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 agentmods add instructions/vercel/microfrontends/agents-mdgit clone --depth 1 https://github.com/vercel/microfrontendsWhat 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 | $0.01094 | $0.01094 |
| Opus 5 | $0.00547 | $0.00547 |
| Sonnet 5 | $0.00219 | $0.00219 |
| Haiku 4.5 | $0.00109 | $0.00109 |
Grade A, and why
microfrontends AGENTS.md 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 yesterday.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- microfrontends CLAUDE.md — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
This is a monorepo for @vercel/microfrontends, a library that enables splitting large applications into independently developed and deployed microfrontends on Vercel. The package provides generic platform support for microfrontends in multiple frameworks, such as Next.js, SvelteKit, React Router, Vite, and React.
Repository Structure
packages/microfrontends/- The main@vercel/microfrontendspackage (the only publishable package)examples/- Working examples of microfrontend implementations (nextjs-app, nextjs-pages, react-router, single-spa, sveltekit, etc.)
Technologies
- This is a TypeScript codebase
- Use pnpm for package management
- Turbo manages the monorepo build pipeline
- The package uses dual ESM/CJS exports via tsup
- Follow Vercel style guide (configured via
@vercel/style-guide) - Be familiar with Module Federation, single-spa, and Next.js Multi-Zones
Common Commands
pnpm build- Build all packages using Turbopnpm test- Run unit tests for all packagespnpm lint- Run ESLint on all packagespnpm format- Format all files with Prettierpnpm typecheck- Run TypeScript type checkingpnpm checks- Run build, lint, test, and typecheck on all packages (run before submitting PRs)
When running commands for a specific application, do not cd into the directory. Run commands from the root. The above commands can be run for a particular package by using a filter option: pnpm checks -F <package name>. Use this.
Make sure that pnpm checks is successful for the entire repository when verifying a change.
Dev examples
pnpm dev:nextjs-app- Run the Next.js App Router examplepnpm dev:nextjs-pages- Run the Next.js Pages Router examplepnpm dev:react-router- Run the React Router examplepnpm dev:single-spa- Run the single-spa examplepnpm dev:sveltekit- Run the SvelteKit example
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.
- yesterday First seen · 96 lines · 1,094 tokens per session scan A 0948c91714e1
microfrontends AGENTS.md is an instructions file published in the GitHub repository vercel/microfrontends (45 stars, last pushed 1mo ago), licensed MIT. It adds 1,094 tokens to every session, about $0.0055 per session on Opus 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 2026-08-30.
Other instructions, from other repositories
ssgoi AGENTS.md
Instructions for meursyphus/ssgoi, covering ssgoi and releasing.
nextjs-template-mongodb AGENTS.md
Instructions for mongodb-developer/nextjs-template-mongodb, covering agents.md, build and test commands, project structure, environment variables and configuration and mongodb skills.
ssgoi CLAUDE.md
Instructions for meursyphus/ssgoi, a project described as: animated page transition for major ssr frameworks and browsers, including Safari.
qiankun AGENTS.md
Instructions for umijs/qiankun, covering qiankun project knowledge base, structure, architecture (big picture), commands and build (vite 8 → package javascript; tsc → declarations).
magicui AGENTS.md
Instructions for magicuidesign/magicui, covering project context, key principles, before writing code, rules and accessibility (a11y).
qiankun CLAUDE.md
Instructions for umijs/qiankun: This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.