react-composition-patterns
This Claude Code skill provides composition pattern rules for building flexible, maintainable React components that avoid boolean prop proliferation and scale across large codebases. Use it when refactoring components with excessive boolean props, designing reusable component libraries, implementing compound components or context providers, or reviewing component architecture decisions, including React 19 specific API changes.
git clone --depth 1 https://github.com/tech-leads-club/agent-skills /tmp/react-composition-patterns && cp -r /tmp/react-composition-patterns/packages/skills-catalog/skills/(architecture)/react-composition-patterns ~/.claude/skills/react-composition-patternsSKILL.md
# 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 | Priority | Category | Impact | Prefix | | -------- | ----------------------- | ------ | --------------- | | 1 | Component Architecture | HIGH | `architecture-` | | 2 | State Management | MEDIUM | `state-` | | 3 | Implementation Patterns | MEDIUM | `patterns-` | | 4 | React 19 APIs | MEDIUM | `react19-` | ## 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.md`
Finds duplicate business logic spread across multiple components and suggests consolidation. Use when asking "where is this logic duplicated?", "find common code between services", "what can be consolidated?", "detect shared domain logic", or analyzing component overlap before refactoring. Do NOT use for code-level duplication detection (use linters) or dependency analysis (use coupling-analysis).
Detects misplaced classes and fixes component hierarchy problems — finds code that should belong inside a component but sits at the root level. Use when asking "clean up component structure", "find orphaned classes", "fix module hierarchy", "flatten nested components", or analyzing why namespaces have misplaced code. Do NOT use for dependency analysis (use coupling-analysis) or domain grouping (use domain-identification-grouping).
Maps architectural components in a codebase and measures their size to identify what should be extracted first. Use when asking "how big is each module?", "what components do I have?", "which service is too large?", "analyze codebase structure", "size my monolith", or planning where to start decomposing. Do NOT use for runtime performance sizing or infrastructure capacity planning.
Analyzes coupling between modules using the three-dimensional model (strength, distance, volatility) from "Balancing Coupling in Software Design". Use when asking "are these modules too coupled?", "show me dependencies", "analyze integration quality", "which modules should I decouple?", "coupling report", or evaluating architectural health. Do NOT use for domain boundary analysis (use domain-analysis) or component sizing (use component-identification-sizing).
Creates step-by-step decomposition plans and migration roadmaps for breaking apart monolithic applications. Use when asking "what order should I extract services?", "plan my migration", "create a decomposition roadmap", "prioritize what to split", "monolith to microservices strategy", or tracking decomposition progress. Do NOT use for domain analysis (use domain-analysis) or component sizing (use component-identification-sizing).
Maps business domains and suggests service boundaries in any codebase using DDD Strategic Design. Use when asking "what are the domains in this codebase?", "where should I draw service boundaries?", "identify bounded contexts", "classify subdomains", "DDD analysis", or analyzing domain cohesion. Do NOT use for grouping existing components into domains (use domain-identification-grouping) or dependency analysis (use coupling-analysis).
Groups existing components into logical business domains to plan service-based architecture. Use when asking "which components belong together?", "group these into services", "organize by domain", "component-to-domain mapping", or planning service extraction from an existing codebase. Do NOT use for identifying new domains from scratch (use domain-analysis) or analyzing coupling (use coupling-analysis).
AI frontend specialist and design consultant that guides users through a structured discovery process before generating any code. Collects visual references, design tokens, typography, icons, layout preferences, and brand guidelines to ensure the final output matches the user's vision with high fidelity. Use when the user asks to build, design, create, or improve any frontend interface — websites, landing pages, dashboards, components, apps, emails, forms, modals, or any UI element. Also triggers on "build me a UI", "design a page", "create a component", "improve this layout", "make this look better", "frontend", "interface", "redesign", or when the user provides mockups, screenshots, or design references. Do NOT use for backend logic, API design, database schemas, or non-visual code tasks.