agentmods.dev

claude-code_dual-boot-skill: Instructions file for Claude Code

CLAUDE.md

claude-code_dual-boot-skill CLAUDE.md is an instructions file for Claude Code from ombulabs/claude-code_dual-boot-skill. It costs 1,333 tokens per session, scanned A, original, MIT.

Project instructions for a Claude Code skill that manages dual-boot Ruby and Rails environments using the next_rails gem. They describe the skill's files, scope, workflows, and supporting references.

In plain words
What is it for?
Use them when authoring, updating, or documenting the dual-boot skill and its setup and cleanup workflows.
Why use it?
They keep work focused on maintaining the skill itself rather than accidentally performing a Rails upgrade in another application.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions .claude-plugin; mentions CLAUDE.md; mentions Claude Code.

This is ombulabs/claude-code_dual-boot-skill's own configuration. It tells Claude Code how to work on claude-code_dual-boot-skill 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 claude-code_dual-boot-skill configures →

not rated 15repo +1 3mo ago A scan 1,333 tokens original MIT
View source ↗ ombulabs/claude-code_dual-boot-skill fastruby.io
Reuse

Borrowing it

Nothing to install: this file belongs to ombulabs/claude-code_dual-boot-skill. 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/ombulabs/claude-code_dual-boot-skill/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/ombulabs/claude-code_dual-boot-skill

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.

agentmods badge for claude-code_dual-boot-skill CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/ombulabs/claude-code_dual-boot-skill/claude-md/github.svg)](https://agentmods.dev/instructions/ombulabs/claude-code_dual-boot-skill/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/ombulabs/claude-code_dual-boot-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/ombulabs/claude-code_dual-boot-skill/claude-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.

agentmods 80×15 button for claude-code_dual-boot-skill CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/ombulabs/claude-code_dual-boot-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/ombulabs/claude-code_dual-boot-skill/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,333 This file is loaded in full into every session.
When invoked 1,333 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01333 $0.01333
Opus 5.5 $0.00533 $0.00533
Sonnet 5.5 $0.00267 $0.00267
Haiku 4.5 $0.00133 $0.00133

Measured 1mo ago against content hash faf99043d0ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

claude-code_dual-boot-skill 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 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.

CLAUDE.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file guides Claude Code when working in this repository. This repo is the source for the dual-boot Claude Code skill — a plugin that helps end users set up and manage dual-boot Ruby/Rails environments with the next_rails gem.

When Claude is invoked here, the task is almost always to author, maintain, or enhance the skill itself — not to perform a Rails upgrade on some host app.

What this repository is

A packaged Claude Code skill distributed as a plugin. The skill's authoring surface lives in dual-boot/:

  • dual-boot/SKILL.md — skill entry point and trigger patterns (authoritative)
  • dual-boot/workflows/ — step-by-step procedures (setup-workflow.md, cleanup-workflow.md)
  • dual-boot/references/ — supporting docs (code patterns, CI, Gemfile examples, deprecation tracking)
  • dual-boot/examples/ — worked examples
  • dual-boot/CHANGELOG.md — version history

Top-level files:

  • .claude-plugin/plugin.json — plugin manifest
  • README.md — user-facing install + usage
  • LICENSE

Scope: stay inside the dual-boot boundary

This skill is part of a three-skill FastRuby.io toolkit. Each skill owns a distinct concern, and this repo must not grow guidance that belongs to the siblings.

In scope for this skill:

  • Installing/configuring the next_rails gem
  • Gemfile conventions for two dependency sets (Rails, Ruby, or any core gem)
  • NextRails.next? / NextRails.current? branching patterns in application code
  • CI wiring for both dependency sets (GitHub Actions, CircleCI, Jenkins)
  • Gemfile.next / Gemfile.next.lock lifecycle
  • Cleanup after the upgrade lands
  • Deprecation-warning visibility (because silenced warnings make dual-boot useless)

Out of scope — belongs to sibling skills, do NOT add here:

  • Rails version-specific breaking changes, deprecations, or migration steps → rails-upgrade
  • app:update guidance, per-version upgrade reports, detection scripts → rails-upgrade
  • Walking config.load_defaults forward, new_framework_defaults_*.rb handling, per-config risk tiers, initializer consolidation → rails-load-defaults
  • Gem compatibility resolution, monkeypatch debugging, time estimates, LTS upgrades

Read the full file on GitHub · 112 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.

  1. 1mo ago First seen · 112 lines · 1,333 tokens per session scan A faf99043d0ae

Subscribe to this mod's changes

claude-code_dual-boot-skill CLAUDE.md is an instructions file published in the GitHub repository ombulabs/claude-code_dual-boot-skill (15 stars, last pushed 3mo ago), licensed MIT. It adds 1,333 tokens to every session, about $0.0053 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.

Claude Codeclaude-aiclaude-skillsrailsruby-on-rails
Related

Other instructions, from other repositories

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,581 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,731 tokens

deno copilot-instructions.md

Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.

denoland/deno · 3,077 tokens