01 - Pat chicken thighs completely dry using paper towels. Season both sides lightly with salt and black pepper.
02 - In a medium bowl, whisk together sweet chili sauce, soy sauce, honey, rice vinegar, minced garlic, grated ginger, and red pepper flakes until fully incorporated.
03 - Add seasoned chicken thighs to the bowl, turning to coat thoroughly in the glaze. Let marinate for at least 10 minutes, or refrigerate up to 2 hours for deeper flavor penetration.
04 - Preheat air fryer to 400°F for 3 minutes before cooking.
05 - Place marinated chicken thighs in the air fryer basket skin-side up, arranging in a single layer without overcrowding. Reserve remaining marinade for glazing.
06 - Air fry chicken for 14 minutes at 400°F to render fat and begin crisping the skin.
07 - While chicken cooks, transfer reserved marinade to a small saucepan. Bring to a boil over medium-high heat, then reduce to a simmer for 2-3 minutes until slightly thickened and reduced.
08 - Brush chicken thighs generously with the thickened glaze. Return to air fryer for an additional 4 minutes until skin is crispy and caramelized, and internal temperature reaches 165°F.
09 - Remove chicken from air fryer and let rest for 2-3 minutes to allow juices to redistribute. Garnish with chopped cilantro or green onions and toasted sesame seeds before serving.