Agent skill

Mui Base

MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style).

Install Mui Base

skills CLI

$ npx skills add pproenca/dot-skills --skill mui-base -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install pproenca/dot-skills mui-base --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/pproenca/dot-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/mui-base .claude/skills/mui-base && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "mui-base" agent skill from https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base into .claude/skills/mui-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mui-base", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add pproenca/dot-skills --skill mui-base -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install pproenca/dot-skills mui-base --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/pproenca/dot-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/.curated/mui-base .agents/skills/mui-base && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "mui-base" agent skill from https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base into .agents/skills/mui-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mui-base", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add pproenca/dot-skills --skill mui-base -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install pproenca/dot-skills mui-base --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/pproenca/dot-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/.curated/mui-base .cursor/skills/mui-base && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "mui-base" agent skill from https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base into .cursor/skills/mui-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mui-base", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/pproenca/dot-skills.git --path skills/.curated/mui-base

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add pproenca/dot-skills --skill mui-base -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install pproenca/dot-skills mui-base --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/pproenca/dot-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/.curated/mui-base .gemini/skills/mui-base && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "mui-base" agent skill from https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base into .gemini/skills/mui-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mui-base", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install pproenca/dot-skills mui-base

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add pproenca/dot-skills --skill mui-base -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/pproenca/dot-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/.curated/mui-base .github/skills/mui-base && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "mui-base" agent skill from https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base into .github/skills/mui-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mui-base", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add pproenca/dot-skills --skill mui-base -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install pproenca/dot-skills mui-base --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/pproenca/dot-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/.curated/mui-base .opencode/skills/mui-base && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "mui-base" agent skill from https://github.com/pproenca/dot-skills/tree/master/skills/.curated/mui-base into .opencode/skills/mui-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mui-base", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: mui-base
GitHub stars: 214
Token cost: ~1.2k tokens
SKILL.md length: 401 words
Files: 54 (incl. references, assets)
Skills in repo: 182
Repo updated: Aug 15, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style).

Works in 5 steps: Component Patterns (CRITICAL) → Naming Conventions (HIGH) → Organization (HIGH) → …
Tasks that involve Design systems
SKILL.md covers When to Apply, Rule Categories by Priority, Quick Reference and How to Use, plus 2 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Mui Base is an agent skill from pproenca/dot-skills. 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).

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 56 other files, including reference files and assets (for example `AGENTS.md`, `README.md` and `assets/templates/_template.md`).

It sits in Frontend & Design, covering Design systems. It works with GitHub. The repository describes itself as: A collection of AI agent skills following the Agent Skills open format. The licence is MIT.

When your agent uses it

Tasks that involve Design systems

Example prompts

“/mui-base”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

Component Patterns (CRITICAL)
Naming Conventions (HIGH)
Organization (HIGH)
Error Handling (HIGH)
Style (MEDIUM)

What it can do on your machine

Read from SKILL.md and the folder at commit cf93c57. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Mui Base loads about 1.2k tokens when it runs, and up to ~17k if it reads all its reference files. Until then it costs about 93 tokens; SKILL.md has 401 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~93
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~17k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from pproenca/dot-skills at commit cf93c57, republished under its MIT licence (© pproenca). 401 words, ~1,214 tokens.

Download SKILL.mdSave it as .claude/skills/mui-base/SKILL.md (or your agent's skills folder). This skill also uses 53 other files; get the full folder from GitHub.

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

Show full SKILL.md (152 more words)Show less

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 - Category structure and impact levels
Rule template - Template for adding new rules
Example: comp-forward-ref-named
Example: org-component-directory

Source

Extracted from MUI Base UI codebase on 2026-01-17.

Full Compiled Document

For the complete guide with all rules expanded: AGENTS.md

Files

SKILL.md and 53 other files (references, assets) in skills/.curated/mui-base of pproenca/dot-skills.

SKILL.md
AGENTS.md
README.md
assets/templates/_template.md
metadata.json
references/_sections.md
references/comp-context-error-message.md
references/comp-context-undefined-default.md
references/comp-context-value-memo.md
references/comp-forward-ref-named.md
references/comp-hook-namespace-exports.md
references/comp-plain-function-root.md
references/comp-props-destructure-order.md
references/comp-props-parameter-naming.md
references/comp-state-memoization.md
references/comp-use-client-directive.md
references/comp-use-controlled.md
references/comp-use-render-element.md
… and 36 more

Open the folder on GitHubat commit cf93c57

Compare with similar skills

Mui Base next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Mui Base compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Mui Base this skillpproenca/dot-skills	214	—	~1.2k	Automated safety check: Pass	MIT	1 mo ago
Scraps Reviewgetsentry/sentry	45k	—	~1.2k	Automated safety check: Notes	Custom licence	today
Design SystemBuildGreatProducts/builder-os	227	—	~4.8k	Automated safety check: Pass	MIT	3 mo ago
Mui Triagemui/mui-public	106	—	~3.3k	Automated safety check: Pass	MIT	today
Write Issueequinor/design-system	151	—	~362	Automated safety check: Pass	MIT	yesterday
Ingest GitHubbluzir/claude-code-design	106	—	~796	Automated safety check: Pass	None	5 mo ago

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Questions about Mui Base

What does Mui Base do?

MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style). Mui Base is an agent skill from pproenca/dot-skills. MUI Base UI style guidelines for building headless React component libraries (formerly headless-ui-style).

When should I use Mui Base?

Mui Base fits situations like: tasks that involve Design systems.

How do I install Mui Base in Claude Code?

Run `npx skills add pproenca/dot-skills --skill mui-base -a claude-code`. Or copy the skill folder (skills/.curated/mui-base in pproenca/dot-skills) into .claude/skills/mui-base in your project. Claude Code loads it when a task matches its description.

How do I install Mui Base in Codex?

Run `npx skills add pproenca/dot-skills --skill mui-base -a codex`. Or copy the skill folder (skills/.curated/mui-base in pproenca/dot-skills) into .agents/skills/mui-base in your project. Codex loads it when a task matches its description.

Can I use Mui Base in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add pproenca/dot-skills --skill mui-base -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mui-base, .gemini/skills/mui-base, .github/skills/mui-base and .opencode/skills/mui-base in your project.

What does Mui Base need to run?

SKILL.md names no scripts, command-line tools or credentials: Mui Base is instructions for the agent only.

Does Mui Base access the network?

SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.

Is Mui Base safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Mui Base use?

Mui Base is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Mui Base use?

About 1.2k tokens (SKILL.md is roughly 4.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 16k tokens, read only when the agent opens those files.

What are the alternatives to Mui Base?

Skills that share tags, products or a category with Mui Base: Scraps Review (getsentry/sentry, 45k stars), Design System (BuildGreatProducts/builder-os, 227 stars), Mui Triage (mui/mui-public, 106 stars) and Write Issue (equinor/design-system, 151 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Mui Base?

pproenca (a GitHub user) maintains it in pproenca/dot-skills, which has 214 GitHub stars. The repository holds 182 skills in this directory. The repository was last updated on August 15, 2026.

Source: pproenca/dot-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Mui Base

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

MUI Headless UI Best Practices

When to Apply

Rule Categories by Priority

Quick Reference

1. Component Patterns (CRITICAL)

2. Naming Conventions (HIGH)

3. Organization (HIGH)

4. Error Handling (HIGH)

5. Style (MEDIUM)

How to Use

Source

Full Compiled Document

Files

Compare with similar skills

Similar skills

More from pproenca/dot-skills

Related

Questions about Mui Base