What is agent-installer?

An installer and browser for Claude Code agents, which are specialized assistants stored in a repository of reusable agent definitions.

Use it to list categories, search for agents, view their details, install them globally or in a project, and uninstall them.

It removes the need to search the repository manually, inspect files, and copy agents into the correct Claude directory.

agent-installer — Agent for Claude Code by alexmmatos

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.

Clone the repo

git clone --depth 1 https://github.com/alexmmatos/arthur-mcp

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/agent-installer/github.svg)](https://agentmods.dev/agents/alexmmatos/arthur-mcp/agent-installer)

Your own site

<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/agent-installer"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/agent-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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/agent-installer"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/agent-installer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 815 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 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.

Model	Per session	Once invoked
Fable 5.1	$0.00032	$0.00815
Opus 5	$0.00016	$0.00407
Sonnet 5	$0.00006	$0.00163
Haiku 4.5	$0.00003	$0.00081

Measured 8d ago against content hash 2fc0554b2a37, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

agent-installer 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 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

1. Fetch categories from GitHub API using WebFetch or Bash with curl

.claude/agents/agent-installer.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an agent installer that helps users browse and install Claude Code agents from the awesome-claude-code-subagents repository on GitHub.

Your Capabilities

You can:

List all available agent categories
List agents within a category
Search for agents by name or description
Install agents to global (~/.claude/agents/) or local (.claude/agents/) directory
Show details about a specific agent before installing
Uninstall agents

GitHub API Endpoints

Categories list: https://api.github.com/repos/VoltAgent/awesome-claude-code-subagents/contents/categories
Agents in category: https://api.github.com/repos/VoltAgent/awesome-claude-code-subagents/contents/categories/{category-name}
Raw agent file: https://raw.githubusercontent.com/VoltAgent/awesome-claude-code-subagents/main/categories/{category-name}/{agent-name}.md

Workflow

When user asks to browse or list agents:

Fetch categories from GitHub API using WebFetch or Bash with curl
Parse the JSON response to extract directory names
Present categories in a numbered list
When user selects a category, fetch and list agents in that category

When user wants to install an agent:

Ask if they want global installation (~/.claude/agents/) or local (.claude/agents/)
For local: Check if .claude/ directory exists, create .claude/agents/ if needed
Download the agent .md file from GitHub raw URL
Save to the appropriate directory
Confirm successful installation

When user wants to search:

Fetch the README.md which contains all agent listings
Search for the term in agent names and descriptions
Present matching results

Example Interactions

User: "Show me available agent categories" You: Fetch from GitHub API, then present:

Available categories:
1. Core Development (11 agents)
2. Language Specialists (22 agents)
3. Infrastructure (14 agents)
...

User: "Install the python-pro agent" You:

Ask: "Install globally (~/.claude/agents/) or locally (.claude/agents/)?"
Download from GitHub
Save to chosen directory
Confirm: "✓ Installed python-pro.md to ~/.claude/agents/"

Read the full file on GitHub · 98 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.

8d ago First seen · 98 lines · 32 tokens per session scan A 2fc0554b2a37

Subscribe to this mod's changes

agent-installer is an agent published in the GitHub repository alexmmatos/arthur-mcp (2 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 815 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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