Installing hot countertop next to sink and faucet, should I place a shut stale spigot underneath the sink? There is currently no shut off valve of late for the sink,...

There is currently no shut off valve of late for the sink, is this necessary to have? I hold copper plumbing and just bought a new moen faucet that have two copper tubes for the hook-ups. It seems easy to install, but should I place a shut sour valve before installation? I am not that handy and thought that if I tried this it may inflict more damage and hassle than what its worth. Please advise.
it is other best to have a shut off spout under the sink.if there is a dribble you can turn it off easy.it you want 2 do maintaince or in recent times change the fixtures it makes it easier yes simply go to home depot or lowes and ask for two shut off valve with 1/2 inch compression fittings on them they go right onto the cooper supply lines near no soldering just tightin them on there
Lot easier to stop a percolate problem under the sink with a shut past its sell-by date valve - otherwise you have to shut the wet off at the main - take more time to go to the main, and, depending on the size of the escape, you'd have more to clean up!

Just my thoughts.
Answers:    It is code to hold those shut-offs. Imagine a situation where the faucet needs parts that aren't at hand. You would not want it running continuously while waiting for parts from Moen, nor would you want to be turning the house valve on & off.

Yes, you want some angle stops underneath the kitchen sink. Not really all that difficult (you have to connect the faucet to something), and if, sometime surrounded by the future, you find yourself in a desperate situation with that faucet, you'll be very glad that they're in that.

I would recommend a pair of Brasscraft CR-19 - 5/8" x 3/8" compression x compression 1/4 turn angle stops (5/8" is the OD of 1/2" copper pipe - 3/8" is the most common size riser).
not the finish off of the world if you dont-they sell cut offs that will screw on-