Build notes, numbers, and the occasional wrong turn.

Can Claude connect to multiple Google accounts at once?

Yes. Claude can now answer questions across three Google accounts at once: every inbox, every calendar, in one conversation. It took four days, Claude Code wrote most of the code, and this is the whole journey: the hypothesis, the problem underneath it, the CASA trade-off, the build, the commercial call, and Claude's own account of what went wrong.