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Patterns for adding field validation in dept44 microservices — from using built-in annotations to writing custom validators. Use this skill whenever you need to validate API model fields, check which dept44 validators already exist (@ValidUuid, @ValidMunicipalityId, @OneOf, @MemberOf, etc.), create a custom ConstraintValidator, compose multiple validators with OR/AND logic, validate complex objects with multiple violation messages, or write tests for validators. Also use when you see validation-related compilation errors, need to understand why enums aren't used in API models (use @OneOf instead), or are adding new fields to a request DTO and need to pick the right validation approach.
How this skill is triggered — by the user, by Claude, or both
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/dept44:pattern-validatorThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
dept44 provides a rich set of built-in validators in `dept44-common-validators`. Always check these first — writing a custom validator when a built-in one exists is wasted effort.
dept44 provides a rich set of built-in validators in dept44-common-validators. Always check these first — writing a custom validator when a built-in one exists is wasted effort.
Source: <repos>/dept44/dept44-common-validators/src/main/java/se/sundsvall/dept44/common/validators/annotation/ — <repos>/ is the local clone root; if you don't already know it, use the dept44-source skill (its SKILL.md explains how to locate it), or browse Sundsvallskommun/dept44 on GitHub.
Read the relevant file(s) based on your situation.
| Topic | Reference file | When to read |
|---|---|---|
| Built-in validators + simple field validator | references/builtin-and-simple.md | Looking up existing validators or writing a basic single-field validator |
| Complex object validator | references/complex-validator.md | Validating an object with multiple fields, emitting multiple violation messages |
| Composite validator (OR/AND) | references/composite-validator.md | Combining existing validators without writing an implementation class |
| Testing validators | references/testing.md | Writing unit tests and {Resource}FailureTest integration tests for validators |
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npx claudepluginhub sundsvallskommun/claude-plugins --plugin dept44