A guide to running shell commands, which are text instructions used to work with files, programs, and development tools. It covers timing commands and stopping commands that run too long.

Running builds, tests, deployments, and diagnostic commands with time limits and execution-duration checks.

It helps prevent builds, tests, or deployments from hanging indefinitely and makes long-running work easier to measure.

How Cogni-AI-OU/vastai-host-mcp configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to Cogni-AI-OU/vastai-host-mcp. 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/Cogni-AI-OU/vastai-host-mcp/main/.github/skills/shell/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Cogni-AI-OU/vastai-host-mcp

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/cogni-ai-ou/vastai-host-mcp/shell/github.svg)](https://agentmods.dev/skills/cogni-ai-ou/vastai-host-mcp/shell)

Your own site

<a href="https://agentmods.dev/skills/cogni-ai-ou/vastai-host-mcp/shell"><img src="https://agentmods.dev/badge/skills/cogni-ai-ou/vastai-host-mcp/shell/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/skills/cogni-ai-ou/vastai-host-mcp/shell"><img src="https://agentmods.dev/badge/skills/cogni-ai-ou/vastai-host-mcp/shell.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 225 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. 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	$0.00000	$0.00225
Opus 5.5	$0.00000	$0.00090
Sonnet 5.5	$0.00000	$0.00045
Haiku 4.5	$0.00000	$0.00022

Measured 2mo ago against content hash 7d189cac55f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

shell 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 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.

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.

.github/skills/shell/SKILL.md · 51 lines

What it actually says

name: shell description: Efficient shell command handling license: MIT

Shell Handling Skill

Execute shell commands with performance monitoring and timeout protection.

When to Use

Long-running commands (builds, tests, deployments)
Commands that might hang indefinitely
Performance optimization and debugging

Core Patterns

Measure Execution Time

Prefix commands with time for duration visibility:

time command
time npm run build

Limit Execution Time

Use timeout to prevent indefinite hangs:

timeout 30s command
timeout 60s npm test || echo "Failed or timed out"

Combined Usage

time timeout 300s build_script.sh

Key Points

Use time for all long operations to track performance
Set timeout based on expected runtime plus buffer
Combine with || for error handling fallbacks
timeout --kill-after=5s 30s for forceful termination if needed

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.

2mo ago First seen · 51 lines · 0 tokens per session scan A 7d189cac55f0

Subscribe to this mod's changes

shell is a skill published in the GitHub repository Cogni-AI-OU/vastai-host-mcp (0 stars, last pushed 29d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 225 tokens. 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 2026-08-31.

shell next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
shellCogni-AI-OU/vastai-host-mcp	Skill	0	29d ago	MIT	A	0	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code

vastai-host-mcp: Skill for Claude Code