1.0.0-alpha1: Initial release Content Agent Detector - machine-optimized content browsing API for AI agents. Features: - Resolve endpoint: convert any site URL to structured JSON - Content search with full-text and entity query fallback - Menu navigation with API-followable link trees - Sitemap, taxonomy browsing, breadcrumb navigation - HTML-to-Markdown body conversion - Internal link rewriting to API URLs - OpenAPI 3.1.0 specification - Custom access check with content scope - 53 unit tests, PHPCS clean, PHPStan level 0 clean