documentation

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---
name: documentation
description: "Creates, structures, and reviews technical documentation following the Diátaxis framework (tutorials, how-to guides, reference, and explanation pages). Use when a user needs to write or reorganize docs, structure a tutorial vs. a how-to guide, build reference docs or API documentation, create explanation pages, choose between Diátaxis documentation types, or improve existing documentation structure. Trigger terms include: documentation structure, Diátaxis, tutorials vs how-to guides, organize docs, user guide, reference docs, technical writing."
metadata:
  tags: documentation, technical-writing, tutorials, guides, reference, diataxis
---

## When to use

Use this skill when you need to create, review, or improve technical documentation following the Diátaxis framework. Examples include:
- Creating user guides
- API documentation
- Tutorial content
- Restructuring existing documentation to better serve different user needs and contexts

## Instructions

Organize documentation into four distinct types — tutorials, how-to guides, reference material, and explanations — each serving different user needs and contexts.

Always ask clarifying questions about the user's context, audience, and goals **before** creating documentation.

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### Step 1 — Identify the documentation type

Use the following decision checklist based on user signals:

| User signal | Documentation type |
|---|---|
| "I'm new to X and want to learn it" / "walk me through" | **Tutorial** |
| "How do I…?" / "I need to accomplish X" | **How-to guide** |
| "What are the parameters/options/syntax for X?" | **Reference** |
| "Why does X work this way?" / "Help me understand X" | **Explanation** |

Quick decision tree:
- Is the user **learning by doing** for the first time? → Tutorial
- Do they need to **solve a specific problem** they already understand? → How-to guide
- Do they need **technical facts** to look up? → Reference
- Do they want **conceptual background**? → Explanation

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### Step 2 — Apply type-specific patterns

#### Tutorials (learning-oriented)
- **Title pattern:** Start with a verb — *"Build your first X"*, *"Create a Y from scratch"*
- Structure: Goal → Prerequisites → Numbered steps → Immediate verifiable result at each step → Final outcome
- Minimise explanation; maximise doing
- Every step must produce a visible, testable result
- **Validation:** A beginner must be able to complete the tutorial without external help

**Example intro:**
> *"In this tutorial, you will build a simple REST API using Express. By the end, you will have a running server that responds to GET requests. No prior Express experience is needed."*

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#### How-to guides (problem-oriented)
- **Title pattern:** Frame as a task — *"How to configure X"*, *"How to deploy Y to Z"*
- Structure: Goal statement → Assumptions/prerequisites → Numbered steps → Expected result
- Assume baseline knowledge; skip conceptual explanations
- Allow for variation; note alternatives where they exist
- **Validation:** An experienced user can complete the task without confusion or backtracking

**Example intro:**
> *"This guide shows how to add JWT authentication to an existing Express app. It assumes you have a working Express server and basic familiarity with middleware."*

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#### Reference (information-oriented)
- **Title pattern:** Name the thing — *"Configuration options"*, *"API endpoints"*, *"CLI flags"*
- Structure: Consistent repeatable format per entry (name → type → default → description → example)
- State facts; avoid instruction beyond minimal usage examples
- Keep current; version-stamp if needed
- **Validation:** A user can look up a specific fact in under 30 seconds without reading surrounding content

**Example entry:**
> **`timeout`** *(integer, default: `5000`)*
> Maximum time in milliseconds to wait for a response before the request fails.
> *Example:* `{ timeout: 3000 }`

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#### Explanations (understanding-oriented)
- **Title pat