If I do a Puts ("test"); from test.cs

How can I retrieve and use the [test] test console output from another plugin?

Why would you need to catch log output from another plugin?

I don’t know if it’s the best solution.  the idea would be to trigger a method in one plugin and use the result on another.  
For example in test.cs, TestGrade () return true and player.DisplayName and I would like since plugins2.cs to execute a task if test grade return true and a message with the displayName.

You would want to call the hook/method in the other pugin and get a response that way, not via a log file.

Yes, that's it.

Merged post

I've got it! Thanks for pointing me in the right direction.