@gopher.ny I use "remove string" in a few rules to modify a list of devices that I don't want their entire display name included. Example Dining Room Window, I use "remove string" to remove the "window" so it becomes Dining Room. If the variable contains multiple devices (Dining Room Window, Office …

You can already do this with a single action in RM, using Replace instead of Remove: [image]

I want a variable string including a list of window contact sensors that are currently open. In an effort to make the announcements sound more "natural" I use RM to remove "window" from the variable string. The "raw" string is [Office Window, Living Room Window, etc], but I don't want the "window" …

[image] halfrican.ak: I want a variable string including a list of window contact sensors that are currently open. Just curious how you are building that list in RM? I do this in webcore (with doors - same use case) since I did not believe it was possible in RM. Would love to get this into…

It's a bit of a mess, but I'm using the community app "sensor groups+" to track and list the open sensors, then I'm using RM to manipulate the variable to my preference. It's another use case where if I took the time to learn to code groovy it would be much simpler. I just modified the rule to omit …

Gotcha, If you are up for using webcore, you could probably do it fairly simply using replace, in the example I have below at the announcement phase "Attention, the following doors have been left open, " + replace(devOpenDoor, " Door", "") [image]

Right, but then you have to have several rules to build the list in the first place, or several steps in a rule.

Feature Request Rule Machine Variables

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bertabcd1234 November 2, 2026, 4:13pm 2

Can I ask what the use case is? If it's something like mine is/was, I wrote a custom app for my need, which could probably be easily modified if it's not quite yours: