Internal unexpected

Code

INTERNAL/UNEXPECTED

What it means

This is the default fallback classification for errors that cannot be mapped by known normalization rules.

When it happens

• An unknown error is normalized and no kind-rule matches.
• No explicit fallback code is provided to AppError.ensure().

How to handle

• Always include a boundary meta.via so you can identify where the unknown error was caught.
• Preserve the original error as cause where possible.
• If this becomes frequent in one area, introduce a more specific code and document it.