01 - Arrange chicken breasts evenly across the bottom of the slow cooker insert.
02 - Combine cream cheese, Parmesan, heavy cream, minced garlic, Italian seasoning, salt, pepper, red pepper flakes, cream of chicken soup, and chicken broth in a mixing bowl. Whisk vigorously until completely smooth and well incorporated.
03 - Pour the prepared sauce mixture over the chicken breasts, ensuring even coverage.
04 - Cover and cook on HIGH setting for 4 hours or LOW setting for 6 hours, until chicken reaches internal temperature of 165°F and shreds easily.
05 - Twenty minutes before serving, cook pasta in salted boiling water according to package directions until al dente. Drain thoroughly in a colander.
06 - Transfer cooked chicken breasts to a clean surface. Using two forks, shred meat into bite-sized pieces. Return shredded chicken to the slow cooker and mix thoroughly with the sauce.
07 - Add drained pasta to the slow cooker. Gently fold until pasta is evenly coated in the creamy garlic Parmesan sauce. Serve immediately topped with fresh chopped parsley.