Vercel Composition Patterns

What This Skill Does

• This skill provides React composition patterns for building flexible and maintainable components.
• It helps developers avoid boolean prop proliferation by using compound components, lifting state, and composing internals.
• It is designed to improve codebases for both humans and AI agents as they scale.

When to Use

Refactoring components with many boolean propsBuilding reusable component librariesDesigning flexible component APIsReviewing component architectureWorking with compound componentsWorking with context providers

Key Features

• Avoids boolean props using composition.
• Structures complex components with shared context.
• Decouples implementation from state management.
• Defines generic interfaces for dependency injection.
• Lifts state into provider components.
• Uses children for composition over render props.

Manual Installation

React Composition Patterns

• Composition patterns for building flexible, maintainable React components.
• Avoid boolean prop proliferation by using compound components, lifting state, and composing internals.
• These patterns make codebases easier for both humans and AI agents to work with as they scale.

When to Apply

Reference these guidelines when:

Refactoring components with many boolean props Building reusable component libraries Designing flexible component APIs Reviewing component architecture Working with compound components or context providers

Rule Categories by Priority

Quick Reference

1. Component Architecture (HIGH)

architecture-avoid-boolean-props - Don't add boolean props to customize behavior; use composition architecture-compound-components - Structure complex components with shared context

2. State Management (MEDIUM)

state-decouple-implementation - Provider is the only place that knows how state is managed state-context-interface - Define generic interface with state, actions, meta for dependency injection state-lift-state - Move state into provider components for sibling access

3. Implementation Patterns (MEDIUM)

patterns-explicit-variants - Create explicit variant components instead of boolean modes patterns-children-over-render-props - Use children for composition instead of renderX props

4. React 19 APIs (MEDIUM)

⚠️ React 19+ only. Skip this section if using React 18 or earlier.

react19-no-forwardref - Don't use forwardRef; use use() instead of useContext()

How to Use

Read individual rule files for detailed explanations and code examples:

rules/architecture-avoid-boolean-props.md rules/state-context-interface.md

Each rule file contains:

Brief explanation of why it matters Incorrect code example with explanation Correct code example with explanation Additional context and references

Full Compiled Document

For the complete guide with all rules expanded: AGENTS.mdReact Composition Patterns

• Composition patterns for building flexible, maintainable React components.
• Avoid boolean prop proliferation by using compound components, lifting state, and composing internals.
• These patterns make codebases easier for both humans and AI agents to work with as they scale.