I have a wide range of Claude Code based setups, including one with an integrated issue tracker and parallel swarms.

And for anything really serious? Opus 4.5 struggles to maintain a large-scale, clean architecture. And the resulting software is often really buggy.

Conclusion: if you want quality in anything big in February 2026, you still need to read the code.

Opus is too superficial for coding (great at bash though, on the flipside), I‘d recommend giving Codex a try.