Can I use green wire in a residential wall box?
Green wire is perfectly legit. If you are really lazy or in a hurry you can even get pre-cut pre-stripped green grounding pigtails ready to go.
Ground is the only thing it can be used for, but &quot;green or bare&quot; is fine for ground nearly everywhere (I think there are some hot tub/pool specific cases where green is required and bare is not OK, but I don't have any detailed familiarity with those installations as I don't have one.)
Incidentally, it's trivial to strip long lengths of wire with a utility knife if you clamp the end of the wire and pull as you cut. I opted to go full conduit and have been using the NM that was partially installed as grounds (where needed - most of the grounds are the EMT conduit itself), and can strip a 12 foot chunk in less than a minute. I detest the scam where the THHN inside NM cable is not labeled as THHN so it cannot be used any other way...