# inertia-rails-pages

A skill for building Inertia Rails pages: persistent layouts, Link and router navigation, URL-driven state, deferred sections and infinite scroll.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 504 installs · ★ 70
- Author: inertia-rails
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/inertia-rails/skills/tree/HEAD/skills/inertia-rails-pages/SKILL.md
- Updated: 2026-09-01
- HTML: https://affpapa.org/en/nevibecode/skills/inertia-rails-pages

## What it does

The skill covers how pages work in Inertia Rails: page components, persistent layouts, navigation, URL-driven state and the client-side router APIs. React examples sit inline; Vue and Svelte equivalents live in the reference files.

What you get is a set of rules with code snippets. Layouts are attached with `Page.layout = ...` rather than a JSX wrapper, because wrapping remounts the component on every navigation and drops scroll position and state. Dialog, tab and filter state comes from the controller as a prop and changes through `router.get` with query params. Use `router.reload({ only: [...] })` to refresh data without navigating, and `router.replaceProp` to update a prop without a server round-trip.

The skill also lists what to avoid: parsing `window.location.search`, syncing URL and state with `useState` plus `useEffect`, passing arguments to a `<Deferred>` render function. Flash sits at the top level of the page, not inside props. Worth installing if you already build on Inertia Rails and keep forgetting these details.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add inertia-rails/skills --skill inertia-rails-pages -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/inertia-rails-pages/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/inertia-rails-pages/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add inertia-rails/skills --skill inertia-rails-pages -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/inertia-rails-pages/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add inertia-rails/skills --skill inertia-rails-pages -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/inertia-rails-pages/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install inertia-rails/skills inertia-rails-pages
```

2. **Manually: put the files in place**
- File: `.github/skills/inertia-rails-pages/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add inertia-rails/skills --skill inertia-rails-pages -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/inertia-rails/skills --path skills/inertia-rails-pages
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/inertia-rails-pages/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add inertia-rails/skills --skill inertia-rails-pages -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/inertia-rails/skills/tree/HEAD/skills/inertia-rails-pages/SKILL.md

## When to use it
- keep a layout mounted across navigations
- move dialog or tab state into the URL
- refresh a subset of props without a full reload
- add infinite scroll and lazy-loaded sections
- prefetch page data on link hover

## Example prompts
- Build a users index page with a persistent layout via `Page.layout`
- Open a dialog through `router.get` with `user_id` in the query and read state from the prop
- Refresh only the `users` prop with `router.reload({ only: ['users'] })`

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 074e3ad72d748f00.

BEGIN THIRD-PARTY FILE 074e3ad72d748f00
````text
---
name: inertia-rails-pages
description: >-
  Page components, persistent layouts, Link/router navigation, Head, Deferred, WhenVisible, InfiniteScroll,
  and URL-driven state for Inertia Rails. React examples inline; Vue and Svelte equivalents in references.
  Use when building pages, adding navigation, implementing persistent layouts, infinite scroll, lazy-loaded
  sections, or working with client-side Inertia APIs (router.reload, router.replaceProp, prefetching).
---

# Inertia Rails Pages

Page components, layouts, navigation, and client-side APIs.

**Before building a page, ask:**
- **Does this page need a layout?** → Use persistent layout (React: `Page.layout = ...`; Vue: `defineOptions({ layout })`; Svelte: module script export) — wrapping in JSX/template remounts on every navigation, losing scroll position, audio playback, and component state
- **Does UI state come from the URL?** → Change BOTH controller (read `params`, pass as prop) AND component (derive from prop, no `useState`/`useEffect`) — use `router.get` to update URL
- **Need to refresh data without navigation?** → `router.reload({ only: [...] })` — never `useEffect` + `fetch`
- **Need to update a prop without server round-trip?** → `router.replaceProp` — no fetch, no reload

**NEVER:**
- Parse `window.location.search` or use `useSearchParams` — derive URL state from controller props
- Use `useState`/`useEffect` to sync URL ↔ React state — the controller passes URL-derived data as props; the component just reads them
- Pass arguments to `<Deferred>` render function — `{(data) => ...}` does NOT work; child reads via `usePage()`
- Access `usePage().props.flash` — flash is top-level: `usePage().flash`
- Wrap layout in JSX return for persistence — use `Page.layout = ...` or global layout inside createInertiaApp's resolve callback

## Page Component Structure

Pages are default exports receiving controller props as function arguments.
Use `type Props = { ... }` (not `interface` — causes TS2344 in React). Vue uses `defineProps<T>()`, Svelte uses `let { ... } = $props()`.

```tsx
type Props = {
  posts: Post[]
}

export default function Index({ posts }: Props) {
  return <PostList posts={posts} />
}
```

## Persistent Layouts

Layouts persist across navigations — no remounting, preserving scroll, audio, etc.

```tsx
import { AppLayout } from '@/layouts/app-layout'

export default function Show({ course }: Props) {
  return <CourseContent course={course} />
}

// Single layout
Show.layout = (page: React.ReactNode) => <AppLayout>{page}</AppLayout>
```

Default layout in entrypoint:
```tsx
````
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First 2625 of 12074 bytes. © inertia-rails · MIT · https://github.com/inertia-rails/skills/tree/HEAD/skills/inertia-rails-pages/SKILL.md

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