For Parent Story, Story points should get auto populated from all child stories. It should be sum of story points of all Child stories
I'd do it with the script runner, but you could do something with your own (java) plugin or one of the other plugins that provides scripting. Shouldn't be hard - get list of subtasks of issue, iterate through them reading the story point field and add up the values.
I do not understand Atlassian and their priorities. I have now seen a lot of requests for rolled up story points to a parent Story, even an Epic with Stories that have linked stories.. It seems like a totally natural thing that you would like a TOTAL count of all hierarchical Stories no matter how deep it goes.. How else would you know how far you are on an Epic..
With the plugin "Epic Sum Up" you can summate the story-points (and further) of an epic and all the sub issues/sub tasks:
Hope it helps you!
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