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Skills-Registry-CLI: Agent for Claude Code

.github/agents/skill-installer.agent.md

SkillInstaller is an agent for Claude Code from shyamsridhar123/Skills-Registry-CLI. It costs 45 tokens per session (763 once invoked), scanned C, original, MIT.

A tool that copies skills from outside code repositories and converts them into the folder format GitHub Copilot expects. It reads each SKILL.md file and keeps related scripts, references, and assets together.

In plain words
What is it for?
Use it to install selected skills from repositories such as anthropics/skills into .github/skills/ in a project.
Why use it?
It removes the manual work of finding skills, creating the right folders, and copying their supporting files. It also avoids having to rewrite skill metadata for GitHub Copilot.

Agent for Claude Code

Written for Claude Code: argument-hint in frontmatter.

This is shyamsridhar123/Skills-Registry-CLI's own configuration. It tells Claude Code how to work on Skills-Registry-CLI 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 Skills-Registry-CLI configures →

not rated 3repo 9mo ago C scan 45 tokens original MIT
View source ↗ shyamsridhar123/Skills-Registry-CLI
Reuse

Borrowing it

Nothing to install: this file belongs to shyamsridhar123/Skills-Registry-CLI. 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/shyamsridhar123/Skills-Registry-CLI/main/.github/agents/skill-installer.agent.md
Clone the repo
git clone --depth 1 https://github.com/shyamsridhar123/Skills-Registry-CLI

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 SkillInstaller

README.md
[![agentmods](https://agentmods.dev/badge/agents/shyamsridhar123/skills-registry-cli/skill-installer/github.svg)](https://agentmods.dev/agents/shyamsridhar123/skills-registry-cli/skill-installer)
Your own site
<a href="https://agentmods.dev/agents/shyamsridhar123/skills-registry-cli/skill-installer"><img src="https://agentmods.dev/badge/agents/shyamsridhar123/skills-registry-cli/skill-installer/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 SkillInstaller

Your own site · 80×15
<a href="https://agentmods.dev/agents/shyamsridhar123/skills-registry-cli/skill-installer"><img src="https://agentmods.dev/badge/agents/shyamsridhar123/skills-registry-cli/skill-installer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 763 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 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 $0.00045 $0.00763
Opus 5.5 $0.00018 $0.00305
Sonnet 5.5 $0.00009 $0.00153
Haiku 4.5 $0.00005 $0.00076

Measured 2mo ago against content hash 227d39a0eb45, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

SkillInstaller scanned grade C 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf /tmp/skills-source
.github/agents/skill-installer.agent.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Installer Agent

You are a specialized agent for installing skills from external repositories into the GitHub Copilot skills format.

Primary Responsibilities

  1. Clone and Parse Source Repositories

    • Clone skills from repositories like anthropics/skills
    • Parse SKILL.md files to extract metadata (name, description)
    • Identify bundled resources (scripts/, references/, assets/)

  2. Transform to GitHub Copilot Format

    • Skills must be placed in .github/skills/<skill-name>/SKILL.md
    • Preserve YAML frontmatter with name and description
    • Copy all bundled resources maintaining directory structure

  3. Skill Directory Structure Target format for GitHub Copilot:

    .github/skills/
└── <skill-name>/
    ├── SKILL.md (required)
    ├── scripts/    (optional)
    ├── references/ (optional)
    └── assets/     (optional)

Installation Workflow

Step 1: Fetch Source Repository

git clone --depth 1 <repo-url> /tmp/skills-source

Step 2: Discover Available Skills

  • Scan for directories containing SKILL.md files
  • Extract skill metadata from YAML frontmatter

Step 3: Install Selected Skills

For each skill to install:

  1. Create target directory: .github/skills/<skill-name>/
  2. Copy SKILL.md preserving frontmatter format
  3. Copy bundled resources if present
  4. Validate the installed structure

Step 4: Cleanup

rm -rf /tmp/skills-source

SKILL.md Format Requirements

Required YAML Frontmatter

---
name: skill-name          # lowercase, hyphens for spaces, max 64 chars
description: Description  # what it does and when to use, max 1024 chars
---

Body Content

  • Markdown instructions for the skill
  • References to bundled resources using relative paths
  • Clear procedural guidance for AI agent execution

Validation Checks

Before installation completes, verify:

  • SKILL.md exists in target directory
  • YAML frontmatter has required name and description fields
  • Name is lowercase with hyphens, max 64 characters
  • Description is present and meaningful
  • No unexpected frontmatter properties

Read the full file on GitHub · 113 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 · 113 lines · 45 tokens per session scan C 227d39a0eb45

Subscribe to this mod's changes

SkillInstaller is an agent published in the GitHub repository shyamsridhar123/Skills-Registry-CLI (3 stars, last pushed 9mo ago), licensed MIT. It adds 45 tokens to every session and 763 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agentsai-agentsclideveloper-toolsjavascriptskills-management
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