How to create rule that force agent to choose value from StoryPoints when changing status of ticket?

[Przemysław Grzenkowicz]

Let`s say agent is changing status of the ticket (request) in JSM to ,,resolved" or ,,waiting for customer" and I need the rule that forces agent to choose value from story points whenever he decides to change the status of the request. It would be perfect if the change of the status could be possible only when value of story point is changed as well. So changing status should be triggering popup with an option to change story point value. In this way estimation happens always when we want. Thank you very much for your answers.

[Jack Brickey]

If you are on Cloud using CMP project then edit the workflow and add a Field modified Validator to the transition in question. LMK if you need more details on how this is accomplished.

[Przemysław Grzenkowicz]

What you mean by CMP project? 

[Jack Brickey]

Company Managed Project vs. TMP - Team Managed Project

if you are on server then these project types do not apply.