react-router: Skill for Claude Code

.agents/skills/react-router/SKILL.md

react-router is a skill for Claude Code, Codex from remix-run/react-router. It costs 63 tokens per session (1,180 once invoked), scanned A, original, MIT.

Development guidance for React Router applications across its Framework, Data, Declarative, and experimental server-component modes. React Router is a library for connecting URLs to application screens and data-loading behavior.

In plain words
What is it for?
Configuring routes, loaders, forms, navigation, server rendering, pre-rendering, middleware, URL parameters, and React Router upgrades.
Why use it?
The correct setup and APIs depend on which mode and package version the application uses. The guidance helps prevent mixing patterns from different modes or versions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is remix-run/react-router's own configuration. It tells Claude Code and Codex how to work on react-router itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything react-router configures →

not rated 57krepo +13 today A scan Socket: passSnyk: passSkillSpector: warn 63 tokens original MIT
About the project

React Router is a routing system for React applications that maps URLs to the interface shown on screen. Developers use it either as a small library within their own application structure or as part of a full React framework.

remix-run/react-router · 56,622 stars · on GitHub · reactrouter.com

Reuse

Borrowing it

Nothing to install: this file belongs to remix-run/react-router. 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/remix-run/react-router/main/.agents/skills/react-router/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/remix-run/react-router

Made for: Claude Code, Codex.

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.

agentmods badge for react-router

README.md
[![agentmods](https://agentmods.dev/badge/skills/remix-run/react-router/react-router/github.svg)](https://agentmods.dev/skills/remix-run/react-router/react-router)
Your own site
<a href="https://agentmods.dev/skills/remix-run/react-router/react-router"><img src="https://agentmods.dev/badge/skills/remix-run/react-router/react-router/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.

agentmods 80×15 button for react-router

Your own site · 80×15
<a href="https://agentmods.dev/skills/remix-run/react-router/react-router"><img src="https://agentmods.dev/badge/skills/remix-run/react-router/react-router.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,180 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 18 Jun 2026
  • Snyk pass 18 Jun 2026
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 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 Prompt Injection · line 117
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 122
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00063 $0.01180
Opus 5.5 $0.00025 $0.00472
Sonnet 5.5 $0.00013 $0.00236
Haiku 4.5 $0.00006 $0.00118

Measured 1mo ago against content hash a9b77003a8fc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

react-router 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.agents/skills/react-router/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

React Router

React Router is mode-specific. Before changing an app, identify the mode, load the matching reference, then read the installed docs for the installed package version.

Identify the Mode

Do not apply Framework/Data patterns to a Declarative app unless you are intentionally migrating modes.

Framework Mode

Use Framework Mode guidance when you see:

  • @react-router/dev in dependencies
  • react-router.config.ts
  • app/routes.ts
  • app/entry.server.tsx and/or app/entry.client.tsx files
  • route modules under app/routes/
  • route exports like loader, action, clientLoader, clientAction, ErrorBoundary, meta, links, or headers
  • imports from ./+types/...
  • the React Router Vite plugin from @react-router/dev/vite

Framework examples usually use the default app/ directory, but check react-router.config.ts for a custom appDirectory before assuming exact paths.

Then read references/framework-mode.md.

Data Mode

Use Data Mode guidance when you see:

  • createBrowserRouter, createHashRouter, createMemoryRouter, or createStaticRouter
  • <RouterProvider router={router}>
  • route objects with properties like path, children, loader, action, Component, ErrorBoundary, or lazy
  • data APIs without the Framework Vite plugin

Then read references/data-mode.md.

Declarative Mode

Use Declarative Mode guidance when you see:

  • <BrowserRouter>, <HashRouter>, or <MemoryRouter>
  • <Routes> and <Route> JSX route configuration
  • route components passed with element={<Component />}
  • no data router, no route module convention, and no loaders/actions

Then read references/declarative-mode.md.

RSC Framework and RSC Data Modes

React Server Components support is unstable and exists in both Framework and Data variants. Use RSC guidance when you see:

  • unstable_reactRouterRSC
  • @vitejs/plugin-rsc
  • unstable_RSCRouteConfig
  • RSC entry files such as entry.rsc
  • ServerComponent, ServerErrorBoundary, ServerLayout, or ServerHydrateFallback
  • React directives or boundary packages such as "use client", "server-only", or "client-only"

Read the full file on GitHub · 123 lines

Files

What ships with it

4 files 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.

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.

  1. 1mo ago First seen · 123 lines · 63 tokens per session scan A a9b77003a8fc

Subscribe to this mod's changes

react-router is a skill published in the GitHub repository remix-run/react-router (56,622 stars, last pushed today), licensed MIT. It adds 63 tokens to every session and 1,180 once invoked, about $0.0003 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.

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