Whisk peanut butter, soy sauce, honey, lime juice, and sriracha, adding warm water as needed to make a smooth sauce.
Pour sauce into the skillet with chicken, simmer for 1-2 minutes, stirring to emulsify.
Toss cooked noodles into the skillet, stirring for 1-2 minutes until coated and heated through. Finish with green onions, cilantro, sesame oil, and black pepper.
Notes
Adjust spice level with more or less sriracha, and add extra lime or salt to taste before serving.