bash

A reference for using the Bash command-line shell and common terminal commands. Bash is a text-based interface for inspecting files, running programs, and working with projects.

In plain words
What is it for?
Checking a project directory, finding files, verifying installed commands, running shell tasks, and using tools such as Git, Python, Node, or Docker.
Why use it?
It helps an assistant choose available commands correctly and follow basic safety and workflow practices when working in a terminal.

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/parendumou/nexora/bash
Any agent
npx skills add ParendumOU/Nexora --skill bash
Clone the repo
git clone --depth 1 https://github.com/ParendumOU/Nexora

Made for: Claude Code, Codex.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 150 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00000 $0.00150
Opus 5 $0.00000 $0.00075
Sonnet 5 $0.00000 $0.00030
Haiku 4.5 $0.00000 $0.00015

Measured 2d ago against content hash 65e853f62ac8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

bash scanned grade A 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.

Makes network callslowCapability

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

Standard Unix/Linux: `ls`, `cat`, `grep`, `find`, `curl`, `python3`, `node`, `git`, `docker`, etc.
backend/src/seeds/skills/builtin/bash/SKILL.md · 18 lines

What it actually says

Bash Shell

Run shell cmds in sandboxed container.

Available commands

Standard Unix/Linux: ls, cat, grep, find, curl, python3, node, git, docker, etc.

Usage

  • Inspect cwd with ls before writing files
  • Use which <cmd> → verify tool available before relying on it
  • Pipe to head or tail for large output
  • Use set -e in multi-step scripts → exit on first error

Example

[{"name": "shell_run", "args": {"command": "find /app/src -name '*.py' | head -20"}}]
Files

What ships with it

1 file 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. 2d ago First seen · 18 lines · 0 tokens per session scan A 65e853f62ac8

Subscribe to this mod's changes

bash is a skill published in the GitHub repository ParendumOU/Nexora (19 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 150 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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