What is inertia-coder?

A development guide for building single-page applications with Rails and Inertia.js, using React, Vue, or Svelte for the browser interface. Inertia connects the browser pages to Rails without requiring a separate API for every page.

Use it when setting up Inertia.js or creating Rails pages with React, Vue, or Svelte.

It gives a consistent way to handle forms, shared data, page changes, and client-side navigation in a Rails SPA.

inertia-coder — Skill for Claude Code by majesticlabs-dev

Install

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.

Any agent

npx skills add majesticlabs-dev/majestic-marketplace --skill inertia-coder

Clone the repo

git clone --depth 1 https://github.com/majesticlabs-dev/majestic-marketplace

Made for: Claude Code.

Or install majestic-rails, the plugin that ships this one along with the rest of its 47 skills.

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/skills/majesticlabs-dev/majestic-marketplace/inertia-coder/github.svg)](https://agentmods.dev/skills/majesticlabs-dev/majestic-marketplace/inertia-coder)

Your own site

<a href="https://agentmods.dev/skills/majesticlabs-dev/majestic-marketplace/inertia-coder"><img src="https://agentmods.dev/badge/skills/majesticlabs-dev/majestic-marketplace/inertia-coder/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/skills/majesticlabs-dev/majestic-marketplace/inertia-coder"><img src="https://agentmods.dev/badge/skills/majesticlabs-dev/majestic-marketplace/inertia-coder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,256 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.

Origin unknown 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	$0.00067	$0.01256
Opus 5.5	$0.00027	$0.00502
Sonnet 5.5	$0.00013	$0.00251
Haiku 4.5	$0.00007	$0.00126

Measured 2mo ago against content hash cf94cb484a91, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

inertia-coder 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 2mo 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.

plugins/majestic-rails/skills/inertia-coder/SKILL.md · 213 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

3 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.

2mo ago First seen · 213 lines · 67 tokens per session scan A cf94cb484a91

Subscribe to this mod's changes

inertia-coder is a skill published in the GitHub repository majesticlabs-dev/majestic-marketplace (50 stars, last pushed 1mo ago), with no licence file. It adds 67 tokens to every session and 1,256 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 2026-09-03.

Backend and APIs Frontend React Vue and Svelte

inertia-coder next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
inertia-codermajesticlabs-dev/majestic-marketplace	Skill	50	1mo ago	none	A	67	Claude Code
vibe-codingdtyq/magic	Skill	5.1k	13d ago	none	A	178	Claude Code, Codex
framework-expertnguyenthienthanh/aura-frog	Skill	25	15d ago	MIT	A	48	Claude Code
nifra-webnifrajs/nifra	Skill	6	today	MIT	A	85	Claude Code
inertia-rails-setupinertia-rails/skills	Skill	70	2mo ago	MIT	A	98	Claude Code
graphql-clientalivirgo/Major-AI-Skills	Skill	2	yesterday	MIT	A	23	Claude Code
alova-client-usagealovajs/skills	Skill	5	3mo ago	MIT	A	135	Claude Code, Codex