In a small bowl, whisk together the coconut aminos, rice vinegar, honey, arrowroot powder, and red pepper flakes until the starch is fully dissolved.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the diced chicken breast and sea salt to the skillet, searing for 5-6 minutes until the edges are golden brown and the meat is cooked through.
Toss in the sliced bell peppers, sugar snap peas, minced ginger, and garlic, sautéing for 3 minutes until the vegetables are vibrant and crisp-tender.
Stir in the fresh pineapple chunks and pour the prepared sauce over the mixture, tossing to combine.
Simmer for 1-2 minutes until the sauce thickens into a glossy, translucent glaze that coats every piece.
Serve the stir-fry immediately over the warm cooked brown rice for a complete and balanced meal.