Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/notysoty/openagentskills/react-code-reviewernpx skills add Notysoty/openagentskills --skill react-code-reviewergit clone --depth 1 https://github.com/Notysoty/openagentskillsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00018 | $0.00563 |
| Opus 5 | $0.00009 | $0.00282 |
| Sonnet 5 | $0.00004 | $0.00113 |
| Haiku 4.5 | $0.00002 | $0.00056 |
Grade A, and why
React Component Reviewer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React Component Reviewer
What this skill does
This skill directs the agent to review a specific React component or file against modern React best practices. It specifically checks for:
- Unnecessary re-renders (missing
useMemo/useCallback) - Accessibility violations (missing ARIA attributes, improper semantics)
- Stale closures in
useEffector event handlers - Prop drilling that could be solved with Context or component composition
- Proper TypeScript typing
How to use
Claude Code / Antigravity
Copy this file to .agents/skills/react-code-reviewer/SKILL.md in your project.
Then ask the agent: "Review components/MyComponent.tsx using the React Component Reviewer skill."
Cursor
Add this prompt to your .cursorrules file or save it as a custom prompt in the Cursor AI pane.
The Prompt / Instructions for the Agent
When asked to review a React component, follow these exact steps:
- Analyze State & Renders: Look for state that could be derived. Identify any expensive calculations not wrapped in
useMemo. Look for object/function definitions inside the render body that are passed as props to memoized children. - Analyze Hooks: Ensure
useEffectdependencies are complete and correct. Check for race conditions in asynchronous effects. - Analyze Accessibility: Verify that interactive elements use
<button>or<a>with properhref. Ensure images havealttext. Check for keyboard navigability. - Format Output: Present your review in the following markdown format:
### 🚀 Performance
- [List findings here]
### ♿ Accessibility
- [List findings here]
### 🏗️ Architecture & Best Practices
- [List findings here]
### 💡 Suggested Refactor
Provide the refactored code block here.
Example
Input to Agent:
"Please review the UserProfile.tsx component."
Output from Agent:
🚀 Performance
- The
formatDatefunction is defined inside the component and passed to a child, causing unnecessary re-renders. It should be moved outside the component or wrapped inuseCallback.♿ Accessibility
- The "Save" div acts as a button but lacks
role="button"andtabIndex={0}. It should be a<button>element.(...continues with suggested refactor)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 70 lines · 18 tokens per session scan A 2d3eb3b1c3ff
React Component Reviewer is a skill published in the GitHub repository Notysoty/openagentskills (9 stars, last pushed 19d ago), licensed MIT. It adds 18 tokens to every session and 563 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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