I am trying to capture the dev machine local screen, so that I can understand what they are working on and their activity. I am lookign for any tools that can do this or any algorithms. Does this clarify?
Yes, that clarifies things - the term you are looking for is "spyware". I cannot think of many legit reasons to want to build this. If you want to know what devs are working on, look at what they commit into source control.
I want to build a software, an analytics system infact that learns from the dev's activity and help them imporve their productivity, and inorder to do this i want to capture the dev's screen but not bring any data out, keep all data local and private
asciinema?
This helps, I was looking for something more holistic like screenpipe or pieces
If you are looking to capture your screen and a11y tree to understand the activity then there are some popular frameworks like screepipe, wakatime that stores this and provides analytics on the captured data. you can look for other competitors around similar products