Companion Project Creator

Create complete, executable companion projects that readers can clone and run immediately.

Core Principle

Companion projects must be COMPLETE and RUNNABLE, not snippets or partial code.

A Laravel companion project is a full Laravel installation. A Node companion project is a full Node project. A document companion project is a complete, usable document.

⚠️ CRITICAL: Mandatory Verification

Every code companion project MUST be verified by actually running it before it is considered complete.

This is NOT optional. A companion project that hasn't been executed and tested is NOT complete.

Verification Workflow

┌─────────────────────────────────────────────────────────────────────────────┐
│                    COMPANION PROJECT CREATION FLOW                           │
├─────────────────────────────────────────────────────────────────────────────┤
│                                                                             │
│  1. SCAFFOLD          Create base project (composer/npm/etc)                │
│         ↓                                                                   │
│  2. CUSTOMIZE         Add article-specific code                             │
│         ↓                                                                   │
│  3. VERIFY ⭐         ACTUALLY RUN THE CODE                                 │
│         │                                                                   │
│         ├── Install dependencies    → Must succeed                          │
│         ├── Run application         → Must start without errors             │
│         └── Run tests               → All tests must pass                   │
│         │                                                                   │
│         ├── ✅ All pass → Companion project complete                        │
│         └── ❌ Any fail → Fix code, return to step 3                        │
│                                                                             │
└─────────────────────────────────────────────────────────────────────────────┘

Verification Commands by Type

composer install

php artisan serve

php artisan test

npm install

npm start

node src/index.js

npm test

pip install -r requirements.txt

python src/main.py

pytest

npm install

npm start

npm test

npm install

npm run dev

npm test

go mod download

go run .

go test ./...

What "Verify" Means

You must actually execute these commands and confirm they succeed:

# Example: Laravel verification
cd code

# 1. Install - MUST SUCCEED
composer install
# ✓ Check: No errors, vendor/ folder created

# 2. Setup - MUST SUCCEED  
cp .env.example .env
php artisan key:generate
touch database/database.sqlite
php artisan migrate
# ✓ Check: No errors, database has tables

# 3. Run - MUST START
php artisan serve &
# ✓ Check: Server starts on localhost:8000
# ✓ Check: Can access in browser (if web app)
# Then stop the server

# 4. Test - ALL MUST PASS
php artisan test
# ✓ Check: "Tests: X passed" with 0 failures

If ANY step fails:

1. Read the error message
2. Fix the code
3. Re-run verification from step 1
4. Repeat until ALL steps pass

Verification Checklist

Before marking a companion project complete, confirm:

• install_command

  executed successfully (no errors)
• All dependencies installed (vendor/, node_modules/, etc. exists)

• run_command

  starts the application without errors
• Application is accessible (if web app, can load in browser)

• test_command

  executed successfully
• All tests pass (0 failures)
• No warnings that indicate missing functionality

DO NOT proceed to the next phase until all boxes are checked.

Companion Project Types

1. Code Companion Projects (

code

)

Complete application installations that can be:

• Cloned/copied
• Installed with one command
• Run immediately
• Tested

Laravel Application

Creation Process:

# 1. Create full Laravel project
cd content/articles/YYYY_MM_DD_slug/
composer create-project laravel/laravel code --prefer-dist

# 2. Configure for SQLite (no external DB)
cd code
cp .env.example .env
sed -i 's/DB_CONNECTION=mysql/DB_CONNECTION=sqlite/' .env
touch database/database.sqlite
php artisan key:generate

# 3. Install Pest
composer require pestphp/pest --dev --with-all-dependencies
php artisan pest:install

# 4. Add article-specific code
# - Models, Controllers, Routes, Views
# - Migrations, Seeders
# - Tests

# 5. VERIFY - Run migrations and tests
php artisan migrate
php artisan test
# ⚠️ DO NOT CONTINUE IF TESTS FAIL

Required Files (auto-generated by Laravel):

code/
├── app/
│   ├── Http/Controllers/
│   ├── Models/
│   └── Providers/
├── bootstrap/
├── config/
├── database/
│   ├── migrations/
│   ├── seeders/
│   └── database.sqlite
├── public/
├── resources/views/
├── routes/
│   ├── web.php
│   └── api.php
├── storage/
├── tests/
│   ├── Feature/
│   └── Unit/
├── .env
├── .env.example
├── artisan
├── composer.json
├── composer.lock
├── package.json
├── phpunit.xml
└── README.md          # Custom: explains the companion project

Article-Specific Additions:

• Custom models in

  app/Models/

• Custom controllers in

  app/Http/Controllers/

• Custom routes in

  routes/web.php

  or

  routes/api.php

• Custom views in

  resources/views/

• Custom migrations in

  database/migrations/

• Custom seeders in

  database/seeders/

• Feature tests in

  tests/Feature/

README.md Template:

# Companion Project: [Article Topic]

Complete Laravel application demonstrating [concept].

