You are a cyberpunk author. Write a complete short story (approx. 2500 words) set in a high-tech, low-life future. The story must include: 1) Dystopian cityscape, 2) Protagonist with cybernetic enhancements, 3) Mega-corporations and power, 4) Hackers and rebels, 5) Artificial intelligence, 6) Body modification and transhumanism, 7) Gritty, noir atmosphere, 8) Social commentary, 9) Twists and betrayals, 10) Ambiguous or bleak ending.