claude-code-extensions: Instructions file for Claude Code

CLAUDE.md

claude-code-extensions CLAUDE.md is an instructions file for Claude Code from nodnarbnitram/claude-code-extensions. It costs 4,246 tokens per session, scanned B, original, MIT.

Project instructions for a repository that creates Claude Code extensions such as agents, hooks, commands, skills, and output styles. They describe the repository's purpose and the required tools and structure for creating extensions.

In plain words
What is it for?
Use them when creating or managing Claude Code extensions, including agents, hooks, commands, skills, and output styles, or when planning significant repository changes.
Why use it?
They help an agent follow the project's extension templates and know when a change needs an OpenSpec proposal or the latest project guidance.

Instructions file for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT variable. Also seen: reads .claude/ paths; mentions .claude-plugin; mentions CLAUDE.md.

This is nodnarbnitram/claude-code-extensions's own configuration. It tells Claude Code how to work on claude-code-extensions 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-extensions configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

Reuse

Borrowing it

Nothing to install: this file belongs to nodnarbnitram/claude-code-extensions. 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/nodnarbnitram/claude-code-extensions/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/nodnarbnitram/claude-code-extensions

Made for: Claude Code.

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Per session 4,246 This file is loaded in full into every session.
When invoked 4,246 The same file — it is already loaded in full.
Security scan B 1 finding. 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 $0.04246 $0.04246
Opus 5.5 $0.01698 $0.01698
Sonnet 5.5 $0.00849 $0.00849
Haiku 4.5 $0.00425 $0.00425

Measured 2mo ago against content hash 7f1262f4ac0a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

claude-code-extensions CLAUDE.md scanned grade B with 1 finding 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

"hooks": "./.claude/settings.json"
CLAUDE.md · 598 lines

How it starts

The opening of the file, as written. The whole thing — 598 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenSpec Instructions

These instructions are for AI assistants working in this project.

Always open @/openspec/AGENTS.md when the request:

  • Mentions planning or proposals (words like proposal, spec, change, plan)
  • Introduces new capabilities, breaking changes, architecture shifts, or big performance/security work
  • Sounds ambiguous and you need the authoritative spec before coding

Use @/openspec/AGENTS.md to learn:

  • How to create and apply change proposals
  • Spec format and conventions
  • Project structure and guidelines

Keep this managed block so 'openspec update' can refresh the instructions.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Repository Purpose

This repository is a working project for creating and managing Claude Code extensions: agents, hooks, commands, skills, and output styles. When users request new extensions, you should create them here using the patterns and templates defined below.

Extension Creation

IMPORTANT: When creating extensions, use the appropriate tool:

For Agents: Use meta-agent at .claude/agents/meta-agent.md

  • Fetches the latest Claude Code documentation
  • Generates complete, production-ready agent files
  • Writes directly to .claude/agents/

For Skills: Use the /create-skill command

  • Syntax: /create-skill <name> "<description>" [doc-urls...]
  • Uses the skill skeleton template at templates/skill-skeleton/
  • Generates SKILL.md and README.md with proper structure
  • Evaluates and creates optional directories (templates/, scripts/, references/)
  • Writes directly to .claude/skills/

Project Structure

.claude/
├── settings.json          # Hook configuration (all lifecycle events registered)
├── agents/                # Organized by category: core, orchestrators, universal, specialized
├── hooks/                 # Python scripts for lifecycle events
│   └── utils/            # Shared utilities (llm/, tts/)
├── commands/             # Reusable slash commands
└── skills/               # Model-invoked capabilities (flat structure)

templates/
└── skill-skeleton/       # Starter template for new skills

docs/claude-code/         # Official Claude Code documentation
├── sub-agents.md
├── hooks.md
├── hooks-reference.md
├── commands-reference.md
├── agent-skills.md
└── output-styles.md

logs/                     # Runtime logs (generated by hooks)

Read the full file on GitHub · 598 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. 2mo ago First seen · 598 lines · 4,246 tokens per session scan B 7f1262f4ac0a

Subscribe to this mod's changes

claude-code-extensions CLAUDE.md is an instructions file published in the GitHub repository nodnarbnitram/claude-code-extensions (17 stars, last pushed 6mo ago), licensed MIT. It adds 4,246 tokens to every session, about $0.0170 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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