## Requirements

- PHP 8.2+
- Composer

## Installation

\`\`\`bash
cd code
composer install
cp .env.example .env
php artisan key:generate
touch database/database.sqlite
php artisan migrate --seed
\`\`\`

## Run the Application

\`\`\`bash
php artisan serve
\`\`\`

Visit http://localhost:8000 to see the example.

## Run Tests

\`\`\`bash
php artisan test
\`\`\`

## What This Demonstrates

1. [Concept 1] - See `app/Models/Example.php`
2. [Concept 2] - See `app/Http/Controllers/ExampleController.php`
3. [Concept 3] - See `tests/Feature/ExampleTest.php`

## Key Files

| File | Description |
|------|-------------|
| `app/Models/Post.php` | Demonstrates [concept] |
| `routes/web.php` | Routes for [feature] |
| `tests/Feature/PostTest.php` | Tests for [feature] |

## Article Reference

This companion project accompanies: "[Article Title]"

Node.js Application

Creation Process:

# 1. Create project
cd content/articles/YYYY_MM_DD_slug/
mkdir code && cd code
npm init -y

# 2. Install dependencies
npm install express
npm install --save-dev jest

# 3. Configure package.json
# Add scripts: "start", "test", "dev"

# 4. Add article-specific code
# 5. Run tests
npm test

Structure:

code/
├── src/
│   ├── index.js
│   ├── routes/
│   └── controllers/
├── tests/
│   └── example.test.js
├── package.json
├── package-lock.json
└── README.md

Python Application

Creation Process:

# 1. Create project
cd content/articles/YYYY_MM_DD_slug/
mkdir code && cd code
python -m venv venv

# 2. Create requirements.txt
# 3. Add article-specific code
# 4. Add tests with pytest

Structure:

code/
├── src/
│   └── main.py
├── tests/
│   └── test_main.py
├── requirements.txt
├── setup.py
└── README.md

2. Document Companion Projects (

document

)

Complete, usable documents that readers can adapt.

Types:

• Project plans
• Technical specifications
• Process documents
• Meeting templates
• Report templates

Structure:

code/
├── templates/
│   ├── project-plan-template.md
│   └── sprint-planning-template.md
├── examples/
│   ├── project-plan-filled.md
│   └── sprint-planning-filled.md
└── README.md

Each template must be:

• Complete (all sections present)
• Well-commented (explain each section)
• Ready to use (just fill in the blanks)

3. Diagram Companion Projects (

diagram

)

Complete Mermaid diagrams that render correctly.

Structure:

code/
├── diagrams/
│   ├── architecture.mermaid
│   ├── sequence.mermaid
│   └── flowchart.mermaid
├── rendered/           # Optional: PNG exports
│   └── architecture.png
└── README.md

Each diagram must:

• Be valid Mermaid syntax
• Include comments explaining components
• Render correctly in GitHub/VS Code

4. Configuration Companion Projects (

config

)

Complete, working configuration files.

Structure:

code/
├── docker/
│   ├── Dockerfile
│   ├── nginx.conf
│   └── php.ini
├── docker-compose.yml
├── .env.example
└── README.md

Must be:

• Complete (all required config present)
• Runnable (

  docker-compose up

  works)
• Well-commented

5. Script Companion Projects (

script

)

Complete, executable scripts.

Structure:

code/
├── scripts/
│   ├── deploy.sh
│   ├── backup.sh
│   └── setup.sh
├── lib/
│   └── helpers.sh
└── README.md

Must be:

• Executable (

  chmod +x

  )
• Include shebang (

  #!/bin/bash

  )
• Handle errors properly
• Include usage documentation

6. Data Companion Projects (

dataset

)

Complete datasets with schema.

Structure:

code/
├── data/
│   ├── sample-data.json
│   ├── sample-data.csv
│   └── seed.sql
├── schemas/
│   └── schema.json
└── README.md

7. Template Companion Projects (

template

)

Reusable file templates.

Structure:

code/
├── templates/
│   ├── component.tsx.template
│   ├── controller.php.template
│   └── model.php.template
├── generated/          # Example outputs
│   └── UserController.php
└── README.md

8. Spreadsheet Companion Projects (

spreadsheet

)

Complete spreadsheets with formulas.

Structure:

code/
├── spreadsheets/
│   ├── budget-tracker.xlsx
│   └── project-timeline.xlsx
├── csv/
│   └── raw-data.csv
└── README.md

Creation Workflow

Step 1: Determine Companion Project Type

Based on article content:

code

code

diagram

document

config

script

dataset

code

Step 2: Create Base Project

For code companion projects, ALWAYS start with proper project scaffolding:

# Laravel
composer create-project laravel/laravel code

# Node.js
mkdir code && cd code && npm init -y

# Python
mkdir code && cd code && python -m venv venv

# React
npx create-react-app code

# Vue
npm create vue@latest code

Step 3: Add Article-Specific Code

After base project exists:

1. Add models/classes
2. Add controllers/routes
3. Add views/templates
4. Add tests
5. Add seeders/sample data

Step 4: Verify Completeness

Code Companion Projects Checklist:

