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 irahardianto/awesome-agv --skill nextjs-idiomsgit clone --depth 1 https://github.com/irahardianto/awesome-agvWrote 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/irahardianto/awesome-agv/nextjs-idioms)<a href="https://agentmods.dev/skills/irahardianto/awesome-agv/nextjs-idioms"><img src="https://agentmods.dev/badge/skills/irahardianto/awesome-agv/nextjs-idioms/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/irahardianto/awesome-agv/nextjs-idioms"><img src="https://agentmods.dev/badge/skills/irahardianto/awesome-agv/nextjs-idioms.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 11 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 20 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 22 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 34 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 426 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 20 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 31 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 427 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium MCP Rug Pull · line 418 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 419 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 420 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium Agent Snooping · line 428 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00055 | $0.04248 |
| Opus 5.5 | $0.00022 | $0.01699 |
| Sonnet 5.5 | $0.00011 | $0.00850 |
| Haiku 4.5 | $0.00006 | $0.00425 |
Grade A, and why
nextjs-idioms 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 29d 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.
await fetch(url, { cache: 'force-cache' }); // Cached indefinitely How it starts
The opening of the file, as written. The whole thing — 427 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Next.js Idioms and Patterns
Next.js (15+) rewards App Router, Server Components, and Server Actions. Idiomatic Next.js = server-first, streaming, edge-ready. Push logic to the server, keep the client thin.
Scope: Next.js-specific patterns only. For React:
@.agents/skills/react-idioms/SKILL.md. For TypeScript:@.agents/skills/typescript-idioms/SKILL.md. For project layout:references/project-structure.md.Loading guard: This skill assumes the Next.js App Router (Next.js 15+,
app/directory). For Pages Router (pages/) legacy code, most React idioms still apply but App-Router-specific sections (RSC, Server Actions, parallel/intercepting routes,'use cache') do not. Co-load@.agents/skills/react-idioms/SKILL.mdfor client-component patterns.
When to Load References
Load these before writing code in the matching context — not after.
| Situation | Reference to Load |
|---|---|
| Starting a Next.js project or reviewing file layout | references/project-structure.md |
| TypeScript type system, async, Zod, error types | @.agents/skills/typescript-idioms/SKILL.md (always co-load) |
| Zod schemas / boundary validation (API routes, Server Actions, env) | @.agents/skills/typescript-idioms/references/zod-patterns.md |
| Async / I/O / coercion / security pitfalls | @.agents/skills/typescript-idioms/references/ts-patterns-and-anti-patterns.md |
| Client-component hooks/state/forms (non-App-Router) | @.agents/skills/react-idioms/SKILL.md |
Server vs Client Component Decision Tree
- Keep Server Component (default) when: fetching data, accessing DB/secrets, using heavy deps, or rendering static/cacheable content.
- Add
'use client'only when: using hooks (useState,useEffect), attaching event handlers, calling browser APIs (window,localStorage), or wrapping third-party client libs. - Composition pattern — server parent fetches, client child handles interactivity:
// app/tasks/page.tsx (Server) export default async function TasksPage() { const tasks = await getTasks(); return <TaskBoard tasks={tasks} />; // Client component for drag-and-drop } // features/task/components/task-board.tsx ('use client') export function TaskBoard({ tasks }: { tasks: Task[] }) { const [sorted, setSorted] = useState(tasks); return <DndContext>...</DndContext>; } - Push
'use client'as deep as possible — never mark an entire page as client:// ❌ 'use client' at page level loses all server benefits // ✅ Only wrap the interactive leaf: export default async function TasksPage() { const tasks = await getTasks(); return ( <> <TaskStats count={tasks.length} /> {/* Server */} <TaskFilterBar /> {/* Client — has state */} </> ); }
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 29d ago Changed · -9 lines · +18 tokens per session 6db7346c2358
- 1mo ago First seen · 436 lines · 37 tokens per session scan A 60ee52fa018b
nextjs-idioms is a skill published in the GitHub repository irahardianto/awesome-agv (156 stars, last pushed 13d ago), licensed MIT. It adds 55 tokens to every session and 4,248 once invoked, about $0.0002 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.
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