Angular's 2025 developments centered on Signal Forms and the Resource API, both still experimental but nearing stable status. Signal Forms combine advantages of template-driven and reactive forms with modern signal-based architecture, simplified custom controls, and improved validation. The httpResource primitive bridges signals with asynchronous tasks. Major investments went into AI tooling, including an MCP Server and framework optimization for AI agents. Angular 21 made zoneless the default and switched to Vitest as the default testing framework. The @angular/animations package was deprecated in favor of template-based animate.enter and animate.leave directives. The @angular/aria package provides accessibility directives for custom UI components.