TypeScript and Go on a 1.5 million SLOC production codebase; a complex SaaS tool for financial planning and analysis. Quite far from being “just CRUD”. Before Anthropic Opus 4.5 I was trying out Claude Code and wasn’t all that impressed, but since then it’s definitely helped. The project I wrapped up before Christmas would have gone into the new year without it. You’ve still got to keep a close eye on it; whenever I’ve got lazy with review, trusting it too much, I’ve always regretted it. It’s never one-shotted anything, even with plan mode and all that. I’m a natural skeptic on this stuff and was very actually skeptical for most of last year. But I’m very confident there’s a large net productivity gain now.