Execute next step in Composite Tool after finishing with previous step

Hello! I've recently tried to make some composite tools that work similar to the addon BoxCutter in Blender.

Basically:

1- Create a cube with 'Open cube tool' (while snapping the cube to another object)
2- Select that cube and the other object
3- Do a subtraction boolean

Tried to do something similar with the draw polygon tool, just with the extra step of extruding the polygon.

This would be an easy way to work with booleans, just create a shape and it's automatically cutted from a selected object.

Problem is that all of the steps are executed at the same moment, I would like to execute the next step in the composite tool AFTER being done with creating the box.

Thanks!

Here's a trailer for BoxCutter, to make clearer what I mean: https://www.youtube.com/watch?v=juZL5e5RU6s

I am not sure what your asked for. Can you explain in a video with a process sample showing what you want to achieve?
If you have created a composite tool can you show me its contents?

I am not sure what your asked for. Can you explain in a video with a process sample showing what you want to achieve?
If you have created a composite tool can you show me its contents?

This is what I want the tool to do: https://youtu.be/5du1J9ZnC8M
Opens the box tool, and after creating the box, it moves it a bit up, then performs a subtraction boolean from the selected object. This is what I got https://i.imgur.com/fqAzbmU.png

Same goes for the draw polygon tool, but this performs a extrude to cut the polygon from the mesh.

In your composite tool, you can replace the "P_Move Selection(*)" with "StreamLine Engine Tools > Move".
To move to next step from "StreamLine Engine Tools > Move", click "ESc" key.