Yes
Claude Code routinely handles large and complex code changes correctly
deterministic on Hacker News
In the thread “AI is a bad tool”
Helped: Directing the tool and reviewing every line of changes.
… I'm the maintainer of a large, business-critical C++ application with over a million lines of code that's used by major international companies. Claude Code routinely handles large and complex code changes correctly. I review every line that Claude Code adds or changes, so this isn't speculation. …