What common mistake do developers make with Storage and bootstrap, why does the mistake cause problems, and what is the safer approach?

What common mistake do developers make with Storage and bootstrap, why does the mistake cause problems, and what is the safer approach? One recurring problem with storage and bootstrap is applying it without understanding the boundary it protects. Putting application secrets or manually edited runtime files inside source directories instead of using environment configuration and framework-managed storage. In addition, Storage holds generated files such as logs and framework cache artifacts, while bootstrap contains framework initialization and cached bootstrap files. Safer engineering approach: keep the responsibility in the correct layer, use the framework's supported API, validate and authorize inputs, avoid hidden side effects, and verify the behavior with tests.