What is rails-claude-code CLAUDE.md?

Project instructions for building and checking Claude Code plugins in a documentation-only marketplace. They describe plugin folders, metadata files, agents, skills, and supporting resources.

Use them when adding or changing plugins in this marketplace. They help decide whether a capability belongs in an agent file or a skill bundle and how to validate it before committing.

They give contributors the expected file layout and a validation command, even though the repository has no normal test suite or build system.

How maquina-app/rails-claude-code configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to maquina-app/rails-claude-code. 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/maquina-app/rails-claude-code/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/maquina-app/rails-claude-code

Made for: Claude Code.

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/maquina-app/rails-claude-code/claude-md.svg)](https://agentmods.dev/instructions/maquina-app/rails-claude-code/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/maquina-app/rails-claude-code/claude-md"><img src="https://agentmods.dev/badge/instructions/maquina-app/rails-claude-code/claude-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 726 This file is loaded in full into every session.

When invoked 726 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	$0.00726	$0.00726
Opus 5	$0.00363	$0.00363
Sonnet 5	$0.00145	$0.00145
Haiku 4.5	$0.00073	$0.00073

Measured 7d ago against content hash 7c3bb70109cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

rails-claude-code CLAUDE.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 7d 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.

CLAUDE.md · 39 lines

How it starts

The opening of the file, as written. The whole thing — 39 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Documentation-only plugin marketplace — no build system, test suite, linter, or CI. All content is Markdown, JSON, and YAML.

Plugin structure

.claude-plugin/marketplace.json          ← Lists all plugins
<plugin-name>/.claude-plugin/plugin.json ← Plugin metadata
<plugin-name>/agents/<plugin-name>.md    ← Capability as a single-file agent (most plugins)
<plugin-name>/skills/<name>/SKILL.md     ← Capability as a skill bundle (+ scripts/) — e.g. rails-hotwire-driver

Supporting files go in references/, workflows/, examples/, templates/ within each plugin directory; a skill's helper scripts go in skills/<name>/scripts/ (keep .sh files executable — git ls-files -s should show mode 100755).

A capability can ship as either a single-file agents/*.md (the common convention here) or a skills/<name>/SKILL.md bundle. Both are valid.

Critical rules

Validate before committing

This repo has no traditional test suite, but claude plugin validate <plugin-dir> (and claude plugin validate . for the marketplace) IS the check — run it after any manifest/frontmatter change. Add --strict to catch unrecognized fields, missing metadata, and version mismatches. Bump a plugin's version whenever its content changes, or installed users won't receive the update (an unset version falls back to the git SHA).

Version sync

Versions must match in THREE places — update all or you'll create drift:

.claude-plugin/marketplace.json → version field for the plugin
<plugin-name>/.claude-plugin/plugin.json → version field
The root README.md Plugins table version column (and confirm the install/enabledPlugins blocks list the plugin)

Install commands

The marketplace name is maquina, so install commands use the @maquina suffix (/plugin install <plugin>@maquina) — NOT @rails. The marketplace is added with the GitHub owner/repo: /plugin marketplace add maquina-app/rails-claude-code (owner is maquina-app, matching the git remote — not maquina). Keep these consistent across the root README and any per-plugin docs.

Read the full file on GitHub · 39 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.

7d ago First seen · 39 lines · 726 tokens per session scan A 7c3bb70109cc

Subscribe to this mod's changes

rails-claude-code CLAUDE.md is an instructions file published in the GitHub repository maquina-app/rails-claude-code (47 stars, last pushed 21d ago), licensed MIT. It adds 726 tokens to every session, about $0.0036 per session on Opus 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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rails-claude-code: Instructions file for Claude Code