Arrange the chicken breasts in the bottom of a large slow cooker.
In a medium bowl, add 1 cup coconut milk, ¾ cup peanut butter, 4 cloves minced garlic, 3 Tbsp soy sauce, 3 Tbsp honey, 2 Tbsp rice vinegar, 2 tsp lime juice, and ½ tsp red pepper flakes. Whisk to combine, then pour over the chicken.
Cover and cook 6-8 hours (low) or 3-4 hours (high). Reduce slow cooker to warm.
Remove chicken from the clow cooker, cut into chunks, and shred.
Return shredded chicken to the slow cooker and toss together to absorb the sauce.
Serve over bowls of rice, or rice noodles, and top with peanuts and fresh cilantro as desired.