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Agent skill

React Expert

by RightNow-AI in RightNow-AI/openfang

React expert for hooks, state management, Server Components, and performance optimization

Apache-2.0Auto-check passedFrontend & Design

Install React Expert

skills CLI
$ npx skills add RightNow-AI/openfang --skill react-expert -a claude-code

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

GitHub CLI
$ gh skill install RightNow-AI/openfang react-expert --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/RightNow-AI/openfang.git skills-src && mkdir -p .claude/skills && cp -r skills-src/crates/openfang-skills/bundled/react-expert .claude/skills/react-expert && 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/

Facts

Skill name
react-expert
GitHub stars
18k
Token cost
~759 tokens
SKILL.md length
402 words
Files
1
Skills in repo
68
Repo updated
First seen
Licence
Apache-2.0

At a glance

React expert for hooks, state management, Server Components, and performance optimization

  • Tasks that involve State management
  • SKILL.md covers Key Principles, Techniques, Common Patterns and Pitfalls to Avoid
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Tasks that involve Performance optimization

What it does

React Expert is an agent skill from RightNow-AI/openfang. React expert for hooks, state management, Server Components, and performance optimization

Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Frontend & Design, covering State management and Performance optimization. It works with React. The repository describes itself as: Open-source Agent Operating System. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve State management
  • Tasks that involve Performance optimization

Example prompts

  • “/react-expert”

What it can do on your machine

Read from SKILL.md and the folder at commit acf2587. 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

    No URLs in SKILL.md.

    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

React Expert loads about 759 tokens when it runs. Until then it costs about 26 tokens; SKILL.md has 402 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~26
When it runs · the whole SKILL.md, loaded when a task matches
~759

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 RightNow-AI/openfang at commit acf2587, republished under its Apache-2.0 licence (© RightNow-AI). 402 words, ~759 tokens.

Download SKILL.mdSave it as .claude/skills/react-expert/SKILL.md (or your agent's skills folder).
name
react-expert
description
React expert for hooks, state management, Server Components, and performance optimization

React Development Expertise

You are a senior React developer with deep expertise in hooks, component architecture, Server Components, and rendering performance. You build applications that are fast, accessible, and maintainable. You understand the React rendering lifecycle, reconciliation algorithm, and when to apply memoization versus when to restructure component trees for better performance.

Key Principles

  • Lift state up to the nearest common ancestor; push rendering down to the smallest component that needs the data
  • Prefer composition over prop drilling; use children props and render props before reaching for context
  • Keep components pure: same props should always produce the same output with no side effects during render
  • Use Server Components by default in App Router; add "use client" only when browser APIs, hooks, or event handlers are needed
  • Write accessible markup first; add ARIA attributes only when native HTML semantics are insufficient

Techniques

  • Use useState for local UI state, useReducer for complex state transitions with multiple sub-values
  • Apply useEffect for synchronizing with external systems (API calls, subscriptions, DOM measurements); always return a cleanup function
  • Memoize expensive computations with useMemo and stable callback references with useCallback, but only when profiling shows a re-render problem
  • Create custom hooks to extract reusable stateful logic: function useDebounce<T>(value: T, delay: number): T
  • Use React.lazy() with <Suspense fallback={...}> for code-splitting routes and heavy components
  • Forward refs with forwardRef and expose imperative methods sparingly with useImperativeHandle
Show full SKILL.md (175 more words)Show less

Common Patterns

  • Controlled Components: Manage form input values in state with value={state} and onChange={setter} for predictable data flow and validation
  • Compound Components: Use React context within a component group (e.g., <Tabs>, <TabList>, <TabPanel>) to share implicit state without prop threading
  • Optimistic Updates: Update local state immediately on user action, send the mutation to the server, and roll back if the server responds with an error
  • Key-Based Reset: Assign a changing key prop to force React to unmount and remount a component, effectively resetting its internal state

Pitfalls to Avoid

  • Do not call hooks conditionally or inside loops; hooks must be called in the same order on every render to maintain React's internal state mapping
  • Do not create new object or array literals in render that are passed as props; this defeats React.memo because references change every render
  • Do not use useEffect for derived state; compute derived values during render or use useMemo instead of syncing state in an effect
  • Do not suppress ESLint exhaustive-deps warnings; missing dependencies cause stale closures that lead to subtle bugs

© RightNow-AI, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in crates/openfang-skills/bundled/react-expert of RightNow-AI/openfang.

Open the folder on GitHubat commit acf2587

Compare with similar skills

React Expert 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.

React Expert compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
React Expert this skillRightNow-AI/openfang18k—~759Automated safety check: PassApache-2.0
React Flow Architectaiskillstore/marketplace4304 repos~4kAutomated safety check: PassNone
React Code Reviewgiuseppe-trisciuoglio/developer-kit355—~2.6kAutomated safety check: NotesMIT
React ArchitectFerroxLabs/wayland608—~4.1kAutomated safety check: PassApache-2.0
Frontend Patternskurealnum/dotfiles29019 repos~3.7kAutomated safety check: PassNone
ReactMatrixAges/polywise662—~1.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about React Expert

What does React Expert do?

React expert for hooks, state management, Server Components, and performance optimization. React Expert is an agent skill from RightNow-AI/openfang.

When should I use React Expert?

React Expert fits situations like: tasks that involve State management; tasks that involve Performance optimization.

How do I install React Expert in Claude Code?

Run `npx skills add RightNow-AI/openfang --skill react-expert -a claude-code`. Or copy the skill folder (crates/openfang-skills/bundled/react-expert in RightNow-AI/openfang) into .claude/skills/react-expert in your project. Claude Code loads it when a task matches its description.

How do I install React Expert in Codex?

Run `npx skills add RightNow-AI/openfang --skill react-expert -a codex`. Or copy the skill folder (crates/openfang-skills/bundled/react-expert in RightNow-AI/openfang) into .agents/skills/react-expert in your project. Codex loads it when a task matches its description.

Can I use React Expert 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 RightNow-AI/openfang --skill react-expert -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/react-expert, .gemini/skills/react-expert, .github/skills/react-expert and .opencode/skills/react-expert in your project.

What does React Expert need to run?

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

Does React Expert access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is React Expert 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 React Expert use?

React Expert is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does React Expert use?

About 759 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to React Expert?

Skills that share tags, products or a category with React Expert: React Flow Architect (aiskillstore/marketplace, 430 stars), React Code Review (giuseppe-trisciuoglio/developer-kit, 355 stars), React Architect (FerroxLabs/wayland, 608 stars) and Frontend Patterns (kurealnum/dotfiles, 290 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains React Expert?

RightNow-AI (a GitHub organization) maintains it in RightNow-AI/openfang, which has 18,212 GitHub stars. The repository holds 68 skills in this directory. The repository was last updated on July 2, 2026.

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