# Explain Code

> Explain code in plain language with examples

- Skill: `chainlesschain/explain-code` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add chainlesschain/explain-code`
- Raw SKILL.md: https://api.skillmd.com/api/skills/chainlesschain/explain-code/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: chainlesschain (https://skillmd.com/u/chainlesschain)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/chainlesschain/explain-code

---


# Explain Code Skill

Provides clear, beginner-friendly explanations of code snippets or files.

## Usage

```
/explain-code [file_path or code snippet]
```

## Options

- `--level <level>` - Detail level: brief, normal, detailed (default: normal)
- `--focus <area>` - Focus on: logic, performance, security, all

## What Gets Explained

1. **Overall Purpose**
   - What the code does
   - Why it might be needed

2. **Key Components**
   - Functions and their roles
   - Important variables
   - Data structures used

3. **Control Flow**
   - How data moves through the code
   - Conditional branches
   - Loops and iterations

4. **External Dependencies**
   - Libraries used
   - APIs called

## Examples

Explain a file:

```
/explain-code src/utils/crypto.js
```

Explain with detailed level:

```
/explain-code --level detailed
async function fetchData(url) {
  const response = await fetch(url);
  return response.json();
}
```

## Output Format

```markdown
## Overview

This code implements a data fetching utility...

## Line-by-Line Breakdown

### Line 1: Function Declaration

`async function fetchData(url)`

- `async` allows the function to use await
- `url` parameter expects a string URL

### Line 2: Fetch Call

`const response = await fetch(url)`

- `fetch()` makes an HTTP GET request
- `await` pauses until the request completes

### Line 3: Return JSON

`return response.json()`

- Parses the response body as JSON
- Also returns a Promise

## Summary

This is an async utility for fetching JSON data from APIs.
```