Borrowing it
Nothing to install: this file belongs to castle-x/skills-x. 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/castle-x/skills-x/main/CLAUDE.mdgit clone --depth 1 https://github.com/castle-x/skills-xWrote 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/castle-x/skills-x/claude-md)<a href="https://agentmods.dev/instructions/castle-x/skills-x/claude-md"><img src="https://agentmods.dev/badge/instructions/castle-x/skills-x/claude-md.svg" alt="Measured on agentmods" 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 | $0.00518 | $0.00518 |
| Opus 5 | $0.00259 | $0.00259 |
| Sonnet 5 | $0.00104 | $0.00104 |
| Haiku 4.5 | $0.00052 | $0.00052 |
Grade A, and why
skills-x 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 8d 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.
What it actually says
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
Skills-X is a Go-based CLI tool for downloading and managing AI agent skills. It supports multiple AI IDEs (Claude Code, Cursor, Windsurf, CodeBuddy) and distributes skills via npm and Go install.
Common Commands
# Build the binary
make build
# Run tests
make test
# Run a single test
go test -v ./cmd/skills-x/command/initcmd/...
# Install to ~/.local/bin
make install-local
# Build cross-platform binaries for npm release
make build-npm
# Build all platforms to bin/
make build-all
Architecture
- CLI Framework: Uses Cobra (
github.com/spf13/cobra) - Commands:
list,init,tui(seecmd/skills-x/command/) - Core Packages:
pkg/registry/- Skill registry (registry.yaml)pkg/discover/- Skill discoverypkg/gitutil/- Git utilities for cloning skillspkg/versioncheck/- Version checking against GitHub releases
- Skills: Embedded in binary at
cmd/skills-x/skills/skills/viago:embed. Runmake sync-skillsbefore building to update embedded skills. - i18n: Translations in
cmd/skills-x/i18n/locales/(en.yaml, zh.yaml)
Development Workflow
This project uses a plan-first workflow (see .cursor/rules/development-workflow.mdc):
- Discussion Phase: When users提出需求, discuss the approach first
- Plan Confirmation: Wait for user to confirm the plan
- Execution Phase: Only start coding after explicit instructions like "开始开发" or "start development"
- Documentation: Save implementation plans to
docs/before coding
Key Files
cmd/skills-x/main.go- Entry point, registers commandscmd/skills-x/command/initcmd/init.go- Download/install skillscmd/skills-x/command/list/list.go- List available skillscmd/skills-x/tui/- Interactive TUI for skill managementpkg/registry/registry.yaml- Skill registry definition
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.
- 8d ago First seen · 59 lines · 518 tokens per session scan A b3799c367ad5
skills-x CLAUDE.md is an instructions file published in the GitHub repository castle-x/skills-x (18 stars, last pushed 4mo ago), licensed MIT. It adds 518 tokens to every session, about $0.0026 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.
Other instructions, from other repositories
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
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.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.