> ## 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

💡 **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.

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## 🚦 Device Shadow & Last Heartbeat Filters in Actions

![](https://mintcdn.com/bytebeamio/z5XdwW28dRdoJP9s/assets/new_filter_in_actions.png?fit=max\&auto=format\&n=z5XdwW28dRdoJP9s\&q=85\&s=cf36331da6ffdd0320615dd521bee891)

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 — giving you greater accuracy and control when managing device operations.

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## ✉️ Custom Subject Line for Email Notification Rules

![](https://mintcdn.com/bytebeamio/7ZanZxvE-JoDl3Jp/assets/subject_in_email_notification_rules.png?fit=max\&auto=format\&n=7ZanZxvE-JoDl3Jp\&q=85\&s=2aaafeadff9f866397ed8fe46225e053)

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.

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## 🐞 Bug Fixes & 🔧 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.

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💡 **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.


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