Hello all,
Around 3 weeks ago I got a new clutch and clutch assembly on my 02 wrx (slave cylinder, master cylinder) done by a reputable shop. In the past week I started noticing some squeaking and resistance in the clutch pedal. Yesterday I decided to go under the car to see if there was anything obvious and I noticed right where the slave cylinder meets the spring (not sure what this is called) there is reddish fluid with some of it dripping down. I’m wondering if this is clutch fluid or grease? And if this could have to do with how the clutch has been feeling? (I have pictures just unsure how to post them) Thanks!

As far as posting pictures, you are going to have to use an image hosting site that isn't Imgur. Or you can just post the Imgur links as text so people can select ctrl+c+v it into the browser. I can't help with your real issue unfortunately, good luck!

If the mechanic properly did the job, there would be no red fluid anywhere. Regular brake fluid goes into the reservoir.

Just as a point of interest, replacing the master and slave is a cake job. Easy enough to do that it's worth just doing if you think either piece is bad. Take off the intercooler and the job is a big nothing.

Bleeding it sure sucks, haha. I installed a speed bleeder valve that is made for a brake caliper and it made the job really easy.