bash-linux

bash-linux is a skill for Claude Code from DDS-Solutions/AI-TadPole-OS. It costs 29 tokens per session (824 once invoked), scanned C, original, MIT.

A guide to using the Bash command-line shell and common Linux or macOS terminal tools, including pipes, conditional commands, error handling, and scripts.

In plain words
What is it for?
It helps run commands conditionally, connect tools with pipelines, handle failures, process text, and write reliable shell scripts.
Why use it?
Terminal commands can behave unexpectedly or hide errors when combined carelessly. These patterns make command-line work easier to understand and safer to automate.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit It helps run commands conditionally, connect tools with pipelines, handle failures, process text, and write reliable shell scripts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dds-solutions/ai-tadpole-os/bash-linux
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.

Any agent
npx skills add DDS-Solutions/AI-TadPole-OS --skill bash-linux
Clone the repo
git clone --depth 1 https://github.com/DDS-Solutions/AI-TadPole-OS

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.

agentmods badge for bash-linux

README.md
[![agentmods](https://agentmods.dev/badge/skills/dds-solutions/ai-tadpole-os/bash-linux/github.svg)](https://agentmods.dev/skills/dds-solutions/ai-tadpole-os/bash-linux)
Your own site
<a href="https://agentmods.dev/skills/dds-solutions/ai-tadpole-os/bash-linux"><img src="https://agentmods.dev/badge/skills/dds-solutions/ai-tadpole-os/bash-linux/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.

agentmods 80×15 button for bash-linux

Your own site · 80×15
<a href="https://agentmods.dev/skills/dds-solutions/ai-tadpole-os/bash-linux"><img src="https://agentmods.dev/badge/skills/dds-solutions/ai-tadpole-os/bash-linux.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 824 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.00824
Opus 5.5 $0.00012 $0.00330
Sonnet 5.5 $0.00006 $0.00165
Haiku 4.5 $0.00003 $0.00082

Measured 3d ago against content hash 99e7baf021ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

bash-linux scanned grade C 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 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/bash_validator.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

| Unquoted `rm -rf $DIR/*` | Empty variable wipes filesystem root | Always quote: `rm -rf "${DIR:?}/"*` |
.agent/skills/bash-linux/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

[!IMPORTANT] AI Context & Knowledge Heritage

  • Subsystem: Agent Skills Registry / bash-linux
  • Architecture: @docs ARCHITECTURE:Documentation
  • Failure Path: Information drift, legacy terminology, or documentation mismatch.
  • Observability: Traceability via execution/parity_guard.py ([SKILL])

Bash / Linux Terminal Patterns

Scope: Essential CLI execution, process management, and scripting patterns for macOS / Linux environments.


🎯 Progressive Disclosure & L3 Reference Index

Read REQUIRED terminal rules below; consult deep L3 Reference Guides on demand:

L3 Reference Guide / Tool Purpose Trigger / When to Load
references/posix_utilities_and_scripts.md Advanced text processing (awk/sed/jq), script boilerplates (set -euo pipefail) Linux scripting & text pipelines
scripts/bash_validator.py Deterministic shell script validator with safety checks & --test suite Automated bash script validation or self-test verification

1. Operator & Execution Syntax

Operator Action / Behavior Example
&& Execute second command only if first succeeds cargo build --release && ./target/release/server
|| Execute second command only if first fails npm test || echo "Tests failed"
| Stream stdout to stdin of next command ps aux | grep "tadpole"

2. Process & Port Control

# 1. Inspect processes listening on a port
lsof -i :8000

# 2. Terminate rogue process by port
kill -9 $(lsof -t -i :8000)

# 3. Stream live logs
tail -n 100 -f data/logs/engine.jsonl

🛡️ Socratic Gate: POSIX Target & Shell Boundary

Before writing or running bash scripts, confirm:

  1. Target Environment: Is the runtime guaranteed to be Linux/macOS? (On Windows, use powershell-windows).
  2. Strict Mode Invariant: Does the script specify set -euo pipefail?
  3. Safe Variable Expansion: Are all path variables enclosed in quotes (e.g. "$DIR")?

Read the full file on GitHub · 86 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago Changed · +27 lines 99e7baf021ae
  2. 1mo ago First seen · 59 lines · 29 tokens per session scan C f3e698f67116

Subscribe to this mod's changes

bash-linux is a skill published in the GitHub repository DDS-Solutions/AI-TadPole-OS (8 stars, last pushed 3d ago), licensed MIT. It adds 29 tokens to every session and 824 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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