The Masked validator decorates other validators to mask sensitive input
values in error messages while still validating the original unmasked
data.
This validator is essential for applications handling sensitive
information such as passwords, credit cards, or email addresses. Without
it, users would need to implement a custom layer between Validation and
the end user to prevent PII from appearing in error messages or logs.
With Masked, sensitive data protection is built directly into the
validation workflow with no additional abstraction required.
Assisted-by: Claude Code (Opus 4.5)
