How do I install the Shell skill?

Run npx skillmds@latest add bytesagain/shell in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Shell safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Shell?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Shell free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

bytesagain (@bytesagain) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Shell by bytesagain — Agent Skill

Name: Shell
Rating: 4.2 (5 reviews)
Author: bytesagain

File contents

Shell — Shell Scripting Reference

Quick-reference skill for Bash shell scripting, built-in features, and best practices.

When to Use

Writing reliable Bash scripts with proper error handling
Understanding redirections, pipes, and process substitution
Managing signals, traps, and background processes
Debugging shell scripts with set options and tracing
Choosing between shell features and external tools

Commands

`intro`

scripts/script.sh intro

Overview of shell scripting — Bash features, shebang, execution, portability.

`variables`

scripts/script.sh variables

Variables — declaration, scope, arrays, parameter expansion, special variables.

`control`

scripts/script.sh control

Control flow — if/else, case, for, while, until, select, functions.

`redirections`

scripts/script.sh redirections

Redirections and pipes — stdin/stdout/stderr, heredocs, process substitution.

`safety`

scripts/script.sh safety

Safety practices — set -euo pipefail, quoting, shellcheck, error handling.

`tools`

scripts/script.sh tools

Essential tools — awk, sed, grep, find, xargs, cut, sort, jq patterns.

`signals`

scripts/script.sh signals

Signals and traps — SIGTERM, SIGINT, cleanup handlers, background jobs.

`checklist`

scripts/script.sh checklist

Shell script quality checklist.

`help`

scripts/script.sh help

`version`

scripts/script.sh version

Configuration

Variable	Description
`SHELL_DIR`	Data directory (default: ~/.shell/)

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---name: shelldescription: Shell scripting reference — Bash syntax, redirections, process substitution, signal handling, debugging techniques. Use when writing shell scripts, troubleshooting Bash behavior, or automating system tasks.--- # Shell — Shell Scripting Reference Quick-reference skill for Bash shell scripting, built-in features, and best practices. ## When to Use - Writing reliable Bash scripts with proper error handling - Understanding redirections, pipes, and process substitution - Managing signals, traps, and background processes - Debugging shell scripts with set options and tracing - Choosing between shell features and external tools ## Commands ### `intro` ```bash scripts/script.sh intro ``` Overview of shell scripting — Bash features, shebang, execution, portability. ### `variables` ```bash scripts/script.sh variables ``` Variables — declaration, scope, arrays, parameter expansion, special variables. ### `control` ```bash scripts/script.sh control ``` Control flow — if/else, case, for, while, until, select, functions. ### `redirections` ```bash scripts/script.sh redirections ``` Redirections and pipes — stdin/stdout/stderr, heredocs, process substitution. ### `safety` ```bash scripts/script.sh safety ``` Safety practices — set -euo pipefail, quoting, shellcheck, error handling. ### `tools` ```bash scripts/script.sh tools ``` Essential tools — awk, sed, grep, find, xargs, cut, sort, jq patterns. ### `signals` ```bash scripts/script.sh signals ``` Signals and traps — SIGTERM, SIGINT, cleanup handlers, background jobs. ### `checklist` ```bash scripts/script.sh checklist ``` Shell script quality checklist. ### `help` ```bash scripts/script.sh help ``` ### `version` ```bash scripts/script.sh version ``` ## Configuration | Variable | Description | |----------|-------------| | `SHELL_DIR` | Data directory (default: ~/.shell/) | --- *Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*

Frequently asked questions

Shell

File contents

Shell — Shell Scripting Reference

When to Use

Commands

intro

variables

control

redirections

safety

tools

signals

checklist

help

version