Features used to implement the example

• Write field on linked issues or sub-tasks
• Copy parsed text to a field

Example: Execute transition in epic

I have a task and Epic. When I proceed with a task automatically the Epic status progresses. (execute transition in Epic).

You should enter a pair of post-functions in the transition of task's workflow used for making task's proceed (e.g. "Proceed Task"). These post-functions are:

Insert Copy a parsed text to a field post-function with the following configuration:

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I'm supposing that transition "Start Progress" in epic's workflow is used for making epics progress.

Insert Write field on linked issues or sub-tasks post-function with the following configuration:

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Once configured, "Proceed Task" transition in task's workflow will look like this:

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