Warning!
Don't use this api as a dependency! I need some feedback to resolve possible bugs to make this a stable api.

This api allows u to use vanilla minecraft command target selectors as expressions or arguments in skript.

Spoiler: What is a target selector?

A target selector is used to target players or entities in your game commands. There are 5 target selectors that you can choose from.

More info:
https://www.digminecraft.com/getting_started/target_selectors.php

Spoiler: Currently supported

1.13 or up.
@a, @p, @e, @r, @s.
all selector tags like [distance], [name], [type].
player, command_block and console executers.

Spoiler: Requirements

Bukkit 1.13+ (and ofc Spigot/Paper also work since they based on bukkit)
Skript 2.4 https://github.com/SkriptLang/Skript/releases
Skript-Mirror 2.0.0 https://skripttools.net/dl/skript-mirror+2.0.0-SNAPSHOT.jar

Spoiler: Syntax

Code (Text):

1.  
2. Expressions:
3. @(a|e|p|r|s)[\[<(.+)>\]] from %command sender%
4. [@]%object% from %command sender%
5.  

Spoiler: Example codes

Code (Text):

1.  
2.  
3. #Looping a Basic selector
4.  
5. command /example1:
6.     trigger:
7.         loop @a from command sender:
8.             send "Hi!" to loop-selected
9.  
10. #Basic selector
11.  
12. command /example2:
13.     trigger:
14.         send "Hi!" to @a from command sender
15.  
16. #Basic selector2
17.  
18. command /example3:
19.     trigger:
20.         send "Hi!" to @p from command sender
21.  
22. #Basic argument selector
23.  
24. command /example4 <text>:
25.     trigger:
26.         send "Hi!" to @arg 1 from command sender
27.  
28. #Looping a Basic selector and getting its location
29.  
30. command /example5:
31.     trigger:
32.         loop @e from command sender:
33.             set {_s} to loop-selected #Need to set to a var first bc of a bug
34.             send "%{_s}% %location of {_s}%" to @a from command sender
35.  
36. #Advanced selector
37.  
38. on right click on netherrack:
39.     send "Hello everybody close by!" to @a[distance=0..10] from player
40.  

#More info about the bug:

Spoiler: Bug

https://github.com/SkriptLang/Skript/issues/2878#issuecomment-604356720

Spoiler: Planned

Fixing expected bugs.

Suggestions? (No 1.12 or lower support expected.)