Module error 

Error categories for distinguishing exit codes.

• ErrorKind::Config -> exit code 1 (config/validation failure)
• ErrorKind::Runtime -> exit code 2 (runtime / device / I-O error)

Structs

AppError

A message tagged with an ErrorKind so the caller can pick the right exit code.

Enums

ErrorKind

Error category carried alongside messages to select exit codes.

Functions

exit_code_for

The exit code associated with an ErrorKind.