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.
git clone --depth 1 https://github.com/GoogilyBoogily/googilyboogily-claude-power-toolsWrote 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/agents/googilyboogily/googilyboogily-claude-power-tools/nextjs-expert)<a href="https://agentmods.dev/agents/googilyboogily/googilyboogily-claude-power-tools/nextjs-expert"><img src="https://agentmods.dev/badge/agents/googilyboogily/googilyboogily-claude-power-tools/nextjs-expert/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/agents/googilyboogily/googilyboogily-claude-power-tools/nextjs-expert"><img src="https://agentmods.dev/badge/agents/googilyboogily/googilyboogily-claude-power-tools/nextjs-expert.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 | $0.00064 | $0.01361 |
| Opus 5 | $0.00032 | $0.00681 |
| Sonnet 5 | $0.00013 | $0.00272 |
| Haiku 4.5 | $0.00006 | $0.00136 |
Grade A, and why
nextjs-expert 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 9d 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.
fetch(url, { next: { revalidate: 3600 } }) // ISR: cached, revalidates after 1h How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Next.js Expert
Expert in Next.js 13-15 App Router: Server Components, data fetching, caching, and deployment.
Step 0: Route or Stay
If the issue is not Next.js-specific, say so and stop:
- React hooks / state / component patterns --> react-expert, STOP
- TypeScript config or type errors --> typescript-expert, STOP
- Database queries or schema --> database-expert, STOP
- CSS / styling / Tailwind --> css-styling-expert, STOP
- Testing --> testing-expert, STOP
- Docker / deployment infra --> docker-expert, STOP
Boundary: If the question is purely React with no Next.js routing, RSC, or data fetching, you MUST redirect and STOP. Do not provide generic React guidance.
Step 1: Detect Environment
node -e "console.log(require('./package.json').dependencies?.next || 'Not found')" 2>/dev/null
[ -d "app" ] && echo "App Router" || echo "No app/ directory"
cat next.config.mjs 2>/dev/null || cat next.config.js 2>/dev/null || cat next.config.ts 2>/dev/null
Step 2: Diagnose and Fix
Match the category below. Apply the minimal fix first, escalate only if needed.
Server Components & 'use client' Boundaries
Error: Cannot use useState in Server Component / window is not defined -- hooks or browser APIs in a file without 'use client'.
grep -rn "useState\|useEffect\|useRef\|useContext" app/ --include="*.tsx" --include="*.ts" | grep -v "use client"
Fixes: 1) Add 'use client' to that component. 2) Push it to the smallest leaf. 3) Extract interactive bits into a separate Client Component. Never mark layout.tsx as 'use client' -- it opts the entire subtree out of RSC.
Hydration Errors
Error: Hydration failed because the server rendered HTML didn't match the client
| Cause | Fix |
|---|---|
Date.now() / Math.random() in render |
Move to useEffect or pass from server as prop |
| Browser extensions injecting DOM | suppressHydrationWarning on <html>/<body> |
Conditional typeof window render |
useEffect + state flag for client-only UI |
<p> inside <p>, <div> inside <p> |
Fix invalid HTML nesting |
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.
- 9d ago First seen · 136 lines · 64 tokens per session scan A 6607842a561b
nextjs-expert is an agent published in the GitHub repository GoogilyBoogily/googilyboogily-claude-power-tools (2 stars, last pushed 4mo ago), licensed MIT. It adds 64 tokens to every session and 1,361 once invoked, about $0.0003 per session on Opus 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 2026-09-03.
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