The Function Rename That Missed File 13

I asked Claude Code to rename a function across the codebase. It found 12 files, made the change, and reported success.

A thirteenth file sat in a directory outside its search scope. No warning.

The app worked because that file only ran on a rare edge case. I caught it three days later during an unrelated test.

Now I grep manually after every multi-file rename. The agent's confidence is not the same as its coverage.

Has an agent confidently missed something you only found later?