Imported from nickcrew/claude-cortex (skills/tutorial-design/SKILL.md). Install upstream with npx skills add nickcrew/claude-cortex --skill tutorial-design. Copyright stays with the author.

Tutorial Design

Design and write hands-on tutorials that transform complex technical concepts into engaging, progressive learning experiences with exercises, checkpoints, and troubleshooting guidance.

When to Use This Skill

• Writing a getting-started tutorial for a library, API, or tool
• Creating workshop materials for team training or conferences
• Building multi-part learning series with progressive difficulty
• Designing coding exercises with self-assessment checkpoints
• Converting existing documentation into guided learning content
• Creating quick-start guides that get users productive fast

Quick Reference

Workflow Overview

Phase 1: Objectives   → Define learning outcomes, prerequisites, and audience
Phase 2: Decompose    → Break concepts into atomic, sequenced steps
Phase 3: Design       → Create exercises, checkpoints, and troubleshooting tips
Phase 4: Write        → Produce tutorial content with runnable examples
Phase 5: Validate     → Test the tutorial path end-to-end

Phase 1: Define Learning Objectives

Every tutorial starts with clear outcomes.

Opening Section Template

## What You'll Learn

- [Specific, measurable outcome 1]
- [Specific, measurable outcome 2]
- [Specific, measurable outcome 3]

## Prerequisites

- [Required knowledge or setup]
- [Tools needed]

## Time Estimate

~[X] minutes

## What You'll Build

[Brief description or screenshot of the final result]

Writing good objectives:

• Use action verbs: "build", "configure", "debug", "deploy" — not "understand" or "learn about"
• Make them testable: the reader should be able to verify they achieved each outcome
• Scope realistically: 3-5 objectives per tutorial

Phase 2: Concept Decomposition

Break the topic into atomic learning steps.

Sequencing Rules

1. One concept per section — never introduce two new ideas at once
2. Dependency order — concepts must build on what came before
3. Concrete before abstract — show the working example, then explain the theory
4. Simple before complex — start with the minimal version, layer complexity

Concept Map

Before writing, sketch a dependency graph:

[Prerequisites] → [Core concept A] → [Core concept B]
                                    ↘ [Variation 1]
                  [Core concept A] → [Core concept C] → [Advanced topic]

Each node becomes a section. Dependencies become the section order.

Phase 3: Design Exercises and Checkpoints

Exercise Types

Checkpoint Pattern

After every major section, insert a checkpoint:

### Checkpoint

At this point you should have:
- [ ] A running server on port 3000
- [ ] The `/health` endpoint returning `{ "status": "ok" }`
- [ ] Server logs showing incoming requests

**If something's wrong**, see the [Troubleshooting](#troubleshooting) section below.

Troubleshooting Sections

For every section, anticipate 2-3 common errors:

### Troubleshooting

**Error: `EADDRINUSE: address already in use`**
Another process is using port 3000. Run `lsof -i :3000` to find it,
then stop it or change your port.

**Error: `Cannot find module 'express'`**
You haven't installed dependencies yet. Run `npm install` in the project root.

Phase 4: Write the Tutorial

Section Structure (for each concept)

1. Brief intro (1-2 sentences) — what this section covers and why it matters
2. Minimal example — complete, runnable code showing the concept
3. Line-by-line explanation — walk through the important parts
4. Try it — tell the reader to run the code and what to expect
5. Extend it — optional exercise to deepen understanding
6. Troubleshooting — common errors for this section

Writing Principles

• Show, then explain — code first, theory second
• Frequent validation — readers should run code every 2-3 minutes
• Fail forward — include intentional errors to teach debugging
• Incremental complexity — each step adds one thing to the previous
• Copy-paste friendly — examples must work when pasted directly

Content Elements

Code blocks must:

• Be complete and runnable (no ... elisions in critical paths)
• Include expected output in a separate block
• Use meaningful variable names
• Have inline comments only where non-obvious

Explanations should:

• Connect to real-world use cases
• Provide the "why" behind each step
• Use analogies to familiar concepts
• Anticipate the reader's "but what about...?" questions

Closing Section

## Summary

You've learned how to:
- [Outcome 1 restated]
- [Outcome 2 restated]

## Next Steps

- [Natural follow-on tutorial or topic]
- [Related documentation]
- [Community resources]

Phase 5: Validate

Before publishing, test the entire tutorial path:

1. Follow every step from a clean environment
2. Run every code example and verify output matches
3. Trigger every troubleshooting scenario at least once
4. Time the tutorial — does it match the estimate?
5. Have someone unfamiliar with the topic attempt it

Tutorial Formats

Anti-Patterns

• Introducing concepts before they are needed ("you'll use this later")
• Showing code snippets that cannot run standalone
• Assuming knowledge not listed in prerequisites
• Walls of text without code breaks
• Exercises without solutions (even collapsed/hidden ones)
• Skipping the "why" and only showing the "how"