bash-pro

Instructions and patterns for writing defensive Bash scripts, which are command-line programs used to automate computer tasks.

In plain words
What is it for?
They support writing portable, testable scripts for automation, deployment pipelines, and system utilities.
Why use it?
They help reduce shell-script failures and unsafe behavior in production automation and continuous integration pipelines.

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/halay08/fullstack-agent-skills/bash-pro
Any agent
npx skills add halay08/fullstack-agent-skills --skill bash-pro
Clone the repo
git clone --depth 1 https://github.com/halay08/fullstack-agent-skills

Made for: Claude Code, Codex.

Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,242 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 3 findings. Scan, not verified.
Origin unknown 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 $0.00032 $0.04242
Opus 5 $0.00016 $0.02121
Sonnet 5 $0.00006 $0.00848
Haiku 4.5 $0.00003 $0.00424

Measured yesterday against content hash f046095e34f4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

bash-pro scanned grade D with 3 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 yesterday.

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.

- **Privilege analysis**: Audit scripts for unnecessary root/sudo requirements

Recursive force deletehighDestructive command

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

- End option parsing with `--` and use `rm -rf -- "$dir"` for safe operations

Makes network callslowCapability

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

- Implement `timeout` for external commands: `timeout 30s curl ...` prevents hangs
skills/bash-pro/SKILL.md · 311 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday First seen · 311 lines · 32 tokens per session scan D f046095e34f4

Subscribe to this mod's changes

bash-pro is a skill published in the GitHub repository halay08/fullstack-agent-skills (2 stars, last pushed 7mo ago), with no licence file. It adds 32 tokens to every session and 4,242 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it D with 3 findings (asks for root, recursive force delete, 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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