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 S3YED/appie-kit --skill nextjs-agent-firstgit clone --depth 1 https://github.com/S3YED/appie-kitWrote 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/s3yed/appie-kit/nextjs-agent-first)<a href="https://agentmods.dev/skills/s3yed/appie-kit/nextjs-agent-first"><img src="https://agentmods.dev/badge/skills/s3yed/appie-kit/nextjs-agent-first/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/s3yed/appie-kit/nextjs-agent-first"><img src="https://agentmods.dev/badge/skills/s3yed/appie-kit/nextjs-agent-first.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 | $0.00044 | $0.00683 |
| Opus 5.5 | $0.00018 | $0.00273 |
| Sonnet 5.5 | $0.00009 | $0.00137 |
| Haiku 4.5 | $0.00004 | $0.00068 |
Grade A, and why
nextjs-agent-first 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.
How it starts
The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Next.js Agent-First Features
Next.js 16.3+ is the first framework designed explicitly for AI-agent-driven development.
Key Features
AGENTS.md (auto-generated docs)
next devauto-writes version-matched docs pointers intoAGENTS.md- Agents read actual docs instead of guessing from training data
- Opt-out via
agentRules: falseinnext.config.ts
First-Party Skills (npx-installable)
Install via npx skills add vercel/next.js:
| Skill | Purpose |
|---|---|
next-dev-loop |
Full dev feedback loop: drive browser, read console, inspect React tree, follow network requests |
next-cache-components-adoption |
Incremental or direct adoption of Cache Components ("use cache") |
next-cache-components-optimizer |
Optimize routes for instant navigation by growing the static shell |
Agent Browser React Introspection
agent-browser v0.27+ can run React DevTools commands from CLI:
# Launch with React DevTools
agent-browser --enable react-devtools
# Inspect component tree
agent-browser react tree
agent-browser react inspect <fiber-id>
agent-browser react renders start
agent-browser react suspense --only-dynamic --json
Actionable Errors (Instant Insights)
Error overlay shows labeled fixes (Stream / Cache / Block) with a "Copy prompt" button that copies a paste-ready agent prompt.
Streamlined MCP Server
Two new tools: get_compilation_issues and compile_route — check compilation without full next build.
Turbopack Improvements (16.3)
- ~90% less memory (21.5GB → 2GB for vercel.com)
- ~2.3x faster cached builds
- Experimental Rust React Compiler (20-50% faster)
import.meta.globAPI support- ~15% faster dev cold start
Usage
When building or debugging Next.js projects with an AI agent:
- Enable AGENTS.md: Ensure
next devruns in the project so docs are auto-generated - Use next-dev-loop skill: Load it when you need browser-based verification
- Run agent-browser with React:
agent-browser --enable react-devtoolsfor component inspection - Copy actionable error prompts: Use the error overlay's "Copy prompt" button for instant fixes
- Cache Components optimizer: Run after building to optimize routes for instant nav
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 First seen · 69 lines · 44 tokens per session scan A 04715a223b38
nextjs-agent-first is a skill published in the GitHub repository S3YED/appie-kit (12 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 683 once invoked, about $0.0002 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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