I built Deff because AI coding tools sped up writing code, but reviewing their changes became the new bottleneck. Most of my time was going into checking noisy diffs, understanding intent, and making sure nothing subtle broke. Deff is focused on one thing: helping you review AI-generated code changes faster and with more confidence. It helps surface what changed and is allowing me to use it with some vim motions so I can easily jump from nvim to opencode to deff. Would love feedback from people using AI coding assistants heavily — especially on review workflows, false positives, and what still feels slow.