Filenames in the beginning of result file

[VitaliyAT]

Is it possible write list of concatenated files (in the beginning) that successfully included in final variant?

It's always pain in the neck even on development stage when you not understand what was included and why your code not working (when no console message at all. for example libraries loaded, but your own js - no) Quick view of final concatenated file for recognition is not quick at all. You can stay for a lot of time even you have some comments in the beginning of section.

If it's possible: could you say how?
Else: could you look at it like on suggestion?

[yocontra]

Have you tried using gulp-debug?