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wordpress-plugin-core

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Build secure WordPress plugins with hooks, database interactions, Settings API, custom post types, and REST API. Covers Simple, OOP, and PSR-4 architecture patterns plus the Security Trinity. Includes WordPress 6.7-6.9 breaking changes. Use when creating plugins or troubleshooting SQL injection, XSS, CSRF, REST API vulnerabilities, wpdb::prepare errors, nonce edge cases, or WordPress 6.8+ bcrypt migration.

wordpress-plugin-core/SKILL.md

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Feb 15, 2026
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# WordPress Plugin Development (Core)

**Last Updated**: 2026-01-21
**Latest Versions**: WordPress 6.9+ (Dec 2, 2025), PHP 8.0+ recommended, PHP 8.5 compatible
**Dependencies**: None (WordPress 5.9+, PHP 7.4+ minimum)

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## Quick Start

**Architecture Patterns**: Simple (functions only, <5 functions) | OOP (medium plugins) | PSR-4 (modern/large, recommended 2025+)

**Plugin Header** (only Plugin Name required):
```php
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