Borrowing it
Nothing to install: this file belongs to mgiovani/cc-arsenal. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mgiovani/cc-arsenal/main/CLAUDE.mdgit clone --depth 1 https://github.com/mgiovani/cc-arsenalWrote 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.
[](https://agentmods.dev/instructions/mgiovani/cc-arsenal/claude-md)<a href="https://agentmods.dev/instructions/mgiovani/cc-arsenal/claude-md"><img src="https://agentmods.dev/badge/instructions/mgiovani/cc-arsenal/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.
<a href="https://agentmods.dev/instructions/mgiovani/cc-arsenal/claude-md"><img src="https://agentmods.dev/badge/instructions/mgiovani/cc-arsenal/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01177 | $0.01177 |
| Opus 5.5 | $0.00471 | $0.00471 |
| Sonnet 5.5 | $0.00235 | $0.00235 |
| Haiku 4.5 | $0.00118 | $0.00118 |
Grade D, and why
cc-arsenal CLAUDE.md scanned grade D with 2 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
`make configure` never modifies `~/.claude/settings.json`: it only symlinks the files you select. Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf ~/.claude/plugins/cache/cc-arsenal-marketplace/ 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.
@AGENTS.md
This file adds Claude-Code-only guidance on top of the tool-agnostic AGENTS.md above (Claude Code doesn't read AGENTS.md natively, so this import is the bridge). Everything else (repo overview, skill catalog, skill anatomy, evals, Makefile commands, contributing) lives in AGENTS.md; don't duplicate it here.
Plugin System (Recommended for Claude Code)
Register this repository as a Claude Code Plugin marketplace:
/plugin marketplace add mgiovani/cc-arsenal
Then, to install a specific plugin set:
- Select Browse and install plugins
- Select cc-arsenal-marketplace
- Select one of the variants (see the table below)
- Select Install now
Alternatively, directly install via:
/plugin install cc-arsenal@cc-arsenal-marketplace
For local development, add a local marketplace instead:
/plugin marketplace add /path/to/cc-arsenal
Benefits over npx skills add: managed installation, automatic updates, easy enable/disable, no system-wide symlinks, plus the extras below (subagent orchestration, hooks, plugin variants) that only work inside Claude Code.
Plugin variants: install the whole toolkit or a focused subset:
| Plugin | Use Case |
|---|---|
cc-arsenal |
Complete toolkit: every skill |
cc-arsenal-dev |
Development workflows |
cc-arsenal-product |
Product specs: PRD, design spec, and design tokens |
cc-arsenal-review |
Code review and quality audits |
cc-arsenal-docs |
Documentation generation |
cc-arsenal-git |
Git/GitHub workflow automation |
cc-arsenal-jira |
Jira CLI |
cc-arsenal-skills |
Specialty model-invoked capabilities |
Each variant's exact skill set is defined in .claude-plugin/marketplace.json, the single source of truth, so the list never drifts across docs. The cc-arsenal variant intentionally omits the skills field there: an unset skills means "auto-load every skill in the repo," so it never needs syncing with the others.
Troubleshooting plugin updates:
Local directory marketplaces ("source": "directory") do NOT support auto-update or version detection: Claude Code caches marketplace.json on first install and local file changes don't invalidate that cache. After creating new skills or bumping versions:
rm -rf ~/.claude/plugins/cache/cc-arsenal-marketplace/
# Then in Claude Code: /plugin → Update now
Use a GitHub remote marketplace instead for automatic updates in production.
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.
- 1mo ago Changed · -1 lines · -23 tokens per session fdeb5228c25d
- 1mo ago First seen · 113 lines · 1,200 tokens per session scan D 5d575cf2222b
cc-arsenal CLAUDE.md is an instructions file published in the GitHub repository mgiovani/cc-arsenal (8 stars, last pushed yesterday), licensed MIT. It adds 1,177 tokens to every session, about $0.0047 per session on Opus 5.5. A static security scan graded it D with 2 findings (reads agent configuration directories, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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).
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.
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).
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.
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.