shell

A command-line environment for working with files, programs, and scripts through a terminal. It includes commands for navigating folders, moving files, chaining commands, and setting permissions.

In plain words
What is it for?
Use it to inspect and change folders, copy or move files, remove items, run scripts, combine command output, and control which users can run files.
Why use it?
It provides a repeatable way to perform development and operations tasks without clicking through graphical tools.

Skill for Claude CodeCodex

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/dhaupin/vant/vant-skill-shell
Any agent
npx skills add dhaupin/vant --skill vant-skill-shell
Clone the repo
git clone --depth 1 https://github.com/dhaupin/vant

Made for: Claude Code, Codex.

Per session 5 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 209 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 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.

ModelPer sessionOnce invoked
Fable 5 $0.00005 $0.00209
Opus 5 $0.00003 $0.00105
Sonnet 5 $0.00001 $0.00042
Haiku 4.5 $0.00001 $0.00021

Measured 2d ago against content hash f5e5f2ba7dd0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

shell scanned grade B 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 2d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

chmod 755 script.sh
models/public/skills/vant-skill-shell/SKILL.md · 66 lines

What it actually says

Shell

Command line.


When To Use

  • Terminal work
  • Scripts
  • DevOps

What To Do

1. Basics

Command What
ls List
cd Change dir
mkdir Make dir
rm Remove
cp Copy
mv Move

2. Pipes

command1 | command2
cat file | grep pattern | sort

3. Scripts

#!/bin/bash
for f in *.txt; do
  echo "$f"
done

4. Permissions

chmod +x script.sh
chmod 755 script.sh

Role: Shell User
Input: Commands
Output: Results

CLI.

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. 2d ago First seen · 66 lines · 5 tokens per session scan B f5e5f2ba7dd0

Subscribe to this mod's changes

shell is a skill published in the GitHub repository dhaupin/vant (9 stars, last pushed 3d ago), licensed MIT. It adds 5 tokens to every session and 209 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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