Comment by Tadpole9181

I still do upfront planning and then do careful review of all AI content. The behavior the parent described above hasn't happened for me since around Opus 4.6.

The most telling one is counting function invocations wrong, because that's simply not how models work anymore. They use terminal commands and Python scripts for research like that (if not an LSP, if one took the time to set up their tools most effectively).

Combined with their attitude, I have little doubt that the parent has disabled tool calls, is working in some janky Harness like chat/Duo/Juno, or is using a severely reduced or outdated model.