How to retrieve the latest comment on a Slack message in a specific channel ? As trigger I use a reaction added to the comment.
Thanks for your help
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This thread might be helpful:
Hi there, 
Have you already tried the approach mentioned in the Community thread that pranayshinde shared? If not, there’s now a Retrieve Thread Messages action available for Slack that can pull all the messages for a Slack thread:
So you could use that to get all the messages in the thread and then pass them to a Formatter (Utilities > Line-item to Text) action to extract the last message. For example:
There’s a field called Output Item Last that will contain the last message that was output by the Retrieve Thread Messages action:
Hope that helps. If you run into any issues on that or find another way to solve this, please let us know—we’d love to hear from you! 
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