name	docs-writing
description	Technical documentation writing guidelines, standards, and best practices.
version	1.0.0
author	magic
license	MIT
metadata	{"hermes":{"tags":["documentation","technical-writing","markdown","docs"],"category":"software-development"}}

Technical Documentation Writing Guide

Guidelines and best practices for writing clear, comprehensive technical documentation.

When to Use

Load this skill when:

Writing API documentation
Creating README files
Documenting code (comments, docstrings)
Writing tutorials or guides
Creating architecture documentation
Setting up documentation systems

Quick Reference

Documentation Types

📄 README.md          - Project overview, quick start
📄 API.md             - API endpoint documentation
📄 CONTRIBUTING.md   - Contribution guidelines
📄 ARCHITECTURE.md   - System design, components
📄 TUTORIAL.md        - Step-by-step guides
📄 CHANGELOG.md       - Version history

Markdown Templates

## Quick Start
1. Install: `npm install`
2. Configure: Edit `config.json`
3. Run: `npm start`

## API Reference
### `functionName(param1, param2)`
> Brief description of what the function does.

**Parameters:**
- `param1` (string, required): Description
- `param2` (number, optional): Description

**Returns:** Description of return value

**Example:**
\```javascript
const result = functionName("test", 123);
console.log(result);
\```

README Structure

Standard README Template

# Project Name

> One-line description of the project

[![Build Status](badge-url)](build-url)
[![Version](version-badge)](version-url)

## Features
- ✨ Feature 1: Brief description
- 🚀 Feature 2: Brief description
- 🔒 Feature 3: Brief description

## Quick Start
\```bash
# Install
npm install my-library

# Usage
import { myFunction } from 'my-library';
\```

## Documentation
- [API Reference](API.md)
- [Contributing](CONTRIBUTING.md)
- [Changelog](CHANGELOG.md)

## License
[MIT](LICENSE)

API Documentation

REST API Endpoint

### GET /api/users/{id}

Retrieve a user by ID.

**URL Parameters:**
- `id` (required): User ID (UUID)

**Headers:**
- `Authorization: Bearer <token>` (required)
- `Accept: application/json` (optional)

**Response:**
\```json
{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "name": "John Doe",
  "email": "john@example.com"
}
\```

**Error Responses:**
- `404 Not Found`: User not found
- `401 Unauthorized`: Invalid or missing token

Function/Method Documentation

// GetUser retrieves a user by ID from the database.
// If the user does not exist, it returns ErrNotFound.
//
// Parameters:
//   - ctx: Context for cancellation and timeouts
//   - id: User ID (UUID format)
//
// Returns:
//   - *User: The user object if found
//   - error: ErrNotFound if user doesn't exist, or other error
func GetUser(ctx context.Context, id string) (*User, error) {
    // ...
}

Writing Style

Do's ✅

Use active voice: "Click the button" not "The button should be clicked"
Be concise: Remove filler words
Use present tense: "Returns the value" not "Will return"
Include examples: Show, don't just tell
Use consistent terminology: Pick one term and stick with it
Structure with headers: Make it scannable

Don'ts ❌

Avoid jargon without explanation
Don't assume prior knowledge without linking
Avoid long paragraphs (keep under 3-4 sentences)
Don't use "obviously" or "simply" (alienating)
Avoid passive voice in instructions

Code Examples

Good Code Examples

// ✅ Good: Clear, complete, with comments
/**
 * Calculates the total price including tax.
 * @param {number} subtotal - The subtotal amount
 * @param {number} taxRate - Tax rate as decimal (e.g., 0.1 for 10%)
 * @returns {number} Total price
 */
function calculateTotal(subtotal, taxRate) {
  const tax = subtotal * taxRate;
  return subtotal + tax;
}

// Usage example
const total = calculateTotal(100, 0.1); // 110

Bad Code Examples (and fixes)

# ❌ Bad: No context, unclear variable names
def p(l):
    for i in l:
        print(i)

# ✅ Good: Clear function name, descriptive variables
def print_items(items):
    """Print each item in the list."""
    for item in items:
        print(item)

Documentation Tools

Generators

Tool	Language	Output
Swagger/OpenAPI	All	Interactive API docs
JSDoc	JavaScript	HTML documentation
Sphinx	Python	HTML, PDF, ePub
Godoc	Go	HTML (from code)
GitBook	Markdown	Beautiful docs site

Markdown Enhancements

# Mermaid for diagrams (in Markdown)
```mermaid
graph TD
    A[Start] --> B{Decision}
    B -->|Yes| C[Process 1]
    B -->|No| D[Process 2]

PlantUML for UML

@startuml
class User {
  +id: UUID
  +name: string
}
@enduml


## README Checklist

Before publishing, verify:
- [ ] Clear project description (one-line)
- [ ] Badges (build, version, license)
- [ ] Installation instructions
- [ ] Usage examples
- [ ] API documentation linked
- [ ] Contributing guidelines
- [ ] License file
- [ ] Live demo or screenshots (if applicable)
- [ ] Table of contents (for long READMEs)

## Pitfalls

### Outdated Documentation
**Problem**: Docs don't match code  
**Solution**: 
- Update docs in same PR as code changes
- Use CI to check docs build
- Review docs during code review

### Too Much Jargon
**Problem**: Unclear to beginners  
**Solution**: 
- Define terms on first use
- Link to explanations
- Provide "Prerequisites" section

### Missing Examples
**Problem**: Users can't figure out usage  
**Solution**: 
- Include at least one complete example
- Show both simple and advanced usage
- Provide copy-pasteable code

## Verification

After writing documentation:
1. Spell-check: `codespell .` or your IDE
2. Link check: `markdown-link-check README.md`
3. Render preview: Most Markdown editors have preview
4. Test all code examples manually
5. Have someone unfamiliar read it for clarity

## Tools & References

- [Google Technical Writing Course](https://developers.google.com/tech-writing)
- [Write the Docs](https://www.writethedocs.org/)
- [Markdown Guide](https://www.markdownguide.org/)
- [API Documentation Best Practices](https://swagger.io/resources/articles/best-practices-in-api-documentation/)
- [README Best Practices](https://github.com/ddmee/readme-best-practices)