# WooCommerce plugin for user composable products - AI Context Document

**Author:** Marco Graetsch

## Project Overview

This plugin implements a special product type, for which users can select a limited number of product from a configurable set of simple or variable products. The limit of selectable products should be a global and per-product setting, for which global is the fallback. The set of selectable products can be defined per category, tag or SKU. The price is either a fixed price or the sum of the prices of the selected products. Think of a package of stickers as composable product, where each package can contain $limit number of stickers.

### Key Fact: 100% AI-Generated

This project is proudly **"vibe-coded"** using Claude.AI - the entire codebase was created through AI assistance.

## Technical Stack

- **Language:** PHP 8.3+
- **Framework:** Latest WordPress Plugin API
- **E-commerce:** WooCommerce 10.0+
- **Template Engine:** Twig 3.0 (via Composer)
- **Frontend:** Vanilla JavaScript + jQuery
- **Styling:** Custom CSS
- **Dependency Management:** Composer
- **Internationalization:** WordPress i18n (.pot/.po/.mo files)

## Implementation Details

### Security Best Practices

- All user inputs are sanitized (integers for quantities/prices)
- Nonce verification on form submissions
- Output escaping in templates (`esc_attr`, `esc_html`, `esc_js`)
- Direct file access prevention via `ABSPATH` check

### Translation Ready

All user-facing strings use:

```php
__('Text to translate', 'wc-composable-product')
_e('Text to translate', 'wc-composable-product')
```

Text domain: `wc-composable-product`

**Available Translations (as of v1.1.22):**

- `en_US` - English (United States)
- `de_DE` - German (Germany, formal)
- `de_DE_informal` - German (Germany, informal "du")
- `de_CH` - German (Switzerland, formal "Sie")
- `de_CH_informal` - German (Switzerland, informal "du")
- `fr_CH` - French (Switzerland)
- `it_CH` - Italian (Switzerland)

Note: Swiss locales use CHF currency formatting in examples (e.g., "CHF 50.-")

### Create releases

**Important Notes**

- The `vendor/` directory MUST be included in releases (Twig dependency required for runtime)
- Running zip from wrong directory creates empty or malformed archives
- Exclusion patterns must match the relative path structure used in zip command
- Always verify the package with `unzip -l` and test extraction before committing
- The `wp-core/` and `wp-plugins/` directories MUST NOT be included in releases!

**Important Git Notes:**

- Always commit from `dev` branch first
- Tags should use format `vX.X.X` (e.g., `v1.1.22`)
- Use annotated tags (`-a`) not lightweight tags
- Commit messages should follow the established format with Claude Code attribution
- `.claude/settings.local.json` changes are typically local-only (stash before rebasing)

#### What Gets Released

- All plugin source files
- Compiled vendor dependencies
- Translation files (.mo compiled from .po)
- Assets (CSS, JS)
- Documentation (README, CHANGELOG, etc.)

#### What's Excluded

- Git metadata (`.git/`)
- Development files (`.vscode/`, `.claude/`, `CLAUDE.md`)
- Logs and cache files
- Previous releases
- `composer.lock` (but `vendor/` is included)

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Always refer to this document when starting work on this project. Good luck!