Attributing these to "hidden requirements" is a slippery slope.

My own experience using Claude Code and similar tools tells me that "hidden requirements" could include:

* Make sure DESIGN.md is up to date

* Write/update tests after changing source, and make sure they pass

* Add integration test, not only unit tests that mock everything

* Don't refactor code that is unrelated to the current task

...

These are not even project/language specific instructions. They are usually considered common sense/good practice in software engineering, yet I sometimes had to almost beg coding agents to follow them. (You want to know how many times I have to emphasize don't use "any" in a TypeScript codebase?)

People should just admit it's a limitation of these coding tools, and we can still have a meaningful discussion.