review-react

review-react is a skill for Claude Code from louisbrulenaudet/monorepo-template. It costs 61 tokens per session (904 once invoked), scanned A, original, Apache-2.0.

A review checklist for React 19, the current major version of the React user-interface library, in a browser app.

In plain words
What is it for?
Use it to review React 19 APIs, Suspense loading boundaries, hooks, compiler readiness, and patterns used with TanStack Router and TanStack Query.
Why use it?
It produces a current, evidence-based plan for improving rendering, data fetching, hooks, and loading behavior without relying on outdated React knowledge.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: model in frontmatter; installed under .agents/ (shared by several agents); mentions AGENTS.md.

Good fit Use it to review React 19 APIs, Suspense loading boundaries, hooks, compiler readiness, and patterns used with TanStack Router and TanStack Query.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/louisbrulenaudet/monorepo-template/review-react
Install

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.

Any agent
npx skills add louisbrulenaudet/monorepo-template --skill review-react
Clone the repo
git clone --depth 1 https://github.com/louisbrulenaudet/monorepo-template

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for review-react

README.md
[![agentmods](https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/review-react/github.svg)](https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/review-react)
Your own site
<a href="https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/review-react"><img src="https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/review-react/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for review-react

Your own site · 80×15
<a href="https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/review-react"><img src="https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/review-react.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 904 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00061 $0.00904
Opus 5 $0.00030 $0.00452
Sonnet 5 $0.00012 $0.00181
Haiku 4.5 $0.00006 $0.00090

Measured 10d ago against content hash 0597d5363cb9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

review-react 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 10d 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.

.agents/skills/review-react/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review React

Review the React 19 usage in front-app for alignment with current official React best practices - rendering patterns, data-fetching composition, and developer experience on a TanStack Router/Query SPA deployed via Cloudflare. Your reply must be a plan of suggested changes: concise, actionable, structured - not only prose.

Invocation

Text after the slash command is additional scope/focus (e.g. "hooks", "Suspense") - narrow the review accordingly.

Ground truth (mandatory)

Your pre-trained knowledge of React may be outdated. Do not draft suggestions from memory alone.

  1. Resolve "React" via the Context7 MCP (resolve-library-idquery-docs): React 19 APIs (use, actions, ref as prop, forwardRef changes), docs guidance on effects and fetching.
  2. Cross-check with the local skill .agents/skills/vercel-react-best-practices/SKILL.md for performance heuristics used by this repo.
  3. For anything Context7 lacks, use Firecrawl search/scrape restricted to the official domain (react.dev) - reference pages and blog posts for the installed major.
  4. Version currency: catalog react/react-dom/@types/react* in pnpm-workspace.yaml vs latest stable; flag removed/deprecated APIs still present in code.
  5. Cite the retrieved source next to every finding; label anything unverifiable as Unverified.

Scope artifacts

  • apps/front-app/src/ - pages/, routes/, hooks/, components/, services/
  • apps/front-app/package.json (React deps, plugins); devtools wiring (@tanstack/react-devtools)
  • Tests under apps/front-app/tests/ (see front-vitest skill for DOM harness conventions)

Analysis axes

  • React 19 adoption: modern APIs used where they replace boilerplate (no unnecessary forwardRef; use with promises/Suspense where idiomatic); no legacy patterns kept out of habit.
  • Effects discipline: effects only for synchronization with external systems; no effect-based derived state or event logic; cleanup correctness.
  • Data flow: server state in TanStack Query, URL state in router search params, ephemeral UI state in components - boundaries respected; no duplicated caches.
  • Rendering & performance: memoization applied per current guidance (compiler-aware defaults, targeted memo/useMemo where proven needed); list keys stable; lazy/route-level code splitting aligned with /review-vite findings.
  • Component hygiene: consistent component structure/naming per nested AGENTS.md; error and Suspense boundaries at route level; accessibility basics (semantics, labels).
  • Version currency: types aligned (@types/react major matches runtime); devtools not leaking into production builds.

Read the full file on GitHub · 62 lines

Changes

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.

  1. 10d ago First seen · 62 lines · 61 tokens per session scan A 0597d5363cb9

Subscribe to this mod's changes

review-react is a skill published in the GitHub repository louisbrulenaudet/monorepo-template (19 stars, last pushed 9d ago), licensed Apache-2.0. It adds 61 tokens to every session and 904 once invoked, about $0.0003 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 2026-08-30.

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