There was a month where I blew through my token budget without noticing. Claude Code and Codex, running most of the day, on a codebase I was exploring more than editing. The ceiling I'd set turned out to be a number I'd passed weeks earlier, and I found out by getting the bill. So I did the thing I'd been putting off, and ran a coding agent on my own machine to see what happened. The short version: Qwen Code, driving a quantized Qwen against a local llama.cpp server, built the UI fi...