Bootloop/brick S6 edge

Only boots into recovery. I have tmobile & rooted the phone & added Twrp.. it was fine until a restart thats been booting into recovery ever since. Twrp states that I have no operating system & no longer rooted. Restores, wipes, cache dalv. Prt wipe & mounts still nothing. now I have no backup. Can anyone help me with getting all the names of the files I'll need to do my COMPLETE reset?? I am new to this so prob also need help with process.

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