Yes. Yesterday, Opus 5 on Claude Code with high effort.

It was to build an extremely simple job using an internal framework to walk through a table and log the ids os some records that have a certain scenario.

There's a ton of jobs exactly like this in the codebase, and the framework code is in the codebase as well.

It was so silly I even thought of writing it myself, probably took me longer to steer claude to do it for me.

Anyway, it refused to use a method from the framework to retrieve the parameter as a list, it wanted to retrieve it as a string and parse the commas. I had spelled out in the initial prompt what method it should use.

I really don't like Claude much. Frontier my ass.