What is openskill CLAUDE.md?

Repository instructions for OpenSkill, a command-line tool that manages skills for several AI coding assistants. They describe the project layout, commands, architecture, and how to add commands or agents.

Use them when building, testing, or extending OpenSkill, including adding CLI commands or agents and running its TypeScript development commands.

They give an AI coding assistant the project context needed to work in the repository without guessing where code, tests, and documentation belong.

openskill CLAUDE.md — Instructions file for coding agents by vudknguyen: Repository instructions for OpenSkill, a command-line tool that man

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.

agentmods

npx agentmods add instructions/vudknguyen/openskill/claude-md

Clone the repo

git clone --depth 1 https://github.com/vudknguyen/openskill

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/vudknguyen/openskill/claude-md.svg)](https://agentmods.dev/instructions/vudknguyen/openskill/claude-md)

Your own site

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

Per session 2,033 This file is loaded in full into every session.

When invoked 2,033 The same file — it is already loaded in full.

Security scan A 1 finding. Scan, not verified.

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	$0.02033	$0.02033
Opus 5	$0.01017	$0.01017
Sonnet 5	$0.00407	$0.00407
Haiku 4.5	$0.00203	$0.00203

Measured 4d ago against content hash a46b1196ac5e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openskill CLAUDE.md scanned grade A 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 4d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

│ ├── git.ts # Git operations via Node child_process

CLAUDE.md · 186 lines

How it starts

The opening of the file, as written. The whole thing — 186 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

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

Quick Reference for AI Agents

Entry point: src/cli/index.ts
Add new commands: Create file in src/cli/, register in index.ts
Add new agents: Implement Agent interface in src/agents/, register in src/agents/index.ts
Tests: src/__tests__/*.test.ts (run with npm test)
Full architecture docs: docs/architecture.md

Project Overview

OpenSkill (osk) is a lightweight, agent-agnostic CLI for managing AI coding agent skills. Supports Claude Code, Antigravity, OpenAI Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode, Windsurf, Kiro, Warp, OpenClaw, and the generic Agents spec.

Build Commands

npm install          # Install dependencies
npm run build        # Compile TypeScript to dist/
npm run dev          # Watch mode for development
npm test             # Run tests with vitest

Running the CLI

node dist/cli/index.js <command>   # Run locally
osk <command>                      # After npm link

Architecture

src/
├── cli/           # Command handlers (commander.js)
│   ├── index.ts   # Entry point
│   ├── install.ts # Install with interactive agent/skill selection
│   └── ...        # list, uninstall, update, search, browse, repo, config, etc.
├── core/          # Business logic
│   ├── config.ts  # JSON config (~/.openskill/config.json)
│   ├── git.ts     # Git operations via Node child_process
│   ├── skill.ts   # Skill parsing/validation
│   ├── registry.ts # Git repository cache operations
│   └── manifest.ts # Installed skills tracking (~/.openskill/manifest.json)
├── agents/        # Agent adapters (strategy pattern)
│   ├── types.ts   # Agent interface
│   └── *.ts       # claude, antigravity, codex, cursor, gemini, copilot, opencode, windsurf, kiro, warp, openclaw, agents
└── utils/
    ├── logger.ts  # ANSI colors (no deps)
    ├── prompt.ts  # Interactive prompts (@inquirer/prompts)
    ├── markdown.ts # Frontmatter parsing (gray-matter)
    └── fs.ts      # File helpers

Read the full file on GitHub · 186 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.

4d ago First seen · 186 lines · 2,033 tokens per session scan A a46b1196ac5e

Subscribe to this mod's changes

openskill CLAUDE.md is an instructions file published in the GitHub repository vudknguyen/openskill (10 stars, last pushed 4mo ago), licensed MIT. It adds 2,033 tokens to every session, about $0.0102 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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 · 6,785 tokens

openskill CLAUDE.md