationRead individual reference files for detailed explanations and code examples:
Extracted from MUI Base UI codebase on 2026-01-17.
For the complete guide with all rules expanded: AGENTS.md
name: mui-base description: MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style). This skill should be used when creating unstyled UI components, compound components with render props, accessibility-first patterns, or component libraries that separate logic from styling. Extracted from the MUI Base UI codebase (github.com/mui/base-ui).
--- name: mui-base description: MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style). This skill should be used when creating unstyled UI components, compound components with render props, accessibility-first patterns, or component libraries that separate logic from styling. Extracted from the MUI Base UI codebase (github.com/mui/base-ui). --- # MUI Headless UI Best Practices Comprehensive style guide for building headless React component libraries following MUI Base UI patterns. Contains 48 rules across 5 categories, prioritized by impact. ## When to Apply Reference these guidelines when: - Building headless/unstyled component libraries - Creating compound components with context-based composition - Implementing accessible UI primitives with ARIA patterns - Using render props and className callbacks for styling flexibility - Writing components that support both controlled and uncontrolled modes ## Rule Categories by Priority | Priority | Category | Impact | Prefix | |----------|----------|--------|--------| | 1 | Component Patterns | CRITICAL | `comp-` | | 2 | Naming Conventions | HIGH | `name-` | | 3 | Organization | HIGH | `org-` | | 4 | Error Handling | HIGH | `err-` | | 5 | Style | MEDIUM | `style-` | ## Quick Reference ### 1. Component Patterns (CRITICAL) - `comp-forward-ref-named` - Use forwardRef with Named Function - `comp-props-parameter-naming` - Name Props Parameter componentProps - `comp-use-render-element` - Use useRenderElement for DOM Rendering - `comp-context-undefined-default` - Create Context with Undefined Default - `comp-context-error-message` - Context Error Messages with Hierarchy - `comp-use-controlled` - Use useControlled Hook for Dual Modes - `comp-state-memoization` - Memoize State Objects - `comp-context-value-memo` - Memoize Context Provider Values - `comp-plain-function-root` - Plain Function for Non-DOM Roots - `comp-hook-namespace-exports` - Hook Namespace Exports - `comp-props-destructure-order` - Props Destructuring Order - `comp-use-client-directive` - Add use client Directive ### 2. Naming Conventions (HIGH) - `name-component-naming` - Component Naming as ParentPart - `name-file-matches-export` - File Name Matches Primary Export - `name-directory-kebab-case` - Directory Naming kebab-case - `name-part-directory-lowercase` - Part Directory Naming lowercase - `name-context-suffix` - Context Naming with Suffix - `name-context-hook` - Context Hook as useComponentContext - `name-props-interface` - Props Interface as ComponentProps - `name-state-interface` - State Interface as ComponentState - `name-namespace-type-exports` - Namespace Type Exports - `name-event-type` - Event Type Naming Convention - `name-constants` - Constant Naming SCREAMING_SNAKE_CASE - `name-data-attributes` - Data Attribute Naming lowercase - `name-hooks` - Hook Naming with use Prefix - `name-refs` - Ref Variable Naming with Suffix - `name-handlers` - Handler Naming Convention ### 3. Organization (HIGH) - `org-component-directory` - Component Directory Structure - `org-dual-barrel-exports` - Dual Barrel Export Pattern - `org-test-colocation` - Test File Colocation - `org-context-placement` - Context File Placement - `org-data-attributes-file` - Data Attributes Documentation File - `org-state-attributes-mapping` - State Attributes Mapping File - `org-css-vars-file` - CSS Variables Documentation File - `org-package-exports` - Package-Level Wildcard Exports ### 4. Error Handling (HIGH) - `err-dev-only-warnings` - Development-Only Warnings - `err-deduplicated-warnings` - Deduplicated Warning Messages - `err-message-prefix` - Message Prefix Standard - `err-context-error-guidance` - Context Error Guidance - `err-prop-validation-timing` - Prop Validation Timing - `err-cancelable-events` - Cancelable Event Pattern - `err-event-reason-constants` - Event Reason Constants - `err-typed-event-reasons` - Type-Safe Event Reasons ### 5. Style (MEDIUM) - `style-react-import` - React Import as Namespace - `style-internal-imports` - Internal Import Paths - `style-explicit-undefined` - Explicit Undefined in Prop Types - `style-default-values` - Default Values in Destructuring - `style-jsdoc-documentation` - JSDoc Documentation ## How to Use Read individual reference files for detailed explanations and code examples: - [Section definitions](references/_sections.md) - Category structure and impact levels - [Rule template](assets/templates/_template.md) - Template for adding new rules - Example: [comp-forward-ref-named](references/comp-forward-ref-named.md) - Example: [org-component-directory](references/org-component-directory.md) ## Source Extracted from [MUI Base UI](https://github.com/mui/base-ui) codebase on 2026-01-17. ## Full Compiled Document For the complete guide with all rules expanded: `AGENTS.md`
Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Review before install
License: MIT
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Codex install prompt
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Quality
67/100
Promising
Trust
65/100
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Audit
77/100
Needs review
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