terminal-command-explainer

Instantly explain any terminal command using AI — powered by Claude or OpenAI.

Never copy a command from Stack Overflow without understanding it again.

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What does this tool actually do?

It explains terminal commands. It does NOT run them.

You paste a command in as text — the AI tells you what it does, what every part means, whether it's safe, and if there's a better way to do it. Nothing on your computer is touched.

Think of it like Google Translate — but for terminal commands. You're translating a command into plain English, not executing it.

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Demo

$ explain "rm -rf node_modules"

╭─ Command Explained  via Claude ───────────────────────────────╮
│                                                               │
│  What it does                                                 │
│  Recursively deletes the node_modules folder and everything   │
│  inside it, with no confirmation prompt.                      │
│                                                               │
│  Breakdown                                                    │
│  • rm          — remove files or directories                  │
│  • -r          — recursive (go inside folders too)            │
│  • -f          — force (no "are you sure?" prompt)            │
│  • node_modules — the folder being targeted                   │
│                                                               │
│  Risk Level                                                   │
│  CAUTION — permanently deletes files, no undo                 │
│                                                               │
│  Safer Alternative                                            │
│  npx rimraf node_modules                                      │
│                                                               │
╰───────────────────────────────────────────────────────────────╯

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Features

• Explains what a command does in plain English
• Breaks down every flag and argument
• Rates risk level: SAFE / CAUTION / DANGEROUS
• Suggests safer alternatives when they exist
• Supports Claude (default) and OpenAI backends
• Clean, readable terminal output

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Complete Beginner Setup (Step by Step)

Step 1 — Make sure you have Python installed

Open your terminal and run:

python3 --version

You should see something like Python 3.9.x or higher. If not, download Python at python.org.

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Step 2 — Download this tool

git clone https://github.com/TheChyeahhh/terminal-command-explainer.git
cd terminal-command-explainer

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Step 3 — Create a virtual environment

This keeps the tool's dependencies isolated from the rest of your system (best practice):

python3 -m venv .venv

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Step 4 — Activate the virtual environment

Mac / Linux:

source .venv/bin/activate

Windows:

.venv\Scripts\activate

You'll know it worked when your terminal prompt shows (.venv) at the start.

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Step 5 — Install the tool

pip install -e .

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Step 6 — Add your API key

Copy the example config file:

cp .env.example .env

Open the .env file (it may be hidden — press Cmd + Shift + . on Mac to show hidden files) and replace the placeholder with your real API key:

ANTHROPIC_API_KEY=sk-ant-your-real-key-here
OPENAI_API_KEY=sk-your-real-key-here
AI_BACKEND=claude

• Get a Claude key at console.anthropic.com
• Get an OpenAI key at platform.openai.com

Your key stays on your machine inside .env — it is never shared or uploaded (the .gitignore blocks it).

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Step 7 — Run it

explain "any command you want to understand"

That's it. You're done.

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Everyday Usage

# Saw a scary command online? Check it before running it
explain "sudo rm -rf /tmp/*"

# Don't know what a flag does?
explain "ls -lah"

# Learning Docker?
explain "docker run -it --rm ubuntu bash"

# Confused by a Git command?
explain "git rebase -i HEAD~3"

# Use OpenAI instead of Claude
explain "chmod 755 script.sh" --backend openai

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Every time you come back (after closing terminal)

You need to re-activate the virtual environment each session:

cd terminal-command-explainer
source .venv/bin/activate   # Mac/Linux
explain "your command here"

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Output breakdown

Every response gives you 4 things:

Section	What it tells you
What it does	Plain English summary of the command
Breakdown	Every word, flag, and argument explained
Risk Level	SAFE / CAUTION / DANGEROUS with a reason
Safer Alternative	A better approach if one exists

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Requirements

• Python 3.9+
• A Claude API key and/or OpenAI API key

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Future Ideas

• --history flag to save explained commands to a local log
• Shell alias auto-installer (explain --install-alias)
• VS Code extension wrapper
• Batch mode: explain multiple commands from a file
• --risk-only flag for quick safety checks in CI pipelines

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License

MIT