Building Phonton: a local-first AI coding CLI that verifies diffs before review

I have been building Phonton CLI , an open-source local-first AI coding agent. The idea is simple: instead of treating an AI coding tool like a chat box, Phonton treats it like an engineering workflow. It tries to follow this loop: You give it a goal. It creates a plan. It works against your local repo context. It verifies the generated diff. You review the result before accepting it. Most AI coding tools are optimized for speed and convenience. Phonton is more focused on making AI-generated cha