What is react-horizontal-scrolling-menu AGENTS.md?

Contributor instructions for a React library that creates horizontally scrolling menus and tracks which items are visible.

Use it when changing the scrolling library, its examples or Storybook stories, the documentation website, end-to-end tests, or published agent skills.

They explain the repository layout, package and website workspaces, examples, tests, and the difference between contributor guidance and user skills.

How asmyshlyaev177/react-horizontal-scrolling-menu configures Codex an

Reuse

Borrowing it

Nothing to install: this file belongs to asmyshlyaev177/react-horizontal-scrolling-menu. 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/asmyshlyaev177/react-horizontal-scrolling-menu/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/asmyshlyaev177/react-horizontal-scrolling-menu

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/asmyshlyaev177/react-horizontal-scrolling-menu/agents-md/github.svg)](https://agentmods.dev/instructions/asmyshlyaev177/react-horizontal-scrolling-menu/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/asmyshlyaev177/react-horizontal-scrolling-menu/agents-md"><img src="https://agentmods.dev/badge/instructions/asmyshlyaev177/react-horizontal-scrolling-menu/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/asmyshlyaev177/react-horizontal-scrolling-menu/agents-md"><img src="https://agentmods.dev/badge/instructions/asmyshlyaev177/react-horizontal-scrolling-menu/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 4,142 This file is loaded in full into every session.

When invoked 4,142 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	$0.04142	$0.04142
Opus 5.5	$0.01657	$0.01657
Sonnet 5.5	$0.00828	$0.00828
Haiku 4.5	$0.00414	$0.00414

Measured 13d ago against content hash 8223c0081584, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

react-horizontal-scrolling-menu 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 13d 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 · 296 lines

How it starts

The opening of the file, as written. The whole thing — 296 lines — stays where its author put it; the contents beside it link to each section on GitHub.

A horizontal scrolling menu for React, built on native browser scrolling with per-item visibility tracking (IntersectionObserver). Published to npm; ~347k downloads/month; one stable public API across React 16.8–19.

If you are here to use the library rather than change it, read skills/ instead — those files are written for you, and are more specific than this one. npx @tanstack/intent@latest install wires them into your agent; skills/menu-setup/SKILL.md is the entry point.

Layout

src/                  # the library
stories/              # Storybook stories; *.source.tsx files are the
                      #   canonical examples, rendered on the website and
                      #   mirrored to /examples/<slug>.md
skills/               # AI agent skills, published with the package
                      #   (package.json `files`), one dir per SKILL.md
website/              # the landing + docs site: TanStack Start, SSR,
                      #   prerendered onto Cloudflare Workers. A workspace
                      #   member, with two Playwright suites: website/e2e
                      #   (HTTP-level smoke) and website/tests (a11y)
e2e/                  # Playwright, against the built library
types/                # public type surface

Commands

pnpm test             # unit + lint + e2e (wireit orchestrates)
pnpm test:unit
pnpm test:e2e
pnpm build            # rollup build of the library
pnpm storybook        # the examples, live

# website/ is its own workspace
cd website && pnpm dev        # vite dev
cd website && pnpm build      # build + prerender every route
cd website && pnpm typecheck
cd website && pnpm test       # build, then the smoke suite (website/e2e)
cd website && pnpm test:a11y  # build, then axe + rendered contrast (website/tests)
cd website && pnpm preview    # build, then serve the Worker locally
cd website && pnpm deploy     # wrangler deploy

Package management

Read the full file on GitHub · 296 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.

13d ago Changed · -5 lines · -114 tokens per session 8223c0081584
2mo ago Changed · +9 lines · +147 tokens per session c7ed5e1463a1
2mo ago First seen · 292 lines · 4,109 tokens per session scan A c8a25c880615

Subscribe to this mod's changes

react-horizontal-scrolling-menu AGENTS.md is an instructions file published in the GitHub repository asmyshlyaev177/react-horizontal-scrolling-menu (788 stars, last pushed 5d ago), licensed MIT. It adds 4,142 tokens to every session, about $0.0166 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 2026-08-30.

Frontend React javascript navigation react-component reactjs scroll

react-horizontal-scrolling-menu AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
react-horizontal-scrolling-menu AGENTS.mdasmyshlyaev177/react-horizontal-scrolling-menu	Instructions file	788	5d ago	MIT	A	4,142	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	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	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

react-horizontal-scrolling-menu: Instructions file for Codex