What is archagent-install?

An installation guide for the ArchAgent command-line tool, which lets you run ArchAgent from a terminal.

Installing, upgrading, checking, and troubleshooting the ArchAgent CLI.

It removes the guesswork around installing or upgrading the tool on macOS, Linux, and Windows, including common errors such as missing commands or permissions.

archagent-install — Skill for Claude Code and Codex by ArchAstro: An installation guide for the ArchAgent command-line tool, which…

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 skills/archastro/archagents/archagent-install

Any agent

npx skills add ArchAstro/archagents --skill archagent-install

Clone the repo

git clone --depth 1 https://github.com/ArchAstro/archagents

Made for: Claude Code, Codex.

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/skills/archastro/archagents/archagent-install.svg)](https://agentmods.dev/skills/archastro/archagents/archagent-install)

Your own site

<a href="https://agentmods.dev/skills/archastro/archagents/archagent-install"><img src="https://agentmods.dev/badge/skills/archastro/archagents/archagent-install.svg" alt="Measured on agentmods" height="20"></a>

Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 531 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 findings. 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	$0.00071	$0.00531
Opus 5	$0.00036	$0.00266
Sonnet 5	$0.00014	$0.00106
Haiku 4.5	$0.00007	$0.00053

Measured 3d ago against content hash c53009f1c1f4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

archagent-install scanned grade C with 2 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 3d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://raw.githubusercontent.com/ArchAstro/archagents/main/install.sh | bash

Makes network callslowCapability

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

allowed-tools: ["Bash(archagent:*)", "Bash(brew:*)", "Bash(curl:*)", "Bash(bash:*)", "Bash(sh:*)", "Bash(pwsh:*)", "Bash(powershell:*)"]

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

install — 94% identical, 2 lines differ

agents/archastro-onboarding/skills/archagent-install/SKILL.md · 51 lines

What it actually says

Install ArchAgent CLI

Install or upgrade the public archagent binary from Homebrew or GitHub Releases.

Workflow

Check whether the CLI is already installed:
```
archagent --version
```
If this succeeds, record the version.
If the CLI is present and the user didn't ask to upgrade, confirm the version and stop.

If the CLI is missing or the user asked to upgrade, install it using the public distribution path:

On macOS, if Homebrew is available:

brew install ArchAstro/tools/archagent

If the formula is already installed, run:

brew upgrade ArchAstro/tools/archagent

On Linux or macOS without Homebrew:

curl -fsSL https://raw.githubusercontent.com/ArchAstro/archagents/main/install.sh | bash

On Windows PowerShell:

irm https://raw.githubusercontent.com/ArchAstro/archagents/main/install.ps1 | iex

Verify installation:
```
archagent --version
```
On failure, help troubleshoot the public install path:
- Missing brew is expected on Linux and some macOS setups; fall back to install.sh.
- Permission denied usually means they need --install-dir or a user-writable target directory.
- command not found: archagent after install usually means the install directory is not on PATH.
- Release download failures usually mean the target release asset has not been published yet.
On success, tell the user the CLI is ready and suggest they run archagent setup to install the Claude Code/Codex plugins, then archagent auth login <email> to authenticate.

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.

3d ago First seen · 51 lines · 71 tokens per session scan C c53009f1c1f4

Subscribe to this mod's changes

archagent-install is a skill published in the GitHub repository ArchAstro/archagents (5 stars, last pushed 17d ago), licensed MIT. It adds 71 tokens to every session and 531 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, 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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