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 skills add LandonSchropp/agent-toolkit --skill testing-reactgit clone --depth 1 https://github.com/LandonSchropp/agent-toolkitWrote 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/skills/landonschropp/agent-toolkit/testing-react)<a href="https://agentmods.dev/skills/landonschropp/agent-toolkit/testing-react"><img src="https://agentmods.dev/badge/skills/landonschropp/agent-toolkit/testing-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.
<a href="https://agentmods.dev/skills/landonschropp/agent-toolkit/testing-react"><img src="https://agentmods.dev/badge/skills/landonschropp/agent-toolkit/testing-react.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 | $0.00013 | $0.00156 |
| Opus 5.5 | $0.00005 | $0.00062 |
| Sonnet 5.5 | $0.00003 | $0.00031 |
| Haiku 4.5 | $0.00001 | $0.00016 |
Grade A, and why
testing-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 1mo 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.
What it actually says
Testing React Hooks
Use renderHook and act from @testing-library/react. Don't write a probe component — renderHook is the affordance for testing a hook in isolation.
import { useMyHook } from "./use-my-hook.ts";
import { act, renderHook } from "@testing-library/react";
const { result, rerender, unmount } = renderHook(() => useMyHook(arg));
expect(result.current).toBe(/* ... */);
renderHook needs DOM globals. A typical React project provides them through its configured test environment (jsdom or happy-dom), so no per-test setup is required.
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.
- 1mo ago Changed · +1 lines · +3 tokens per session 82be989395f1
- 1mo ago First seen · 18 lines · 10 tokens per session scan A ab0e08b4a84f
testing-react is a skill published in the GitHub repository LandonSchropp/agent-toolkit (3 stars, last pushed yesterday), licensed MIT. It adds 13 tokens to every session and 156 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-03.
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