feat: characterized the existing use cases as a baseline; every repo fake behaves like the real ones and can be told to fail, every use case is covered; gremlins runs clean on useCases

CODING_STANDARDS.md

@@ -94,3 +94,7 @@ These rules apply to every file in this repo , for humans and agents alike.
 4. **Needless complexity**.
 5. **Needless repetition**.
 6. **Opacity** — the code is hard to understand.
+
+## Credits
+
+Thanks to [@wojtekluwojteklu/clean_code.md](https://gist.github.com/wojteklu/73c6914cc446146b8b533c0988cf8d29)