> ## Documentation Index > Fetch the complete documentation index at: https://bytebeam.io/docs/llms.txt > Use this file to discover all available pages before exploring further. # R36 03-December-2025 πŸ’‘ **Explore Our Latest Features** Take a deep dive into what’s new in this release! Have questions? [**Request a Demo**](https://cal.com/kraviteja/bytebeam-101) for a personalized walkthrough. *** ## 🚦 Device Shadow & Last Heartbeat Filters in Actions We’ve expanded the filtering capabilities on the **New Action** page by adding: * **Device Shadow stream columns** * **Last Heartbeat timestamp** This enhancement allows you to precisely filter and target devices *before* selecting them and triggering an action β€” giving you greater accuracy and control when managing device operations. *** ## βœ‰οΈ Custom Subject Line for Email Notification Rules You can now **customize the Subject line** while configuring **Email Notification Rules**. A default subject template is provided, and users can easily edit it to align with their notification style, making alerts more meaningful and easier to identify. *** ## 🐞 Bug Fixes & πŸ”§ Minor Improvements * **Performance optimizations** – Improved performance with 5x faster parsing and 30x lower resource utilization in **DBC Parsers**. * **Phases sunset** – Removed the *Phases* feature from Actions for a cleaner and more streamlined experience. * **Hex & precision download options removed** – Removed the *Download with Hex* and *Round-off Precision* options from the Download Data modal due to performance concerns. *** πŸ’‘ **Need More Insights?**\ Want to understand how these improvements can help your workflow?\ [**Request a Demo**](https://cal.com/kraviteja/bytebeam-101) and schedule a personalized session with our team.