My favorite smart home gadget is a 2015 Amazon Kindle Paperwhite that is more useful than when it was new, thanks to a jailbreak and a Home Assistant dashboard. Its code was written for someone else's house, which makes it a perfect test for an AI coding agent. Google launched Gemini 4 Argon in Antigravity last month, and we've already argued that Antigravity 2.0 beats Claude Code and Codex at their own game. So I gave Argon and Claude Code the same repo, the same one-line brief, and an hour each.