What is core AGENTS.md?

Repository instructions for AI coding agents, including which commands, tools, package versions, and workflow rules to follow.

Use them when setting up the repository, running checks, working in Git worktrees, or choosing between Turbo, package scripts, and CI workflows.

They provide a local source of truth when documentation and automated checks differ, and help agents match the project’s development environment.

How module-federation/core configures Codex and OpenCode

About the project

Module Federation is a system for sharing code, resources, and dependencies between separate JavaScript applications, allowing a large application to be split into independently developed micro-frontends. It is used by web developers building applications from multiple cooperating front-end modules, with runtime loading, manifests, type hints, and plugins supporting that architecture.

module-federation/core · 2,677 stars · on GitHub · module-federation.io

Reuse

Borrowing it

Nothing to install: this file belongs to module-federation/core. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/module-federation/core/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/module-federation/core

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/module-federation/core/agents-md/github.svg)](https://agentmods.dev/instructions/module-federation/core/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/module-federation/core/agents-md"><img src="https://agentmods.dev/badge/instructions/module-federation/core/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/module-federation/core/agents-md"><img src="https://agentmods.dev/badge/instructions/module-federation/core/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,096 This file is loaded in full into every session.

When invoked 2,096 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.02096	$0.02096
Opus 5.5	$0.00838	$0.00838
Sonnet 5.5	$0.00419	$0.00419
Haiku 4.5	$0.00210	$0.00210

Measured 1mo ago against content hash ef33a366bcfa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

core 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 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.

AGENTS.md · 304 lines

How it starts

The opening of the file, as written. The whole thing — 304 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

How AI coding agents should operate in this repository.

Important migration note (Turborepo): Nx orchestration has been removed from this repository. Prefer Turbo + package scripts for all build/test/lint workflows.

Scope and Precedence

Scope: this file applies to the full repository root.
Precedence: a deeper AGENTS.md overrides this file for its subtree.
This is an agent-operations document, not a contributor tutorial.

Source of Truth (in priority order)

GitHub Actions workflows in .github/workflows/*.yml and .github/workflows/*.yaml
Local CI parity runner in tools/scripts/ci-local.mjs
Root scripts in package.json as wrappers/convenience entrypoints

If prose docs conflict with workflows (for example README.md or CONTRIBUTING.md), follow the workflow commands.

Environment Parity

Node.js: 24 (from .nvmrc and workflow setup)
pnpm: 10.28.0 (from package.json packageManager)
Package manager: pnpm only

Recommended setup for agents:

corepack enable
pnpm install --frozen-lockfile

Worktree safety rule:

In git worktree contexts, prefer running Turbo/package scripts directly (pnpm exec turbo ... / pnpm --filter ... run ...).

Worktree Mode (Required in Worktrees)

Use these rules whenever the checkout is a git worktree (typically git rev-parse --git-dir differs from git rev-parse --git-common-dir):

Setup/install via:

corepack enable
pnpm install --frozen-lockfile

Run workspace tasks via Turbo/package scripts:

pnpm exec turbo run <task>
pnpm --filter <package-name> run <script>

CI-Aligned Command Matrix

Use these as defaults unless the task explicitly requires something else.

Turbo Task Primer (How to Run Tasks)

List effective tasks:

pnpm exec turbo run build --dry=json

Run a task across the workspace:

pnpm exec turbo run <task>

Run a task for packages only:

pnpm exec turbo run <task> --filter=./packages/**

Read the full file on GitHub · 304 lines

Changes

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 · +6 lines · +62 tokens per session ef33a366bcfa
2mo ago First seen · 298 lines · 2,034 tokens per session scan A ebf60337dd44

Subscribe to this mod's changes

core AGENTS.md is an instructions file published in the GitHub repository module-federation/core (2,677 stars, last pushed today), licensed MIT. It adds 2,096 tokens to every session, about $0.0084 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 2026-08-31.

Git and workflow React TypeScript module-federation nextjs node webpack

core AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
core AGENTS.mdmodule-federation/core	Instructions file	2.7k	today	MIT	A	2,096	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

core: Instructions file for Codex