• Can be cloned fresh

• composer install

  /

  npm install

  works
• Application starts without errors
• Can be accessed in browser (if web app)
• All tests pass
• README explains setup and usage

Document Companion Projects Checklist:

• All sections are complete
• Placeholders are clearly marked
• At least one filled example exists
• README explains how to use

Step 5: Document the Companion Project

Every companion project needs a README.md with:

1. What it demonstrates
2. Requirements
3. Installation steps
4. How to run
5. How to test
6. Key files explained
7. Article reference

Integration with Article

Referencing Companion Project in Article

## Setting Up the Project

Clone the example and install dependencies:

\`\`\`bash
cd code
composer install
cp .env.example .env
php artisan key:generate
\`\`\`

See the complete working companion project in the `code/` folder.

Code Snippets from Companion Project

When showing code in the article, reference actual files:

Here's our Post model (`code/app/Models/Post.php`):

\`\`\`php
// From: code/app/Models/Post.php
<?php

namespace App\Models;

class Post extends Model
{
    // ... actual code from example
}
\`\`\`

Settings Integration

ALWAYS load settings.json before creating companion projects.

Step 1: Load Settings

# View settings for your example type
bun run "${CLAUDE_PLUGIN_ROOT}"/scripts/show.ts settings code

Or read directly:

const settings = JSON.parse(fs.readFileSync('.article_writer/settings.json'));
const defaults = settings.companion_project_defaults.code;

Step 2: Get Values from Settings

// .article_writer/settings.json → companion_project_defaults.code
{
  "technologies": ["Laravel 12", "Pest 4", "SQLite"],
  "scaffold_command": "composer create-project laravel/laravel code --prefer-dist",
  "post_scaffold": [
    "cd code",
    "composer require pestphp/pest pestphp/pest-plugin-laravel --dev --with-all-dependencies",
    "php artisan pest:install",
    "sed -i 's/DB_CONNECTION=.*/DB_CONNECTION=sqlite/' .env",
    "touch database/database.sqlite"
  ],
  "run_command": "php artisan serve",
  "test_command": "php artisan test"
}

Step 3: Merge with Article Overrides

If the article task has a

companion_project

settings.json defaults    +    article.companion_project    =    final config
──────────────────────         ────────────────        ────────────
scaffold_command: X            scaffold_command: Y      Y (article wins)
technologies: [A, B]           (not set)                [A, B] (use default)
has_tests: true                has_tests: false         false (article wins)

Step 4: Execute Commands

# 1. Run scaffold_command
composer create-project laravel/laravel code --prefer-dist

# 2. Run each post_scaffold command
cd code
composer require pestphp/pest pestphp/pest-plugin-laravel --dev --with-all-dependencies
php artisan pest:install
# ... etc

Step 5: Verify with test_command

# From settings.companion_project_defaults.code.test_command
php artisan test

Global defaults from

settings.json

{
  "companion_project_defaults": {
    "code": {
      "technologies": ["Laravel 12", "Pest 4", "SQLite"],
      "scaffold_command": "composer create-project laravel/laravel code",
      "post_scaffold": [
        "cd code",
        "composer require pestphp/pest --dev",
        "php artisan pest:install"
      ]
    }
  }
}

Article can override:

{
  "companion_project": {
    "type": "code",
    "technologies": ["Laravel 11", "PHPUnit", "MySQL"],
    "scaffold_command": "composer create-project laravel/laravel:^11.0 code"
  }
}

Common Mistakes to Avoid

❌ Wrong: Partial Code

code/
├── app/Models/Post.php      # Just one file!
└── README.md

✅ Correct: Complete Project

code/
├── app/                     # Full Laravel structure
├── bootstrap/
├── config/
├── database/
├── public/
├── resources/
├── routes/
├── storage/
├── tests/
├── .env.example
├── artisan
├── composer.json
└── README.md

❌ Wrong: Untested Code

// Example that might not work
class PostController {
    public function index() {
        return Post::all(); // Is Post even defined?
    }
}

✅ Correct: Tested, Working Code

// Tested with: php artisan test
class PostController extends Controller
{
    public function index()
    {
        return Post::with('comments')->paginate(10);
    }
}

// tests/Feature/PostTest.php exists and passes

Companion Project Task Recording

After creating companion project, update article_tasks.json:

{
  "companion_project": {
    "type": "code",
    "path": "code/",
    "description": "Complete Laravel app with rate limiting",
    "technologies": ["Laravel 12", "Pest 4", "SQLite"],
    "has_tests": true,
    "scaffold_command": "composer create-project laravel/laravel code",
    "files": [
      "app/Http/Controllers/ApiController.php",
      "app/Http/Middleware/RateLimitMiddleware.php",
      "routes/api.php",
      "tests/Feature/RateLimitTest.php"
    ],
    "run_instructions": "composer install && php artisan serve",
    "test_command": "php artisan test",
    "verified": true,
    "verified_at": "2025-01-15T14:00:00Z"
  }
}