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If the clutch just came off the compressor is probably fine.
You don't even need to evacuate the system. It's a simple job.
If you are worried about it have the recover the refrigerant then pull both hoses that bolt to the compressor. With a "q-tip" ran around the inside of the hoses and compressor opening if you catch metal particles with it it's a done deal. If not throw a clutch on it and recharge it. I would never recommend a full system unless I checked for metal in the lines. If they didn't do this before recommending it take it to another dealer and walk away. That's shady and not the right way to take care of you as a customer. Sounds like a service advisor is trying to make a quota this month on your dime.