Heat the oil in a medium nonstick skillet over medium heat. Add the onion, tomato, jalapeño, garlic, ¼ teaspoon sea salt, and several grinds of fresh pepper. Cook for 2 minutes, stirring, until softened. Add the eggs and crumbled chips and stir to scramble. Stir in cheese and remove from the skillet.
Sprinkle with cilantro, season to taste with more salt and pepper, and serve with tortillas, avocado slices, lime wedges, and salsa.