ReactUse is a TypeScript library of reusable React Hooks for browser APIs, state, sensors, animations, and DOM interactions. React developers use it when building React applications that need these common behaviors. The catalogue skills and commands help coding agents discover or work with ReactUse hooks.
Borrowing it
Nothing to install: this file belongs to childrentime/reactuse. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/childrentime/reactuse/main/CLAUDE.mdgit clone --depth 1 https://github.com/childrentime/reactuseWrote 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.
[](https://agentmods.dev/instructions/childrentime/reactuse/claude-md)<a href="https://agentmods.dev/instructions/childrentime/reactuse/claude-md"><img src="https://agentmods.dev/badge/instructions/childrentime/reactuse/claude-md/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.
<a href="https://agentmods.dev/instructions/childrentime/reactuse/claude-md"><img src="https://agentmods.dev/badge/instructions/childrentime/reactuse/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.02515 | $0.02515 |
| Opus 5.5 | $0.01006 | $0.01006 |
| Sonnet 5.5 | $0.00503 | $0.00503 |
| Haiku 4.5 | $0.00251 | $0.00251 |
Grade A, and why
reactuse CLAUDE.md scanned grade A with 1 finding 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 2mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -X POST https://dev.to/api/articles \ How it starts
The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ReactUse - Project Guidelines
Project Overview
ReactUse is a collection of React hooks (@reactuses/core). The website is built with Astro (packages/website-astro).
Development
pnpm install # install dependencies
pnpm lint # eslint
pnpm test # jest, via @reactuses/core
Generated API docs
packages/website-astro/api/{hook}-README{,-zhHans,-zhHant}.md are generated from each
hook's interface.ts by pnpm --filter @reactuses/core gend. The Astro site splices them
into every doc page at the %%API%% marker (src/plugins/remark-api-inject.mjs), and
packages/mcp reads them too.
If you change an interface.ts, re-run gend and commit the result. The remark plugin
drops the marker silently when a file is missing or stale, so the published API table just
keeps showing the old signature with no build error.
AI Agent System (.claude/)
This repo carries a small, Chromium-inspired AI agent system under .claude/ — sized for a
hooks library, not a 35M-line codebase. Map: .claude/README.md.
Engineering workflow (apply to any hook/code task):
- Understand first. Read the real source of the files you'll touch — and at least one similar existing hook — before writing. Don't infer behavior from names.
- Build, reusing what exists. This codebase has a shared util layer and strong conventions; reuse before writing. Browser APIs must be SSR-safe.
- Test. Jest, co-located
index.spec.ts(pnpm --filter @reactuses/core test <name>). - Verify.
pnpm lint+ tests green. Stay on task — no unrelated drive-by edits.
Where to look:
.claude/knowledge-base.md— task → file/utility router. Start here; it tells you which existing code already solves your task..claude/ai-policy.md— you own every line you ship; understand it before review.- Skills (auto-activate):
new-hook,hook-test,hook-docs,pr-description. - Commands:
/new-hook,/pre-pr,/pr-desc.
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.
- 2mo ago First seen · 173 lines · 2,515 tokens per session scan A adc1b3aac240
reactuse CLAUDE.md is an instructions file published in the GitHub repository childrentime/reactuse (1,068 stars, last pushed 8d ago), licensed Unlicense. It adds 2,515 tokens to every session, about $0.0101 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
reactuse CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| reactuse CLAUDE.mdchildrentime/reactuse | Instructions file | 1.1k | 8d ago | Unlicense | A | 2,515 | Claude Code |
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