I noticed yesterday that there were 5K+ issues filed against Claude Code on github (but down to 4.8K today!), so it may well be that this is what Cherny is churning through.

https://github.com/anthropics/claude-code/issues

If you read though a few pages of these issues, it doesn't seem to reflect too well on the quality of the code (self-written by Claude Code), so it seems the furious pace of development/bug fixing maybe shouldn't necessarily be taken as being the pace of generating production quality code. Claude Code is of course very useful, so people are very forgiving about issues, but I can't imagine most corporate software being very well regarded if the quality was such that it had 5K issues reported against it!