Add the chicken: Place the chicken breasts (or thighs) in the bottom of your slow cooker in a single layer if possible.
Mix the sauce: In a bowl, whisk together sweet chili sauce, soy sauce, rice vinegar, honey, garlic, ginger, sriracha (if using), lime juice, and water or broth.
Season and pour: Lightly season the chicken with salt and pepper.
Pour the sauce over the top, making sure it coats the chicken well.
Cook low and slow: Cover and cook on Low for 3.5–5 hours or on High for 2–3 hours, until the chicken is tender and easily shreds with a fork. Breasts cook faster than thighs.
Shred the chicken: Transfer chicken to a cutting board and shred with two forks. Return the chicken to the slow cooker and stir to coat in the sauce.
Thicken (optional): If you want a glossier, clingy sauce, whisk cornstarch with water, stir it into the slow cooker, and cook on High for 10–15 minutes until slightly thickened.
Taste and adjust: Add more lime for brightness, a splash of soy for salt, or honey for sweetness.
Serve: Spoon over hot rice or grains.
Top with green onions, sesame seeds, and cilantro. Add lime wedges on the side.